Recently my 2000 civic sir (si in the US) has started to hesitate or stutter
periodically. It happens between 1500 and 2500 rpm and I beleive it's
usually when it's warm, and I'm accelerating from a stop. Any ideas what
this could be?

 

Jeremy Chapman wrote:
> Recently my 2000 civic sir (si in the US) has started to hesitate or
> stutter periodically. It happens between 1500 and 2500 rpm and I
> beleive it's usually when it's warm, and I'm accelerating from a stop.
> Any ideas what this could be?
You changed the fuel filter?

Checked air filter?

Had any work done under the hood, where some one could have pulled a
vacuum hose lose?

Changed the fuel cap?

 

I have recently replaced the air filter, changed oil/filter, and pcv valve.
The problem started shortly before I did this.
If it was a vaccume hose issue, how can I track down the leak?

"Linuxiac" <"2"@yahoo.com> wrote in message
news:4619ac7b$0$17195$4c368faf@roadrunner.com...
> Jeremy Chapman wrote:
>> Recently my 2000 civic sir (si in the US) has started to hesitate or
>> stutter periodically. It happens between 1500 and 2500 rpm and I beleive
>> it's usually when it's warm, and I'm accelerating from a stop. Any ideas
>> what this could be?
> You changed the fuel filter?
>
> Checked air filter?
>
> Had any work done under the hood, where some one could have pulled a
> vacuum hose lose?
>
> Changed the fuel cap?
>

 

Jeremy Chapman wrote:
> Recently my 2000 civic sir (si in the US) has started to hesitate or
> stutter periodically. It happens between 1500 and 2500 rpm and I
> beleive it's usually when it's warm, and I'm accelerating from a stop.
> Any ideas what this could be?

you'll almost certainly have codes stored in the computer. read them,
then report back.

 

I hooked up a computer two weeks ago when it started,and there were no
codes. My girlfriend said the check engine light blinked a few times on her
way to work, so I'll check again. Haven't seen the light come on since.

I'll check again this week.

"jim beam" <spamvortex@bad.example.net> wrote in message
news:qe2dnazRB9sR94fbnZ2dnUVZ_vPinZ2d@speakeasy.ne t...
> Jeremy Chapman wrote:
>> Recently my 2000 civic sir (si in the US) has started to hesitate or
>> stutter periodically. It happens between 1500 and 2500 rpm and I beleive
>> it's usually when it's warm, and I'm accelerating from a stop. Any ideas
>> what this could be?
>
> you'll almost certainly have codes stored in the computer. read them,
> then report back.

 

No codes. I was able to get the engine light blink a few times. I was
accelerating from stop, and the engine was hesitating, kind of boggin down.
I floored it and after about two seconds the engine light blinked 5 or 6
times. After about 5 seconds the engine started responding properly and the
engine like went away. No codes were saved.

"jim beam" <spamvortex@bad.example.net> wrote in message
news:qe2dnazRB9sR94fbnZ2dnUVZ_vPinZ2d@speakeasy.ne t...
> Jeremy Chapman wrote:
>> Recently my 2000 civic sir (si in the US) has started to hesitate or
>> stutter periodically. It happens between 1500 and 2500 rpm and I beleive
>> it's usually when it's warm, and I'm accelerating from a stop. Any ideas
>> what this could be?
>
> you'll almost certainly have codes stored in the computer. read them,
> then report back.

 

Jeremy wrote:
> No codes. I was able to get the engine light blink a few times. I was
> accelerating from stop, and the engine was hesitating, kind of boggin
> down. I floored it and after about two seconds the engine light blinked
> 5 or 6 times. After about 5 seconds the engine started responding
> properly and the engine like went away. No codes were saved.

don't believe you! how did you try to read them?

>
> "jim beam" <spamvortex@bad.example.net> wrote in message
> news:qe2dnazRB9sR94fbnZ2dnUVZ_vPinZ2d@speakeasy.ne t...
>> Jeremy Chapman wrote:
>>> Recently my 2000 civic sir (si in the US) has started to hesitate or
>>> stutter periodically. It happens between 1500 and 2500 rpm and I
>>> beleive it's usually when it's warm, and I'm accelerating from a
>>> stop. Any ideas what this could be?
>>
>> you'll almost certainly have codes stored in the computer. read them,
>> then report back.
>

 

I've got an obd2 code reader. It connects with a green light and no codes
are reported. I know it works because we've connected it to other vehicles
and it's reported codes on them.

"jim beam" <spamvortex@bad.example.net> wrote in message
news:eoKdnYjw6vTYnb7bnZ2dnUVZ_v3inZ2d@speakeasy.ne t...
> Jeremy wrote:
>> No codes. I was able to get the engine light blink a few times. I was
>> accelerating from stop, and the engine was hesitating, kind of boggin
>> down. I floored it and after about two seconds the engine light blinked 5
>> or 6 times. After about 5 seconds the engine started responding properly
>> and the engine like went away. No codes were saved.
>
> don't believe you! how did you try to read them?
>
>>
>> "jim beam" <spamvortex@bad.example.net> wrote in message
>> news:qe2dnazRB9sR94fbnZ2dnUVZ_vPinZ2d@speakeasy.ne t...
>>> Jeremy Chapman wrote:
>>>> Recently my 2000 civic sir (si in the US) has started to hesitate or
>>>> stutter periodically. It happens between 1500 and 2500 rpm and I
>>>> beleive it's usually when it's warm, and I'm accelerating from a stop.
>>>> Any ideas what this could be?
>>>
>>> you'll almost certainly have codes stored in the computer. read them,
>>> then report back.
>>

 

"Jeremy Chapman" <nospam@please.com> wrote in message
news:W1gSh.45947$aG1.37731@pd7urf3no...
> Recently my 2000 civic sir (si in the US) has started to hesitate or
> stutter periodically. It happens between 1500 and 2500 rpm and I beleive
> it's usually when it's warm, and I'm accelerating from a stop. Any ideas
> what this could be?
>
For the experts: does this sound like distributor trouble?

 

Jeremy wrote:
> I've got an obd2 code reader. It connects with a green light and no
> codes are reported. I know it works because we've connected it to other
> vehicles and it's reported codes on them.

in that case, look into the ignition switch. for your model year, there
was a recall because the switched burnt out - and symptoms were odd, but
left no code like you describe. it's particularly bad if you have a
heavy key ring. try using the key on its own and making sure you
manually return the key fully to the "run" position after cranking
rather than letting it turn back with just the spring. the spring's not
very strong, and particularly with a heavy key ring, the contacts only
partially engage, overheat, and burn out. and of course, replace the
ignition switch if this turns out to be the cause.

>
> "jim beam" <spamvortex@bad.example.net> wrote in message
> news:eoKdnYjw6vTYnb7bnZ2dnUVZ_v3inZ2d@speakeasy.ne t...
>> Jeremy wrote:
>>> No codes. I was able to get the engine light blink a few times. I
>>> was accelerating from stop, and the engine was hesitating, kind of
>>> boggin down. I floored it and after about two seconds the engine
>>> light blinked 5 or 6 times. After about 5 seconds the engine started
>>> responding properly and the engine like went away. No codes were saved.
>>
>> don't believe you! how did you try to read them?
>>
>>>
>>> "jim beam" <spamvortex@bad.example.net> wrote in message
>>> news:qe2dnazRB9sR94fbnZ2dnUVZ_vPinZ2d@speakeasy.ne t...
>>>> Jeremy Chapman wrote:
>>>>> Recently my 2000 civic sir (si in the US) has started to hesitate
>>>>> or stutter periodically. It happens between 1500 and 2500 rpm and
>>>>> I beleive it's usually when it's warm, and I'm accelerating from a
>>>>> stop. Any ideas what this could be?
>>>>
>>>> you'll almost certainly have codes stored in the computer. read
>>>> them, then report back.
>>>
>

 

Michael Pardee wrote:

> "Jeremy Chapman" <nospam@please.com> wrote in message
> news:W1gSh.45947$aG1.37731@pd7urf3no...
>
>>Recently my 2000 civic sir (si in the US) has started to hesitate or
>>stutter periodically. It happens between 1500 and 2500 rpm and I beleive
>>it's usually when it's warm, and I'm accelerating from a stop. Any ideas
>>what this could be?
>>
>
> For the experts: does this sound like distributor trouble?
>

Maybe but with modern cars with 'puters, it's hard to tell.

JT

(If it has a "Check Engine" light, I won't own it!)

 

I was finally able to get the check engine light to stay on and codes to be
saved. They're missfire codes and it turns out the misfire monitor requires
2 consecutive trips to trigger the DTC.

The codes are P0303 (Cylinder 3 misfire) and P1399 (Random/Multiple
cyclinder misfire).

Reported data is as follows:

Report#: 1
Report Date: 4-16-2007 (8:34 PM)
Vehicle Year: 2000
Vehicle Make: Honda
Vehicle Model: Civic (SIR)
Vehicle Engine Size: 1.6L
Vehicle VIN:
Vehicle License Plate:
Vehicle Mileage: 1230000

Stored:
P0303 Cylinder 3 Misfire Detected

Pending:
P1399 Random / Multiple Cylinder Misfire Detected

MIL ON
MisFire Monitor Complete
Fuel System Monitor Complete
Comprehensive Component Monitor Complete
Catalyst Monitor Complete
Heated Catalyst Monitor Not Supported
Evaporative System Monitor Complete
Secondary Air System Monitor Not Supported
A/C System Refrigerant Monitor Not Supported
Oxygen Sensor Monitor Complete
Oxygen Sensor Heater Monitor Complete
EGR System Monitor Not Supported

DTC for which Freeze Frame was Stored P0303
Fuel System 1 Status Open Loop - due to driving conditions
Fuel System 2 Status Not Supported
Calculated LOAD Value 94.12 %
Engine Coolant Temp 138.20 °F
Short Term Fuel Trim - Bank 1 0.00 %
Long Term Fuel Trim - Bank 1 -4.69 %
Intake Manifold Absolute Pressure 28.05 inHg
Engine RPM 3256 rpm
Vehicle Speed Sensor 32.93 mph
Intake Air Temperature 59.00 °F
Absolute Throttle Position 92.55 %




"jim beam" <spamvortex@bad.example.net> wrote in message
news:-vmdneQH79Vj7L7bnZ2dnUVZ_oKnnZ2d@speakeasy.net...
> Jeremy wrote:
>> I've got an obd2 code reader. It connects with a green light and no
>> codes are reported. I know it works because we've connected it to other
>> vehicles and it's reported codes on them.
>
> in that case, look into the ignition switch. for your model year, there
> was a recall because the switched burnt out - and symptoms were odd, but
> left no code like you describe. it's particularly bad if you have a heavy
> key ring. try using the key on its own and making sure you manually
> return the key fully to the "run" position after cranking rather than
> letting it turn back with just the spring. the spring's not very strong,
> and particularly with a heavy key ring, the contacts only partially
> engage, overheat, and burn out. and of course, replace the ignition
> switch if this turns out to be the cause.
>
>>
>> "jim beam" <spamvortex@bad.example.net> wrote in message
>> news:eoKdnYjw6vTYnb7bnZ2dnUVZ_v3inZ2d@speakeasy.ne t...
>>> Jeremy wrote:
>>>> No codes. I was able to get the engine light blink a few times. I was
>>>> accelerating from stop, and the engine was hesitating, kind of boggin
>>>> down. I floored it and after about two seconds the engine light blinked
>>>> 5 or 6 times. After about 5 seconds the engine started responding
>>>> properly and the engine like went away. No codes were saved.
>>>
>>> don't believe you! how did you try to read them?
>>>
>>>>
>>>> "jim beam" <spamvortex@bad.example.net> wrote in message
>>>> news:qe2dnazRB9sR94fbnZ2dnUVZ_vPinZ2d@speakeasy.ne t...
>>>>> Jeremy Chapman wrote:
>>>>>> Recently my 2000 civic sir (si in the US) has started to hesitate or
>>>>>> stutter periodically. It happens between 1500 and 2500 rpm and I
>>>>>> beleive it's usually when it's warm, and I'm accelerating from a
>>>>>> stop. Any ideas what this could be?
>>>>>
>>>>> you'll almost certainly have codes stored in the computer. read them,
>>>>> then report back.
>>>>
>>

 

Jeremy wrote:
> I was finally able to get the check engine light to stay on and codes to
> be saved. They're missfire codes and it turns out the misfire monitor
> requires 2 consecutive trips to trigger the DTC.
>
> The codes are P0303 (Cylinder 3 misfire) and P1399 (Random/Multiple
> cyclinder misfire).
>
> Reported data is as follows:
>
> Report#: 1
> Report Date: 4-16-2007 (8:34 PM)
> Vehicle Year: 2000
> Vehicle Make: Honda
> Vehicle Model: Civic (SIR)
> Vehicle Engine Size: 1.6L
> Vehicle VIN:
> Vehicle License Plate:
> Vehicle Mileage: 1230000
>
> Stored:
> P0303 Cylinder 3 Misfire Detected
>
> Pending:
> P1399 Random / Multiple Cylinder Misfire Detected
>
> MIL ON
> MisFire Monitor Complete
> Fuel System Monitor Complete
> Comprehensive Component Monitor Complete
> Catalyst Monitor Complete
> Heated Catalyst Monitor Not Supported
> Evaporative System Monitor Complete
> Secondary Air System Monitor Not Supported
> A/C System Refrigerant Monitor Not Supported
> Oxygen Sensor Monitor Complete
> Oxygen Sensor Heater Monitor Complete
> EGR System Monitor Not Supported
>
> DTC for which Freeze Frame was Stored P0303
> Fuel System 1 Status Open Loop - due to driving conditions
> Fuel System 2 Status Not Supported
> Calculated LOAD Value 94.12 %
> Engine Coolant Temp 138.20 °F
> Short Term Fuel Trim - Bank 1 0.00 %
> Long Term Fuel Trim - Bank 1 -4.69 %
> Intake Manifold Absolute Pressure 28.05 inHg
> Engine RPM 3256 rpm
> Vehicle Speed Sensor 32.93 mph
> Intake Air Temperature 59.00 °F
> Absolute Throttle Position 92.55 %


check the ignition componentry [distributor cap, rotor, leads and plugs]
and ensure its in good condition - if old, suggest replacement as a
precaution. random misfire on all cylinders can be multiple problems,
but misfire on #3 is injector or ignition componentry. injector cleaner
might be a good idea too.

>
>
>
>
> "jim beam" <spamvortex@bad.example.net> wrote in message
> news:-vmdneQH79Vj7L7bnZ2dnUVZ_oKnnZ2d@speakeasy.net...
>> Jeremy wrote:
>>> I've got an obd2 code reader. It connects with a green light and no
>>> codes are reported. I know it works because we've connected it to
>>> other vehicles and it's reported codes on them.
>>
>> in that case, look into the ignition switch. for your model year,
>> there was a recall because the switched burnt out - and symptoms were
>> odd, but left no code like you describe. it's particularly bad if you
>> have a heavy key ring. try using the key on its own and making sure
>> you manually return the key fully to the "run" position after cranking
>> rather than letting it turn back with just the spring. the spring's
>> not very strong, and particularly with a heavy key ring, the contacts
>> only partially engage, overheat, and burn out. and of course, replace
>> the ignition switch if this turns out to be the cause.
>>
>>>
>>> "jim beam" <spamvortex@bad.example.net> wrote in message
>>> news:eoKdnYjw6vTYnb7bnZ2dnUVZ_v3inZ2d@speakeasy.ne t...
>>>> Jeremy wrote:
>>>>> No codes. I was able to get the engine light blink a few times. I
>>>>> was accelerating from stop, and the engine was hesitating, kind of
>>>>> boggin down. I floored it and after about two seconds the engine
>>>>> light blinked 5 or 6 times. After about 5 seconds the engine
>>>>> started responding properly and the engine like went away. No
>>>>> codes were saved.
>>>>
>>>> don't believe you! how did you try to read them?
>>>>
>>>>>
>>>>> "jim beam" <spamvortex@bad.example.net> wrote in message
>>>>> news:qe2dnazRB9sR94fbnZ2dnUVZ_vPinZ2d@speakeasy.ne t...
>>>>>> Jeremy Chapman wrote:
>>>>>>> Recently my 2000 civic sir (si in the US) has started to hesitate
>>>>>>> or stutter periodically. It happens between 1500 and 2500 rpm
>>>>>>> and I beleive it's usually when it's warm, and I'm accelerating
>>>>>>> from a stop. Any ideas what this could be?
>>>>>>
>>>>>> you'll almost certainly have codes stored in the computer. read
>>>>>> them, then report back.
>>>>>
>>>
>

 

Thanks for the tips. I'll look into these. The thing I found odd was that
the behavior only manifests when I'm excellerating, usually from stop or if
I punch the gas, and the car has warmed up.

"jim beam" <spamvortex@bad.example.net> wrote in message
news:sI-dndP2N8510LnbnZ2dnUVZ_s-rnZ2d@speakeasy.net...
> Jeremy wrote:
>> I was finally able to get the check engine light to stay on and codes to
>> be saved. They're missfire codes and it turns out the misfire monitor
>> requires 2 consecutive trips to trigger the DTC.
>>
>> The codes are P0303 (Cylinder 3 misfire) and P1399 (Random/Multiple
>> cyclinder misfire).
>>
>> Reported data is as follows:
>>
>> Report#: 1
>> Report Date: 4-16-2007 (8:34 PM)
>> Vehicle Year: 2000
>> Vehicle Make: Honda
>> Vehicle Model: Civic (SIR)
>> Vehicle Engine Size: 1.6L
>> Vehicle VIN:
>> Vehicle License Plate:
>> Vehicle Mileage: 1230000
>>
>> Stored:
>> P0303 Cylinder 3 Misfire Detected
>>
>> Pending:
>> P1399 Random / Multiple Cylinder Misfire Detected
>>
>> MIL ON
>> MisFire Monitor Complete
>> Fuel System Monitor Complete
>> Comprehensive Component Monitor Complete
>> Catalyst Monitor Complete
>> Heated Catalyst Monitor Not Supported
>> Evaporative System Monitor Complete
>> Secondary Air System Monitor Not Supported
>> A/C System Refrigerant Monitor Not Supported
>> Oxygen Sensor Monitor Complete
>> Oxygen Sensor Heater Monitor Complete
>> EGR System Monitor Not Supported
>>
>> DTC for which Freeze Frame was Stored P0303
>> Fuel System 1 Status Open Loop - due to driving conditions
>> Fuel System 2 Status Not Supported
>> Calculated LOAD Value 94.12 %
>> Engine Coolant Temp 138.20 °F
>> Short Term Fuel Trim - Bank 1 0.00 %
>> Long Term Fuel Trim - Bank 1 -4.69 %
>> Intake Manifold Absolute Pressure 28.05 inHg
>> Engine RPM 3256 rpm
>> Vehicle Speed Sensor 32.93 mph
>> Intake Air Temperature 59.00 °F
>> Absolute Throttle Position 92.55 %
>
>
> check the ignition componentry [distributor cap, rotor, leads and plugs]
> and ensure its in good condition - if old, suggest replacement as a
> precaution. random misfire on all cylinders can be multiple problems, but
> misfire on #3 is injector or ignition componentry. injector cleaner might
> be a good idea too.
>
>>
>>
>>
>>
>> "jim beam" <spamvortex@bad.example.net> wrote in message
>> news:-vmdneQH79Vj7L7bnZ2dnUVZ_oKnnZ2d@speakeasy.net...
>>> Jeremy wrote:
>>>> I've got an obd2 code reader. It connects with a green light and no
>>>> codes are reported. I know it works because we've connected it to
>>>> other vehicles and it's reported codes on them.
>>>
>>> in that case, look into the ignition switch. for your model year, there
>>> was a recall because the switched burnt out - and symptoms were odd, but
>>> left no code like you describe. it's particularly bad if you have a
>>> heavy key ring. try using the key on its own and making sure you
>>> manually return the key fully to the "run" position after cranking
>>> rather than letting it turn back with just the spring. the spring's not
>>> very strong, and particularly with a heavy key ring, the contacts only
>>> partially engage, overheat, and burn out. and of course, replace the
>>> ignition switch if this turns out to be the cause.
>>>
>>>>
>>>> "jim beam" <spamvortex@bad.example.net> wrote in message
>>>> news:eoKdnYjw6vTYnb7bnZ2dnUVZ_v3inZ2d@speakeasy.ne t...
>>>>> Jeremy wrote:
>>>>>> No codes. I was able to get the engine light blink a few times. I
>>>>>> was accelerating from stop, and the engine was hesitating, kind of
>>>>>> boggin down. I floored it and after about two seconds the engine
>>>>>> light blinked 5 or 6 times. After about 5 seconds the engine started
>>>>>> responding properly and the engine like went away. No codes were
>>>>>> saved.
>>>>>
>>>>> don't believe you! how did you try to read them?
>>>>>
>>>>>>
>>>>>> "jim beam" <spamvortex@bad.example.net> wrote in message
>>>>>> news:qe2dnazRB9sR94fbnZ2dnUVZ_vPinZ2d@speakeasy.ne t...
>>>>>>> Jeremy Chapman wrote:
>>>>>>>> Recently my 2000 civic sir (si in the US) has started to hesitate
>>>>>>>> or stutter periodically. It happens between 1500 and 2500 rpm and
>>>>>>>> I beleive it's usually when it's warm, and I'm accelerating from a
>>>>>>>> stop. Any ideas what this could be?
>>>>>>>
>>>>>>> you'll almost certainly have codes stored in the computer. read
>>>>>>> them, then report back.
>>>>>>
>>>>
>>

 

Jeremy wrote:
> Thanks for the tips. I'll look into these. The thing I found odd was
> that the behavior only manifests when I'm excellerating, usually from
> stop or if I punch the gas, and the car has warmed up.

that's consistent, particularly with aged plugs. for spark plugs, the
sparking voltage depends on the gas pressure, composition, etc in the
cylinder. if the plug is leaking slightly [electrically] or the
electrodes are worn, it may spark at one cylinder condition, but not at
the other. same can go for aged distributor caps/rotors.

>
> "jim beam" <spamvortex@bad.example.net> wrote in message
> news:sI-dndP2N8510LnbnZ2dnUVZ_s-rnZ2d@speakeasy.net...
>> Jeremy wrote:
>>> I was finally able to get the check engine light to stay on and codes
>>> to be saved. They're missfire codes and it turns out the misfire
>>> monitor requires 2 consecutive trips to trigger the DTC.
>>>
>>> The codes are P0303 (Cylinder 3 misfire) and P1399 (Random/Multiple
>>> cyclinder misfire).
>>>
>>> Reported data is as follows:
>>>
>>> Report#: 1
>>> Report Date: 4-16-2007 (8:34 PM)
>>> Vehicle Year: 2000
>>> Vehicle Make: Honda
>>> Vehicle Model: Civic (SIR)
>>> Vehicle Engine Size: 1.6L
>>> Vehicle VIN:
>>> Vehicle License Plate:
>>> Vehicle Mileage: 1230000
>>>
>>> Stored:
>>> P0303 Cylinder 3 Misfire Detected
>>>
>>> Pending:
>>> P1399 Random / Multiple Cylinder Misfire Detected
>>>
>>> MIL ON
>>> MisFire Monitor Complete
>>> Fuel System Monitor Complete
>>> Comprehensive Component Monitor Complete
>>> Catalyst Monitor Complete
>>> Heated Catalyst Monitor Not Supported
>>> Evaporative System Monitor Complete
>>> Secondary Air System Monitor Not Supported
>>> A/C System Refrigerant Monitor Not Supported
>>> Oxygen Sensor Monitor Complete
>>> Oxygen Sensor Heater Monitor Complete
>>> EGR System Monitor Not Supported
>>>
>>> DTC for which Freeze Frame was Stored P0303
>>> Fuel System 1 Status Open Loop - due to driving conditions
>>> Fuel System 2 Status Not Supported
>>> Calculated LOAD Value 94.12 %
>>> Engine Coolant Temp 138.20 °F
>>> Short Term Fuel Trim - Bank 1 0.00 %
>>> Long Term Fuel Trim - Bank 1 -4.69 %
>>> Intake Manifold Absolute Pressure 28.05 inHg
>>> Engine RPM 3256 rpm
>>> Vehicle Speed Sensor 32.93 mph
>>> Intake Air Temperature 59.00 °F
>>> Absolute Throttle Position 92.55 %
>>
>>
>> check the ignition componentry [distributor cap, rotor, leads and
>> plugs] and ensure its in good condition - if old, suggest replacement
>> as a precaution. random misfire on all cylinders can be multiple
>> problems, but misfire on #3 is injector or ignition componentry.
>> injector cleaner might be a good idea too.
>>
>>>
>>>
>>>
>>>
>>> "jim beam" <spamvortex@bad.example.net> wrote in message
>>> news:-vmdneQH79Vj7L7bnZ2dnUVZ_oKnnZ2d@speakeasy.net...
>>>> Jeremy wrote:
>>>>> I've got an obd2 code reader. It connects with a green light and
>>>>> no codes are reported. I know it works because we've connected it
>>>>> to other vehicles and it's reported codes on them.
>>>>
>>>> in that case, look into the ignition switch. for your model year,
>>>> there was a recall because the switched burnt out - and symptoms
>>>> were odd, but left no code like you describe. it's particularly bad
>>>> if you have a heavy key ring. try using the key on its own and
>>>> making sure you manually return the key fully to the "run" position
>>>> after cranking rather than letting it turn back with just the
>>>> spring. the spring's not very strong, and particularly with a heavy
>>>> key ring, the contacts only partially engage, overheat, and burn
>>>> out. and of course, replace the ignition switch if this turns out
>>>> to be the cause.
>>>>
>>>>>
>>>>> "jim beam" <spamvortex@bad.example.net> wrote in message
>>>>> news:eoKdnYjw6vTYnb7bnZ2dnUVZ_v3inZ2d@speakeasy.ne t...
>>>>>> Jeremy wrote:
>>>>>>> No codes. I was able to get the engine light blink a few times.
>>>>>>> I was accelerating from stop, and the engine was hesitating, kind
>>>>>>> of boggin down. I floored it and after about two seconds the
>>>>>>> engine light blinked 5 or 6 times. After about 5 seconds the
>>>>>>> engine started responding properly and the engine like went
>>>>>>> away. No codes were saved.
>>>>>>
>>>>>> don't believe you! how did you try to read them?
>>>>>>
>>>>>>>
>>>>>>> "jim beam" <spamvortex@bad.example.net> wrote in message
>>>>>>> news:qe2dnazRB9sR94fbnZ2dnUVZ_vPinZ2d@speakeasy.ne t...
>>>>>>>> Jeremy Chapman wrote:
>>>>>>>>> Recently my 2000 civic sir (si in the US) has started to
>>>>>>>>> hesitate or stutter periodically. It happens between 1500 and
>>>>>>>>> 2500 rpm and I beleive it's usually when it's warm, and I'm
>>>>>>>>> accelerating from a stop. Any ideas what this could be?
>>>>>>>>
>>>>>>>> you'll almost certainly have codes stored in the computer. read
>>>>>>>> them, then report back.
>>>>>>>
>>>>>
>>>
>