I was cruising along at 45mph and my 94 excel shut off without
warning. It would not start back up, but cranked strong. I eliminated
lack of fuel as a possible problem. I checked for spark. No Spark.
After further investigation I discovered a blown MPI fuse. I replaced
the fuse, the car tried to start but the MPI fuse blew again. I can't
move the car to get a diag. I think its either the coil or the MPI
relay. Can anyone help? What would make the MPI fuse blow?

 

Look for wiring shorted to the body of the car. Power from this fuse goes
through several harnesses and powers several items, so you'll need to work
at narrowing down the short. The fuse controls power to the ECM, the ECM
relay, fuel pump, fuel injectors, purge solenoid, EGR solenoid, and heated
oxygen sensors.

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On Aug 25, 5:55 pm, "hyundaitech" <notpub...@not.public.com> wrote:
> Look for wiring shorted to the body of the car. Power from this fuse goes
> through several harnesses and powers several items, so you'll need to work
> at narrowing down the short. The fuse controls power to the ECM, the ECM
> relay, fuel pump, fuel injectors, purge solenoid, EGR solenoid, and heated
> oxygen sensors.
>
> --
> Message posted usinghttp://www.talkaboutautos.com/group/alt.autos.hyundai/
> More information athttp://www.talkaboutautos.com/faq.html

I tried disconnecting the alternator to see if bypassing it might
eliminate it as a problem, the fuse did not blow this time & the car
started briefly, then I heard a clicking noise under the dash & it
shut off. I re-connected the alt. and it did the exact same thing. I
tried starting 3 times with the same result. I was able to pin-point
the clicking noise. I think it is the main relay, but I have to check
the manual to be sure. Could it be bad? My Wife bought this car new 14
Yrs. ago and it has been an excellent machine. It only has 120,000
miles on it so I plan on keeping it for a long time to come. I will
continue to research.

 

On Aug 25, 7:50 pm, 14yearexcelowner <eight...@gmail.com> wrote:
> On Aug 25, 5:55 pm, "hyundaitech" <notpub...@not.public.com> wrote:
>
> > Look for wiring shorted to the body of the car. Power from this fuse goes
> > through several harnesses and powers several items, so you'll need to work
> > at narrowing down the short. The fuse controls power to the ECM, the ECM
> > relay, fuel pump, fuel injectors, purge solenoid, EGR solenoid, and heated
> > oxygen sensors.
>
> > --
> > Message posted usinghttp://www.talkaboutautos.com/group/alt.autos.hyundai/
> > More information athttp://www.talkaboutautos.com/faq.html
>
> I tried disconnecting the alternator to see if bypassing it might
> eliminate it as a problem, the fuse did not blow this time & the car
> started briefly, then I heard a clicking noise under the dash & it
> shut off. I re-connected the alt. and it did the exact same thing. I
> tried starting 3 times with the same result. I was able to pin-point
> the clicking noise. I think it is the main relay, but I have to check
> the manual to be sure. Could it be bad? My Wife bought this car new 14
> Yrs. ago and it has been an excellent machine. It only has 120,000
> miles on it so I plan on keeping it for a long time to come. I will
> continue to research.

The Relay in question is on the far left side under the dash &
fastened with a screw.

 

That is indeed the ECM relay, and it could indeed the problem, but once the
fuse blows, regardless of why, the relay will click off, causing a the
clicking you've already heard.

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On Aug 26, 7:38 pm, "hyundaitech" <notpub...@not.public.com> wrote:
> That is indeed the ECM relay, and it could indeed the problem, but once the
> fuse blows, regardless of why, the relay will click off, causing a the
> clicking you've already heard.
>
> --
> Message posted usinghttp://www.talkaboutautos.com/group/alt.autos.hyundai/
> More information athttp://www.talkaboutautos.com/faq.html

I went on the Hyundai web site but I could not find an ECM relay. I
was able to enter the part # and it came up as a "power relay". Is the
ECM relay & the power relay the same thing!?

 

Nearly any relay can be described as a power relay. If my memory serves,
the ECM relay has about 6 to 8 terminals.

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On Aug 30, 11:48 pm, "hyundaitech" <notpub...@not.public.com> wrote:
> Nearly any relay can be described as a power relay. If my memory serves,
> the ECM relay has about 6 to 8 terminals.
>
> --
> Message posted usinghttp://www.talkaboutautos.com/group/alt.autos.hyundai/
> More information athttp://www.talkaboutautos.com/faq.html
I believe it is indeed the ECM relay, it has 8 terminals and all my
research supports this conclusion. I'll check it if I can but I'm
pretty sure the ECM relay is not supposed to "rattle
" . Thanks so much for your in-put!