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Old 08-20-2005, 18:01   #1 (permalink)
dorun64@hotmail.com
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1994 Mustang Not Starting No Spark

I hope someone can help. My wife had a 94 Mustang that we were
storing. When we parked it everything was running fine. Later, we
went back to start it up and no luck. It turns over fine just no fire.
Gas pump is working and I have tried a new ignition coil. Any other
Ideas
Thanks
Kevin

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Old 08-20-2005, 22:02   #2 (permalink)
cprice@here.com
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Re: 1994 Mustang Not Starting No Spark

dorun64@hotmail.com wrote:

> I hope someone can help. My wife had a 94 Mustang that we were
> storing. When we parked it everything was running fine. Later, we
> went back to start it up and no luck. It turns over fine just no fire.
> Gas pump is working and I have tried a new ignition coil. Any other
> Ideas
> Thanks
> Kevin
>


Pull a plug and see if you have spark?

Be sure you have gas - get a fuel pressure gauge and check the pressure
at the schraeder valve on the engine fuel rail. You didnt mention engine
size, but afaik, all 94's had electric fuel pump.

This sounds like the fuel pump cutoff switch has been triggered, but
you say you are sure you have gas. How sure are you?
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Old 08-21-2005, 11:02   #3 (permalink)
Backyard Mechanic
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Re: 1994 Mustang Not Starting No Spark

"cprice@here.com" <cprice@here.com> wrote in
news:43080604.2090805@here.com:

> dorun64@hotmail.com wrote:
>
>> I hope someone can help. My wife had a 94 Mustang that we were
>> storing. When we parked it everything was running fine. Later, we
>> went back to start it up and no luck. It turns over fine just no
>> fire.
>> Gas pump is working and I have tried a new ignition coil. Any other
>> Ideas
>> Thanks
>> Kevin
>>

>
> Pull a plug and see if you have spark?
>
> Be sure you have gas - get a fuel pressure gauge and check the
> pressure
> at the schraeder valve on the engine fuel rail. You didnt mention
> engine size, but afaik, all 94's had electric fuel pump.
>
> This sounds like the fuel pump cutoff switch has been triggered,
> but
> you say you are sure you have gas. How sure are you?


If he hears the fuel pump run, that means the inertia sw or relay isnt
the problem.. still might be no pressure, however.


BUT FIRST!!!!
Assuming 5.0 here as he says he 'replaced coil'
- dont worry... the coil replacement wasnt totally wasting money, open
frame coils have a definite 'lifetime'.

TACH!
(get this in your heads kiddies!)
What does your tach do when you switch key on?
- tach bounce with key on means coil has power through it, DOES NOT mean
coil is GOOD, could still be shorted or arcing internally but it's
getting power.

Then:
What does it do while cranking?
- Tach bounce while cranking means there is a switching signal from the
distributor. Could still be 'off' time but there should be some
indication of firing.

Note it is NOT going to bounce while cranking if it's not getting power.

Stored how long? Gas ages, you know.. esp if you havent used sta-bil or
the like. If more than a year, add fresh so that it's at least 50%
fresh.

Adjust cranking gas flow.

If it doesnt start as normal, foot off the pedal; THEN try pumping the
accel and see if it fires or tries to.
- symptom when not getting enough fuel
Sometimes rubber tubing from FP to pickup dteriorates and wont pull gas
from the pickup

With no luck there.. wait a half hour or so and try with your foot to the
floor and see if it wants to start.
- symton when getting TOO MUCH fuel
Check a plug, if wet, suspect Fuel press reg, or ECT sensor.
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Old 08-21-2005, 12:01   #4 (permalink)
Backyard Mechanic
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Re: 1994 Mustang Not Starting No Spark

Backyard Mechanic <pettyfog@yaywho.com> wrote in
news:Xns96B98E20BA61pettyfogery@207.115.63.158:

> Check a plug, if wet, suspect Fuel press reg, or ECT sensor.
>
>


OR old, bad gas.. as i said above that.
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Old 08-21-2005, 18:01   #5 (permalink)
Clark Kent
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Re: 1994 Mustang Not Starting No Spark


Or it could be your TFI Module. It is what is responsible for sending
current to the coil. If you take a test light and ground one end and
test one of the wirers at the coil when turning it over at the same
time it should flash on and off. If you have no power to the coil then
chances are it is the TFI. Since you say you have a 94 it is not
mounted on the side of the distributor like the 86-93's 5.0's . So ask
a dealer or someone here in the group at to where it is located on the
95-95 cars. I know the pull out spout is located at the air filter.
Good luck. Should be a easy fix.



On 20 Aug 2005 17:35:52 -0700, dorun64@hotmail.com wrote:

>I hope someone can help. My wife had a 94 Mustang that we were
>storing. When we parked it everything was running fine. Later, we
>went back to start it up and no luck. It turns over fine just no fire.
> Gas pump is working and I have tried a new ignition coil. Any other
>Ideas
>Thanks
>Kevin


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Old 08-22-2005, 07:01   #6 (permalink)
dorun64@hotmail.com
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Re: 1994 Mustang Not Starting No Spark

I should have been clearer. It is the 3.8L. Are the TFI and ICM one
and the same? The car is about 200 miles away being stored in a barn
at my parents farm so it hard to work on very often. I remeber
changing what I believed to be the ICM which was located on the
pasenger side fender. It had two small screws attaching and I believe
a wiring harness with four wires. I'll be going back in about two
weeks so this diagnosis info is good.
It has the distributorless ignition, so is all this info still
relevant?
I checked the fuel cutoff switch and it is not triggered.
I checked for spark after pulling of the wires, none.

I really appreciate all the input because I hate to see it just sitting
there.
Thnaks
Kevin

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