89 5.0...help im getting desperate - Ford Mustang Forum
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post #1 of 28 (permalink) Old 10-12-2013 Thread Starter
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89 5.0...help im getting desperate

Hello everyone! So heres the deal and I am begging for some help!

Car: 1989 5.0 gt40 heads, cobra intake and exhaust mani, b303 cam and a wet 100 shot. Basically it.

Problem: car has always ran well since I got it 5 yrs ago...I was n 3rd gear wot and spraying then all of the sudden she dies like she got unplugged. Pull over check under the hood. No fluids on the ground and didnt spit a plug, everything looked fine. She cranks over and thats it. I also notice that when it is cranking over thay the tach isnt jumping like it should...towed home.

What Iv done to try to fix, as well as a general tune up: new fuel filter ( pressure was a little low when testing it and fine after new one) new plugs, new ignition solenoid, new ignition coil, whole new distributor (thought the "cam sensor" was bad) and cap and rotor.

....still doing the exact same thing! Cranks and cranks but wont start..and the tach is still not jumping. Please help me!
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post #2 of 28 (permalink) Old 10-12-2013
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is your fuel pump coming on when u turn the key
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post #3 of 28 (permalink) Old 10-12-2013
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Have you run the codes?

What did the plugs look liked when you punt new ones in?

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post #4 of 28 (permalink) Old 10-12-2013
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yeah the 89 has a "ghost" in the machine in that regard...I had one years ago that would only start when it was over 70 degrees...it's some kinda ballast resistor in the electrical system causing the problem...I had to get rid of the car, one electrical nightmare after another...it was an old Highway Patrol car
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post #5 of 28 (permalink) Old 10-12-2013 Thread Starter
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Yes the fuel pump comes on and primes,, pressure was like 38psi on the fuel rail.
Plugs looked fine, nothing that stood out. Changed them to two steps colder when I added the n02.
and no I havent ran any codes YET...
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post #6 of 28 (permalink) Old 10-13-2013 Thread Starter
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Assuming the codes come back clean..what else could it b?
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post #7 of 28 (permalink) Old 10-13-2013
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what about the timing chain?


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post #8 of 28 (permalink) Old 10-13-2013 Thread Starter
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Could that cause it to die so suddenly?
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post #9 of 28 (permalink) Old 10-13-2013
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If your timing chain let go during a high RPM blast, it would have most likely been catastrophic and you wouldn't be cranking the engine over now.

Have you checked for spark? Is there power to the coil?

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Quote:
Originally Posted by Stinnett View Post
If your timing chain let go during a high RPM blast, it would have most likely been catastrophic and you wouldn't be cranking the engine over now.

Have you checked for spark? Is there power to the coil?
If timing chain let go there would be an audible difference while cranking that would be hard to be overlooked. If you're getting fuel I would next check for spark at the plugs and backtrack from there.


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Remove the dist. cap-crank it over and see if the dist. moves-that will tell if the timing chain went.


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post #12 of 28 (permalink) Old 10-15-2013 Thread Starter
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Rotor is spinning, didn't notice the whole dizzy movin..if it did how much would it move? Getting 12v to and after coil, new ignition solenoid which I also 12 volts...no spark at plugs. even went and got a spark plug tester today...nothing. ..maybe ignition control mod?
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post #13 of 28 (permalink) Old 10-15-2013 Thread Starter
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Ignition control switch*
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Probably the ignition control module or pip sensor in distributor.If the distributor is original ,I would replace it with a new Richporter replacement distributor as it probably has worn bearings anyway.
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Misread post and missed the fact that you replaced distributor.What type of replacement distributor did you use?
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