5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

ughh another problem

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Old 08-23-2007, 07:56 AM
  #21  
samseed101
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Default RE: ughh another problem

In your PM you mentioned that it stalls out and won't start when it gets warm. But once it cools down it will fire up and start / run normally. In that case, I'd also take a look at the Ignition Control Module.
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Old 08-23-2007, 09:37 AM
  #22  
bmennen07
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I will check out those 2 things now. I just checked the ignition switch and it looks perfectly fine. nothing melted, looks just like a brand new oneI have.

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Old 08-23-2007, 09:49 AM
  #23  
samseed101
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Default RE: ughh another problem

Here's a test for you to run. After it dies out and won't start, pull a spark plug from the engine but leave it attached to the wire and coil. Basically instead of having that plug installed in the head you just wait it out in the open. Now ground the plug to your engine (just take the exposed tip and gently press it against some solid metal part of your engine. Once you do this, have someone crank the engine and see if you see the spark plug fire.

If everything is working fine, you'll see the spark jump across the gap when the plug fires. If you don't see the spark by the time the engine has cranked a few times, then you know you have a problem somewhere within the ignition system. Now that could be anything from the actualk ignition itself all teh way down to teh wires, cap, rotor, distriburot, ICM, etc. But at least it will ease your worries about it being a fuel issue.

For comparison, wait for it to cool down and do it again when the car would nornally start and run. When you know the car will run, then you know you should see a spark. So if you pull a plug and do it when the car will run, then you know what to look for and you'll know that you're doing it right. So when you don't see a spark and when teh car won't start, then you'll know where the problem is...roughly
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Old 08-23-2007, 11:03 AM
  #24  
bmennen07
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Default RE: ughh another problem

thanks guys I always seem to buy the lemons[:'(]

I took it down to the parts store today to return the ignition switch and it ran fine, but once I shut if off at Napa and came back out it wouldnt start. It just about did then it quit. It would only crank but not start so im sure its heat related. I waited 15 min and it started so I drove home. I would try the spark plug trick but my car always starts at home. (figures). Ill check the ignition control module...if only I could find it.
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Old 08-23-2007, 12:00 PM
  #25  
samseed101
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Default RE: ughh another problem

So let ir run at home until you stall it. Then when you see that it won't start, then pull the plugs and see if you get a spark.
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Old 08-23-2007, 12:27 PM
  #26  
mattdel
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Default RE: ughh another problem

personally i prefer one of these, so i dont get 50,000 volts running through me



about $7 at your local parts store, you clip it over a spark plug and into its corresponding wire. its an inline spark tester. has a little bulb that lights up when you have spark.
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Old 08-23-2007, 02:35 PM
  #27  
bmennen07
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ok, I took out the ignition control module and tried to start it. It acted just like it did when it was in. So I put it back in and it still wouldnt start[:@]. I am going to do the spark plug check.

Im just wondering why it wont start now even tho the car is cold and I put the module back in. Do u think the module is the problem?

thanks.
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Old 08-23-2007, 02:42 PM
  #28  
samseed101
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Default RE: ughh another problem

ORIGINAL: mattdel

personally i prefer one of these, so i dont get 50,000 volts running through me



about $7 at your local parts store, you clip it over a spark plug and into its corresponding wire. its an inline spark tester. has a little bulb that lights up when you have spark.
Wuss Do it the real way. Just like the way you check to see what the fluids are...taste!
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Old 08-24-2007, 03:43 PM
  #29  
bmennen07
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Default RE: ughh another problem

The problem is fixed it was the ignition control module located under the air intake. Replaced it and now it works perfect.
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