Fox Mustangs 1979-1993 Mustangs Member Tech & Restoration Discussion

Starting problems

Old Dec 19, 2011 | 12:20 PM
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Starting problems

I jaw a 91 fox body that starts when it wants to and runs great when is running new to the ford gang any suggestions?
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Old Dec 20, 2011 | 04:49 AM
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Moving to 'Fox' section, but will leave a link for a day . . .

Also, I don't understand your question. . . (I'm guessing spam!)
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Old Dec 20, 2011 | 07:08 AM
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Uhmm yeah impossible question to help with not enough info. does it do it when its hot or cold, sitting overnight or after driving it and trying to restart it. need much info.
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Old Dec 22, 2011 | 08:49 AM
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After I run it it won't start back up like it is vapor locked an hour later it will sitting over night it won't start in the morning little either and she fires right up
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Old Dec 22, 2011 | 06:48 PM
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How is the compreshion, after it warms up does it loose compreshion. I had a motor do the same thing... New boar and pistons fixed the prob for me. I had 100lb cold and 50lb hot so if i shut it off it would never start till it cooled off... Just a thought.....
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Old Dec 23, 2011 | 06:55 AM
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could very well be a fuel pump on its way out. doesn't sound like a spark problem but more fuel. what is the fuel pressure at idle and under a load.
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Old Dec 27, 2011 | 08:30 AM
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I have seen TRI modules go open circuit when hot and fire up when cold. When the vehicle does not offer to start check for fire at the plugs to elliminate this possibility.

Also check to see if you have fuel pressure at the shrader valve when you have a no start condition. This will tell you if you have a fuel related problem.

Check coil and distributor cap for corrosion on the tower teminals. Another cause if it if spark related could be a pick up coil going open circuit once it is hot. Again verify for spark when engine is a no start.

Joe
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Old Dec 28, 2012 | 12:36 PM
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Another question if you have very little fuel coming out the shrader valve and I mean a drip, is that mean its a fuel pump problem?
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Old Dec 28, 2012 | 12:52 PM
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Originally Posted by djsmillions
Another question if you have very little fuel coming out the shrader valve and I mean a drip, is that mean its a fuel pump problem?

If it is just tribble w/o a pressurized squirt then there could be an issue. it will loose some of it pressure has it sits and after you press the schrader valve also. use a gauge and do a key on test.

also shot an answer in the sn95 V6 section.

Last edited by skunk21; Dec 28, 2012 at 12:53 PM.
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