intermittent starting problem


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Old 05-03-06, 10:02 AM
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intermittent starting problem

99taurus 3.0L with 86k miles has failed to re-start 5or6 times in the last year.Always starts cold,restart failure has always occured during warm 75+temps,always after driven 5 plus miles and after a few successful restarts,getting a spark so I'm thinking fuel delivery problem.It starts after waiting 20 or more minutes.Fuel pump pressure checked out ok.by technician after original failure,but of course the car was starting ok,he couldn't duplicate start failure.no codes showing.Any ideas anyone?
 
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Old 05-03-06, 11:56 AM
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Hot no-start is often ignition related
You can confirm spark at the plugs during no-start?

And it's engine cranks but doesn't start right?

It very well could be the fuel pump is overheating and shutting off
Can you hook up a fuel pressure gauge to the schrader valve (bike tire looking valve) on the hard fuel line on top of the engine and check the pressure during no-start?

Or at least check for pump operation during no-start
Someone turns the key to "on" -but not "start"- while someone listens at the open gas fill cap
There should be a quick hummmm for a few seconds

Has the vehicle been run often with less than a 1/4 tank of gas?
Is there less than a 1/4 tank in it now?
 
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Old 05-03-06, 04:11 PM
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Engine cranks and there is spark at plugs during no starts and I don't drive on1/4 tank.Next no start I'd like to try to check pressure if I can locate shrader valve,about how much does a fuel pressure gauge cost?
 
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Old 05-03-06, 04:47 PM
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Does this car have a security system on it?
 
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Old 05-04-06, 06:25 PM
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Have you checked the electrical system? The wires could be the possible culprit. Make sure that it is properly connected to your car's power system. Further informations from Inner Auto can surely be of great help.
 
 

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