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car won't start when warm, fuel pump runs constantly why key is on position?
My uncle has a 95 Pontiac Sunfire, the car runs good, drives great. has a new computer, fuel pump, pressure regulator, fuel filter, plugs wires. alternator, battery. and a few other parts that are not important. it starts up fine when its cool, but after they drive it and it warms up to temperature, they go to cut it off and it won't start. they have to wait 20 or so minutes, then it will start again.
only thing I notice is when you turn on the key the fuel pump will run constantly, I'm assuming it never builds up pressure, so we replace the Regulator, still does it.
I'm really more curious then worried about it. I think they drive something like 40 miles a month in it so its not really important.
1 Answer
- Anonymous8 years agoFavorite Answer
I know it should not run constantly. It could be leaky injectors ( if fuel injected) dripping while the engine is off. Then it won't start. But I don't know if this engine has seperate injectors.
In any case you can call this a "hot-start problem" when you discuss it with mechanic. The whole system has to be checked over according to a manual.