2001 Saturn L300 car starts when cold but not when warm

SOZAY33

MEMBER
2001 SATURN L300
6 CYL
FWD
AUTOMATIC
11,500 MILES

Hello,
I own a L300 saturn that when the engine is cold will start every time, but when it is warm does not start. I have been driving home from work and stop to run in to cvs for 5 minutes and when I come out to start the car it does not start. I have also been driving two times where the engine will stall and I have to pull it over and wait till the engine gets cold.

I have checked the engine temp sensor and it is good. I was thinking it could be fuel pump or ingition module is bad. Any suggestions or information would be much appreciated, thanks.

Justin Michigan

3 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Do you have a check engine light while its running?

But when it is warm does not start.

You need to check what's missing fuel or spark when its warm -Try doing below and see what happens and comeback with some results

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Sunday, December 21st, 2008 AT 4:55 PM

SOZAY33

MEMBER
3 POSTS

Yes the check engine light is on while running. Fuel pump comes on when engine starts but it might be the fuel pressure regulator. Any recomendations on the correct psi for the fuel regulator. There seems to be alot of people with the problem but no one has found a specific solution

thanks justin

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Sunday, December 21st, 2008 AT 6:53 PM

RASMATAZ

MECHANIC
75,992 POSTS

Get a starting fluid or ether and spray into the carb or the throttle body on an EFI. Did it start and die? If not disconnect a sparkplug wire or 2 and ground it to the engine -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs, distributor pick-up coil, ignition control module, cam and crank sensors- Note: If it doesn't apply disregard it

If both fuel and spark is present-check the valve and ignition timing, this will lead you to problems with compression and valves opening and closing at the wrong time/broken or jumped timing belt/chain

3.0L

"J" Body 39-49 psi (2.7-3.4)
"V" Body 40-46 psi (2.8-3.2)

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Monday, December 22nd, 2008 AT 12:31 AM