My 2002 Deville takes a long time to turn over when trying to crank

[bigboikw]

I have a 2002 Deville, when it sits for a while and I try to crank it, it takes a while to turn over, or I would have to crank it once then the second time it will start. I changed both of the crank sensors in the bottom front of the engine, and it still is doing the same thing.... can anyone please tell me what I need to change to fix it?

[winterset]

Do you hear your fuel pump prime when you turn the key to the on position without cranking? If the fuel pump relay is faulty, the oil pressure sensor provides a backup signal to energize the fuel pump. But if the backup has to kick in, it Requires a longer crank time.

[Cadillac Jim]

For more information, please run your OBD codes and post them here. Follow the link in my signature block for a Caddyinfo "how-to" page on running OBD codes.

[airmike]

Do you know how to check the fuel pressure regulator? If your statement "when it sits for a while" means after you drive it and wait 15 or more minutes, but less than say 12 hours, your fuel pressure regulator could be leaking gas into the engine, flooding it.

[Cadillac Jim]

Hard starting when hot is a symptom of a leaking FPR. The way to check for that is to pull off the hose from the FPR to the throttle body and see if you can smell gasoline; if you can, the FPR is leaking. Other FPR checks are not so easy, requiring a fuel pressure gauge and a vacuum gauge.

Hard starting when the car has been sitting a few hours is a symptom of fuel leakage in the FPR (to the gas tank return line) or a fuel injector (into the intake manifold). Hard starting when the car has been sitting is also a symptom of a bad fuel pump, or a bad fuel pump relay or other fuel pump actuating circuitry.

Run the OBD codes and post them here and we can tell if it's a fuel pump relay or electrical problem.

Leaking FPRs or injectors don't throw a code. Most electrical issues *do* throw a code.