[Maty]

Hi, I recently bought a '01 Grand Prix with a 3.1 V6. When I bought it I noticed a longer than usual crank time, about 4-6 seconds, and the guy that I bought it from (a mechanic) told me that he took out the fuel screening from the fuel pump (it was a new pump, he just got "bad gas") and put a one-way valve instead, because of some clogging, and said that that was the problem. I got a fuel screen from a junker since they don't sell it separately and already put it in place, but the problem is still there, a long crank time.

I checked the fuel pressure regulator, the test where you take the hose out while running and look for any leaking and nothing happened. I'm assuming it's a fuel problem and not air or spark, but I am really not sure.

The problem happens when I leave the car over night or just sitting for a while. Also putting the key in the "on" position and letting it sit there for couple of seconds before starting doesn't cure the problem. Please help me out. Any help is appreciated, thanks.