98 Grand Prix - Hard Starting and Higher Than Normal Fuel Consumption

[birar]

Originally Posted by FCPorto

Hello, I own a 1998 Grand Prix GTP. I've owned this car since new and have taken the best care possible with this car. The car has not given me any issues except for now. About a week ago it became hard to start when cold. This car typically starts right on ignition. Now, when it's cold, it cranks over for at least 2-3 seconds. What I've done so far is replaced the wires and spark plugs, thinking that maybe the wires (original) were the culprit. No go. Same issue. The car runs perfectly fine otherwise, however I've noticed quite higher fuel consumption. I'm slightly at a loss. I've done some researching on these forums but haven't really acquired a sense of what it could be. If anyone can provide some direction regarding what to check, that would be great. I'm suspecting a fuel related issue, however I'm unclear. Thanks in advance for any help.

from previous problems wit my GTP i figured it was the check valve in the fuel pump assembly on mine. starts great now, basicly its a one way valve and its letting gas go back in the tank when it sits and when u start it cold it has 2 prime the fuel system, hit ur shrader valve after it sits awhile it should spray alittle if it bearly trickles that would be my guess

[2lazy]

Having seen your issues, hate to mention yet another thing to check, but I have just overcome such issues with my lesabre and riviera. Turns out both had pinhole air leaks in the fuel lines. The holes were not big enough to leak much fuel or even cause a smell... I would check those next.