Originally Posted by LakevilleSSEi
I know that I need one because when the car is warm it won't restart with out cranking it for almost 20 seconds. And when the car is cold, after sitting all night or something, it will fire right up. Or if the car is warm and only been off for like 5 min, it will fire right up but otherwise it won't. I figure that it could contribute to my lean code and my idle problem. Except my idle'* so rough that it'* like my car is cam'd and jolts the whole car. A couple of times it'* actually rolled the car forward.
I would save your money and "borrow" a fuel pressure gauge.
HARD STARTING WHEN HOT "If your engine cranks for a long time before it fires up when hot, but starts fine when it'* cold, you may have a leaking check valve in the fuel pump. In order to start immediately, fuel needs to remain in the fuel lines. A faulty fuel pump check valve will allow the fuel to flow back into the gas tank leaving the air in the fuel lines. When you attempt to start the car, all the fuel lines need to be filled first to build up enough pressure to start injecting. This takes especially long when the engine is hot since the injection system runs leaner when hot. Find out if the fuel pump check valve is the problem by getting someone to clamp the rubber fuel line to stop the flow of fuel on the engine side of the fuel pump right when you turn off the engine. Wait 20 minutes, have your friend remove the clamp and immediately try to start your car. If it starts up right away, it'* the check valve and time for a new pump."