Did you check coils and modle
SOURCE: Is it difficult to replace
Well it all depends on the engine but no not really just dont break off one of the bolts or then............ your done. How do you know its the EGR most often he EGR code like a PO401 sets because the passages in the intake manifold are plugged with carbon you cannot clean them by removing the EGR VALVE if this is your problem contact me.
www.aceautomotive1.com
SOURCE: 04 grand prix shuts off
possibly the crank sensor, it will make the car shut down for no apparent reason. then the car will start after it sits for a bit.
SOURCE: 2003 grand am 3.4 code p0304
More likely a plugged injector as that code is specific to cylinder # 3 These engines are also very prone to failed intake manifold gaskets and stuck valve lifters. I think I'd start with a compression test, if that's good, go injector. If the compression is bad, you've got a can of worms. Hold off on the O2, I don't think it's related.
SOURCE: I have lost all my keys to my 04 grand prix, how
Goto any GM dealer and they can get you new keys cut for your car
Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/sean_54c3a3dc48a7773c
SOURCE: 04 Grand Prix oil leak
if it is not leaking then it is being burned by the engine, how many miles go by before you need to add oil?, if u are adding more than one quart every 1000 miles u have piston reing problems and or valve guide seal leaks. U won't see any smoke in most cases unless you are really going through the oil, like 1 quart every 300 miles.
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