Quote:
Originally Posted by 010175
I have a 1999 GMC with 280,000 miles. No engine light on. I was going down the freeway and the engine light flashed 5 times and the engine quit. Left 4 ways on and the battery went dead. Towed home. Checked code and it was p0304. Because the battery was dead for a few days I don't know if it's from back then or just now with me trying to start it. The fuel presser is good and it holds presser. The engine try's to start I think. It stumbles and simi locks like it's trying to fire but not enought to keep it turning. fuse's look good, the ones I know of. Any ideas? I am a shade tree guy and don't mind throwing a few parts in it on the guest. Thanks Dave
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with a 1999 gmc suburban the fuel pressure need be key on eng off 62-65psi. it may start at a slightly lower pressure like 55psi maybe. p0304 is cyl4 miss fire. low fuel pressure can do that. if this is the only code and you have the pressure tested with a pressure gauge then this maybe a distributor problem/ICM etc.......... on these vehicles the distributors do fail @ 175K miles and higher. check for wobble of the rotor . my guess its the 350CU OBS...