dewd87

iTrader: (2)

Hi, I have a 2001 LM7 stock from a silverado in an 86' Regal. I have put about 1500 miles on it. It is still fuel injected, has a 255 walbro fuel pump, new plugs, new coil packs, and a new delphi maf. I don't have a regulator because I was led to believe it's in the fuel rails. Well anyways, it spits out 4 misfire codes, po352, po354, po356, and po358. It starts up fine cold, but when you start it when it's warm and has sat for awhile it takes about 5 seconds of cranking for it to start. After it starts it just doesn't run right, I don't think its running out of gas cuz it will rev up when you want it to but it just don't have any power and has died on me before. Once you start driving it works itself out though and can burn rubber like usual. I thought the coil packs were getting heat soaked but changing them didn't work. I want to get it dyno tuned but wanted to clear up theses trouble codes. I have tried starting it after unplugging the battery to see if it clears anything on the computer but that didn't work.

Any input would be appreciated

82lsx cutlass

Do you have a Corvette filter/regulator ?

v8envy

iTrader: (1)

You have to much fuel pressure and no return line, simply put a corvette FPR/fuel filter in line with a return...

dewd87

iTrader: (2)

I do have a return line though, but you still think the corvette fuel filter might help? I think the filter I have is a standard truck one but I know there is no regulator in it like the vette's.

v8envy

iTrader: (1)

well if you have a return then you don't have it regulated right it needs to be a 58 psi and the corvette fpr works perfect do a search on fuel system setups