codes as well


also add some sea-foam to the gas tank

 

Ok well cheak this out, I ran the code and it came up egr which really dosent explain much

 

Cycle thru the tank of gas you have now and see if it clears up. Will it free rev past 4500rpm with out acting up? You said it has a aftermarket MAF try and unplug the MAF and see if it gets any better. I'm not far for you and off on monday if you cant get things sorted out.

 

It will rev past that when its not under load but its not how it how should. Ive gone through 3 tanks of gas and no change the only other things i could think of were the injectors or the plugs and wires.

 

Try driving it with the MAF unpluged, the PCM feeds mainly off of that at WOT, if you unplug it and go into speed density and nothing changes then at least you know its not the aftermarket MAF.

 

a bud of mine had an lt1 with the same problem, he got some intake cleaner and it worked. Just disconnect your intake down to the throttle body and fire up your beast. Spray the cleaner into it and rev the car up. Use the whole can, and get ready for tons of black shit to spray out the back. GL

 

sounds like typical hi side electrical in the opti going bad. compare the resistances and voltages at the opti with what GM specifies.

also, ignore eautocad.

 

is that bad for the motor? please explain i would like to know because im considering it on my ls1

 

lol....

my lt1 was giving problems similiar to that... it ended up being the sock (filter) on the internal fuel pump.... I would go through everything else that they say *first* like opti, because my fuel pump was not easy to get to.. and no fun at all...

my car got so bad after running for a little while it would start to break up even at idle.. if yours isnt doing that and only breaking up when reving it probably is opti...

 

umm ur throttle body could be all gunk up or might just need to do a full tune up..its about 800$ in parts and 3 to 4 hours to do..have fun..