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1998 Silverado 5.7 issues

Iceman6669

The Boss
Staff member
Ok Ive been having some issues with my dam truck recently. Heres what I know to be a fact, I am getting a P0300 code and only cyl 2 and 8 are showing miss fires. I have a new(ish) distributor, cap, rotor, plugs, and wires. I hooked HPT to it today and I am seeing that my LTFT and my STFTs look fine, along with what I would consider normal O2 readings. The one thing I saw that I thought was kinda odd was the Cam Retard timing. I was reading that it should be +/- 4* and I was seeing -15*. I am certainly going to correct that isssue. But my question is, would the CRT being off that much cause a miss fire on just those two cyl?


Truck will start and drive. But runs like total ****. Idle its MEH, but once under load and given any throttle, it shakes REALLY bad and will barely accel. It literally happened while driving it, but I had been having hesitation issues for the past few weeks/months. Nothing major until this happened. If I rev it while in park or N, it "pings" in the exhaust.
 


try the injector swap game yet?
Well, funny you mention that. Spider Injectors are on the list of possible issues. BUT I aint rippin the intake off just to swap them around. If I take the intake off I will be replacing them all. And thats like $300 just in injectors. So I wanna explore all other options first.
 
Yea Kinda?

LTFTs looked ok and I sprayed the intake down with carb cleaner back in OCT. when I was having an issue with the cap and rotor.
 


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