silverado2001

To start the truck was running great for about 4 months after my tune but just recently it's started popping back or loading raw fuel in the exhaust. Checked coils changed wires no real change. Has long tubes and I've been reading on the issues this may cause with primary o2 sensors. Anyone had this issue? I don't know if I'm loading bank 2 or what's causing the backfire. Lots of money in build don't want to cause catastrophic failure or wash a ring by over fueling. Any help will be greatly appreciated.

silverado2001

Reset codes random cylinder misfire code dropped but still popping through exhaust. Under full throttle performs as if nothing is wrong. Only loading at idle and lower rpms. Switching bank 2 sensor 1 in the morning but they ones in it are new from build. Hope it's the problem. Cam is pretty choppy but can't audibly hear a misfire hope I'm done with the misfire codes.

dmelvin

iTrader: (8)

Let us know how it goes. I believe if the O2 is bad, it could be causing your misfires and backfires if it's commanding more and more fuel until the computer goes into open loop due to the fault.

As far as the throttle position sensor code. May try to just change the sensor.

silverado2001

Hell I never even thought about the tps this could be causing my problem also. Stopped at the misfire and the
O2 code. If tps isn't reading properly it could also be my low end over fueling problem. Thanks for the reply tps is only twenty bucks or so I'll just throw a new one on. It's still original equip from before the build.

Gordy M

iTrader: (2)

If you have access to a good scanner, set it to read missfires by cylinder,O2s, TPS, etc. It is possible that you have a spark plug go bad, if its a bank, could be O2, etc. At least you will start to analyze where the problem comes from after that the solution usually is readily apparent.

So.cal Wrk Sled

I just had a issue kinda like what your saying, trk would not idle, sounded really rough and was stalling kicking codes too. Found 1 of the fuses for heat02sensors blown. Ck the fuse block under hood for heat 02 sensors. Good luck!