hoonigann

iTrader: (3)

Hi all,

I installed new e3.54 spark plugs on my 2002 SS. The car was not burning the entire mixture before and there would be plumes of smoke out the exhaust at WOT. So after I changed the plugs, the car back fired under load which i kinda expected. however, the second day, the car backfired more and surged and hesitated on low rpm, high throttle input situations. I thought it was one of the sensors acting up. so i tore apart the airbox and maf to make sure there were no leaks. I checked the EGR for leaks and I ran the car with the MAF unplugged for a few seconds. this seemed to help and now there are no more backfires or hesitations. However, the service engine soon light comes on at high RPM in 4th or 5th gear BUT IT DOESNT REGISTER ANY CODES. Im at a total lose. Please let this PCM noob

Thanks!

hoonigann

iTrader: (3)

the O2 sensors are also reading 0.9 volts consistently at WOT
the car also has ls6 heads and cams and 40 lbs injectors

joecar

What color is the smoke, and how much smoke is it...?

Was calibration edited for 40 lb/hr injectors (running at 58 psi rail pressure)...?

Does it have a K&N filter (is MAF dirty)...?

joecar

Does SES/MIL flash (misfires detected) or is it on steady...?

What scantool are you using to check for DTC's...?

hoonigann

iTrader: (3)

Smoke is gray not blue at all. And it's not that bad, it's only noticeable for 1-2 seconds right after high rpm and fast shift

hoonigann

iTrader: (3)

I have a shop checking the fuel calibration cuz I have no clue. Brand new fram filter and maf is clean

hoonigann

iTrader: (3)

The light flashes so it's a misfire

hoonigann

iTrader: (3)

Problem solved. My car didn't like the e3 spark plugs