Service engine soon light
Service engine soon light 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!
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!
TECH Senior Member
Joined: Apr 2002
Posts: 6,080
Likes: 17
From: So.Cal.
Service engine soon light 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)...?
Was calibration edited for 40 lb/hr injectors (running at 58 psi rail pressure)...?
Does it have a K&N filter (is MAF dirty)...?
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