The misfire algorithm may or may not pinpoint the right cylinders...
The misfire algorithm may or may not pinpoint the right cylinders...
will do, i got one in the shopCheck each coil and plug wire using something like this: KD2756.
03 Silverado 5.3 ECSB 4x4 Z71
Comp Cam 206/212 .515/.522 112 lSA, hardened rods with LS9 springs
2010 Tahoe VVT AFM 5.3
Stock for now
final update for the day:
tested and i have good spark. I pressure tested the coolant system and it checks out. Went on a test drive and it was chugging hard. couldn't get over 40 mph and it smelled like bad catalytic converter smell. Now that i think back about all the problems, a bad cat makes a lot of sence. we'll know for sure once they ummm...fall off accidentally
03 Silverado 5.3 ECSB 4x4 Z71
Comp Cam 206/212 .515/.522 112 lSA, hardened rods with LS9 springs
2010 Tahoe VVT AFM 5.3
Stock for now
You can remove the front O2 sensor and see if that frees up the engine...
If you have an exhaust pressure gauge you could measure the pressure due to the cat, should be no more than 1-2 psi.
edit: for example http://www.tooltopia.com/star-tu-29pb.aspx
Last edited by joecar; June 24th, 2010 at 07:55 PM.
removed the o2 before the cat and it ran so much better. i'm glad i finally found the culprit
03 Silverado 5.3 ECSB 4x4 Z71
Comp Cam 206/212 .515/.522 112 lSA, hardened rods with LS9 springs
2010 Tahoe VVT AFM 5.3
Stock for now
about 79000
03 Silverado 5.3 ECSB 4x4 Z71
Comp Cam 206/212 .515/.522 112 lSA, hardened rods with LS9 springs
2010 Tahoe VVT AFM 5.3
Stock for now