Engine Misfire Due to Worn Valve Seat on Chevrolet Tahoe

The engine may develop a misfire due to worn valve seats. This fault will cause the Check Engine Light to illuminate. Our technicians tell us the misfire may or may not be felt while driving. They further recommend that both cylinder heads be removed and thoroughly inspected and repaired as necessary.

RepairPal Verified
Average mileage: 233,675 (233,675–233,675)
Engine affected: 5.7L V8
5 model years affected: 1996, 1997, 1998, 1999, more2000
6 people reported this problem
1 person shared problem details
1998 Chevrolet Tahoe- 5.7L V8233,675
Constant misfire on cyc 6 Done leak down test high leak removed head valve seat curved over edges preventing seating changed heads
Related Items:
Started with 3 codes. Misfire on 7, changed coil pack that issue cleared. Mass Air Flow code...
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/...
Engine Light on constantly. Codes Read at Auto Zone: P0449 EVAP purge/vent solenoid circuit con...
Check engine light is on & did a diagnostics which listed : defective fuel cap (which I switched out), EVAP canister broke, hose cracked or not connected, purge or vent solenoid defective, or vacuu...
engine misfires in random cylinders between 40mph and 80 mph -- jolts and shudders -- almost li...

Related Content