bigm-13
New Member
running rich and misfiring at higher speeds
'98 Tahoe c1500 four door. Vehicle runs perfect around town but when accelerating on to the freeway at more than half throttle at 60mph and above, it falls on its face. Starts misfiring badly with DTC for random misfire and runs extremely rich. You can smell the cat heating up and acts to be plugged.Llet off fuel and accelerate slowly it clears up and is fine. Have replaced fuel pump, rotor, cap, wires, plugs, and installed upgraded spider injection with injectors at end of tubes, exhaust after manifolds back. nothing has helped. could use some help.
'98 Tahoe c1500 four door. Vehicle runs perfect around town but when accelerating on to the freeway at more than half throttle at 60mph and above, it falls on its face. Starts misfiring badly with DTC for random misfire and runs extremely rich. You can smell the cat heating up and acts to be plugged.Llet off fuel and accelerate slowly it clears up and is fine. Have replaced fuel pump, rotor, cap, wires, plugs, and installed upgraded spider injection with injectors at end of tubes, exhaust after manifolds back. nothing has helped. could use some help.
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