Have this 08 silverado 4.8 that has this intermittant issue where the desired throttle goes up and down and the actual throttle responds accordingly. Spark, and fuel follow this when it happens. It's not in this log. But we have verified the APP's are smooth and steady when this occurs.
It has had a small cam put in it, stall converter, cai and lt headers. It has been going along ok until this issue. It looks as if there may be a torque reduction event taking place? But I thought we had that stuff turned off. Maybe we missed something? Maybe there's a problem elsewhere.
There was a TSB to replace the TPS, which we did, but did not remedy the situation.
Reply With Quote