Hello, my name is Nathan. I am new to the forum. I own a body repair shop (as a hobby and for extra income). I specialize in Corvettes and Trucks.
I recently purchased 2 - Tahoes at auction (1998 & 1997). Each have the service engine light on. One vehicle stumbles off idle then runs ok. The other (which I am focused on in this thread) idles well, but stumbles when the pedal is pressed quickly. Also, when the engine warms up, it will not pull a hill or accelerate over 20mph on level ground.
The OBD codes indicate a faulty (P0102) MAS and Cam Position Sensor. I erased the codes and replaced the MAS with a new unit from Chev..(I bought the CPS but have not installed it yet). Both faults remain and there is no change in performance. I didn't expect the CPS fault to go away, but I am stuck on the MAS fault. My Question: What else is in the MAS circuit could cause the fault to return (I checked connections at the MAS and swaped the MAS from the other Tahoe w/o luck).
This weekend, I will change the fuel filter, ERG valve, CPS & Spark plugs, but I know these changes will not help the P0102 fault.
Thank you for any advise on this,
Nathan