As a follower up question. Whenever I start the car, it runs poorly has no acceleration. It appears that depressing the Gas pedal causes worse performance. The muffler also runs with a puffing sound.I remove the upstream Oxygen sensor and perform a heat test on it an it seems to be OK. I also tested the downstream O2 sensor before I replaced it. This one did fail my heat test. Could the timing belt be causing this problem?
Original Question ( had $10 donation):
Vehicle - 1999 Subaru Forester AWD had the following check engine error codes: P0170, P0463, P0130, P0136, P0301, P0302, & P0303. I disconnect the battery, reconnect battery which clear the codes. Now the car seems to have no acceleration power. If I press the gas pedal the rpm jumps up to about 3000 rpm and drops to below 1000 rpm and the vehicle has no acceleration power. I changes the downstream oxygen sensor, the PVC valve and the 2 air filters, sprayed the MAF sensor with MAF cleaner to clean it but
Tuesday, December 13th, 2011 AT 5:35 PM