Originally Posted by greenjeep05
Replaced the PCM drove 50 miles and the engine light came on an gave me error code P2098 - downstream fuel trim system to lean. Checked o2 sensors and tightened them really good ( they are new Bosch sensors) and had shop clear the code.
It looks like my 'guesstimate' was wrong. I just hate throwing big money at a potential problem, unless all other options were at least considered and anything that could be eliminated by a test was tested.
Usually if the PCM fails the capacitors go bad. That prevents the engine from firing until you leave the key in the ON position long enough for them to recharge.
Do you still have the old PCM? If you do swap it back in just for the heck of it. I wonder if it was the PCM or possibly a loose PCM plug....but then again you may not want to know that!