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Originally Posted by frobotz
Well wit started yesterday. i did a fluid service with filter. Everything ops checked good lastnight. My wife drove it to wal mart today, It started shifting hard and the check engine light came on. Any thoughts before I take it to the shop?
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We just went through this battle. I know that it can be any number of things, but this is our story and what the solution was for us. (Keeping my fingers crossed ... it's been five days ... and no more problems.)
My daughter's 2001 Alero started dying (intermitently) at lights / stop signs / parking. It would start back up, but would straighten up on it's own and work fine for a while.
There were no reports from her regarding warning lights, but when my husband checked for codes it showed P0102. He tried checking for vacuum leaks, cleaning the K&N reusable air filter, cleaning the throttle body, and the Idle Air Controller. Each time, the car would run fine for a day or two, then start dying again.
The last time this happened, when it was started back up, it began the hard shifting thing and the engine light would come on. It was still throwing the P0102 code and my husband finally started checking things out with a volt meter. He discovered that there was a frayed wire (that broke when he jiggled it) in the connector plug that connects to the MAF sensor.
He was able to remove the broken piece of wire from the plug and re-solder the wire. His belief was that the wire bundle that was taped to another wire bundle and pulled so taut, that the pressure of some other cabling (being pushed on by the closed hood) caused enough stress to damage the wire.
Of course, after he struggled with these wires that barely had enough length to reach their destination, we did find out from a mechanic that we consulted with that there is a pig-tail connector that he could have purchased. But ... at that time, he just wanted it fixed and the auto parts stores were closed.
At least if any of those other wires are damaged, he will know where to look first when the next symptoms appear.
