Join Date: Jul 2011
Car Year: 2007
Car Model: forester
Feedback Score: 0 reviews
Let the car run at idle so the computer can do a "hand shake" with the sensors....
This happened to me with an older car I had... run for ever fine, one day I had to unplug the battery and after I repluged the battery it run horribly... at the moment it did not make sense, since I did nothing to the engine it self.... well I let the car running to call a friend, after about 15 minutes I went back to my car, and it was running better, let it idle for a few more minutes and it fixed it self.
Asked a mechanic friend, and he said, it is common for older cars to loose the ECU MAPS once it is unplug.... in other words, the ECU doesn't know who is who, what sensor does what and so forth, so after you let it run, the ECU does a hand-shake with all the sensors, but it isn't a fast ECU, almost like an old 80086 processor against a pentium.... so let it run a bit more and it will fix it self.
hope it helped.