I have a 1991 Subaru legacy that is getting around 14/15 mpg and won't pass an emissions test. The idle is ok after a cold start until it warms up a bit, then it starts surging more and more until it drops too low and dies. That also happens while moving. I was told by the previous owner that it has a bad ECU and it would cost 1200 for a mechanic to fix it all up, but ecus seem pretty easy to replace which makes me think there's something else involved. This issue does not seem related to temperature. Can you recommend some other tests or smaller repairs to do that would help me narrow down the problem?
Monday, December 27th, 2010 AT 8:39 PM