Engine Performance problem
1994 Mercury Tracer 4 cyl Front Wheel Drive Manual 220000 miles
Ever since I got the car, the car had a high idle when it was cold. When I started the car on a cold day and the RPM's dropped real low, the engine would sputter and then go up to 2000 RPM until it warmed up. If I did the same thing and tapped the gas right after I started it, the car would go up to 1500 RPM and stay there until the engine warmed up. When I first had high idle problems, the car would idle at 2000 RPM until I pushed the clutch in. Then the car would rev up and go to idle. All of a sudden the engine started idling at 2000 RPM whether it is cold or hot. Every 5-10,000 miles I had to change the spark plugs because they were hot. I checked the engine code and it said air temp sensor. I changed that and that didn't fix it. So my brother told me it was the IAC. That was not it. If I unhooked the IAC the engine would run at 750 RPM after it warmed up. I checked the computer again and it said MAF. At 168,000 miles, the seat fell out of the head and the head had to be machined.003 in, 2 new valves, new seat, and a new piston, and was rehoned. This was due to a vacumn leak. I found a vacumn leak to the e-vap can and I replaced the PCV valve and the rubber boot. Now the engine only goes up to about 3500 RPM and won't go any higher.
have the same problem?
Friday, September 19th, 2008 AT 9:32 PM