I did search on rough idle, and stalling etc. but have not found problem similar to mine.
This happened couple months ago, but went away. Now the gremlin is back.
When I first start the car, it idles fine at first, but as the idle slows it begins to "cut out". Just like the key was turned off/on quickly. If I give it a tad of throttle the "cut" goes away. The car accelerates normally and runs fine as long as rpm is up and/or there is some load.
If idling with the clutch pushed in, it will run at approx 1000 rpm, then 'cut' and drop to 500 or so, and continue to do this every several seconds. It completely stalled out twice at traffic lights.
When this happened a couple months ago, the 'cut' would stop when it fully warmed up. Today it continued even after warm.
'91 Turbo, basically stock. ECU was replaced before I bought it.
Any ideas?
Update 1/30/2006:
The problem seemed to disappear after replacing the ECU caps, but then came back after several weeks. . . . When it came back however, it was much more consistent in how it acted. . . . I think originally I had a issue with both the ECU and ISC, then weeks later just an ISC issue. (see post #26)
This happened couple months ago, but went away. Now the gremlin is back.
When I first start the car, it idles fine at first, but as the idle slows it begins to "cut out". Just like the key was turned off/on quickly. If I give it a tad of throttle the "cut" goes away. The car accelerates normally and runs fine as long as rpm is up and/or there is some load.
If idling with the clutch pushed in, it will run at approx 1000 rpm, then 'cut' and drop to 500 or so, and continue to do this every several seconds. It completely stalled out twice at traffic lights.
When this happened a couple months ago, the 'cut' would stop when it fully warmed up. Today it continued even after warm.
'91 Turbo, basically stock. ECU was replaced before I bought it.
Any ideas?
Update 1/30/2006:
The problem seemed to disappear after replacing the ECU caps, but then came back after several weeks. . . . When it came back however, it was much more consistent in how it acted. . . . I think originally I had a issue with both the ECU and ISC, then weeks later just an ISC issue. (see post #26)