- Joined
- May 18, 2008
- Messages
- 1,510
- Reaction score
- 368
- Points
- 83
- Location
- Vancouver area BC Canada
- Vehicle Year
- 92 & 83 project
- Make / Model
- Ford
- Engine Type
- V8
- Engine Size
- 4.0L 302
- Transmission
- Automatic
Background: Purchased a 92 4x4 that was ran hard then parked for a year. It was cheap as it needed new brakes, 7 U-joints, and had a serious miss in the engine. dented drivers front 1/4. still needs work but fixed all that.
Engine: fixed by pulling it out (260,000 kms) and replaced with 1 from our running 94 Explorer (screwed trans) and time to move on from it. Under 180,000 kms on this engine. very clean and strong runner.
Problem: the old engine had a high idle at 1000 RPM. no vacuum leaks. I chalked it up to the badly missing engine and didn't concern myself with it knowing I would be swapping it out anyway.
Now after the swap. Swapped out all the components that were on the running engine from explorer. did not remove anything. out with old, in with new. however the high idle is still there, been driving 2 weeks now after the swap. Swapped the ecm today from a good condition parts truck thinking maybe there was something wrong there. didn't change anything.
What could it be that is giving high idle? Only thing I changed was I deleted the air-con, and deleted the egr BS that went to the exhaust manifold that was in the explorer, used a good intake from another good engine i had sitting in a parts truck.
Checked for a vacuum leak in the booster. all ok there, no vacuum leaks anywhere in the engine bay.
is there a wire harness sensor that i need to look at?
thanks for reading.
Engine: fixed by pulling it out (260,000 kms) and replaced with 1 from our running 94 Explorer (screwed trans) and time to move on from it. Under 180,000 kms on this engine. very clean and strong runner.
Problem: the old engine had a high idle at 1000 RPM. no vacuum leaks. I chalked it up to the badly missing engine and didn't concern myself with it knowing I would be swapping it out anyway.
Now after the swap. Swapped out all the components that were on the running engine from explorer. did not remove anything. out with old, in with new. however the high idle is still there, been driving 2 weeks now after the swap. Swapped the ecm today from a good condition parts truck thinking maybe there was something wrong there. didn't change anything.
What could it be that is giving high idle? Only thing I changed was I deleted the air-con, and deleted the egr BS that went to the exhaust manifold that was in the explorer, used a good intake from another good engine i had sitting in a parts truck.
Checked for a vacuum leak in the booster. all ok there, no vacuum leaks anywhere in the engine bay.
is there a wire harness sensor that i need to look at?
thanks for reading.