Anthony17
Member
- Joined
- June 5, 2015
- Messages
- 16
- Reaction score
- 0
- City, State
- Radford, VA
- Year, Model & Trim Level
- 2000 Explorer Eddie Bauer
Hey all,
So I've been trying to track down the rough idle issue with my 2000 Explorer EB. I think I need to replace the IAC valve. What it does is in the morning at initial start-up, the idle sits low and is erratic (jumps between 400-1100) and it slightly shakes the vehicle because of the low idle, and the gauge lights will flicker. After about 20-30 seconds, it resolves itself and goes up to about 2000 for a couple seconds then returns to the correct rpm. I had the electrical system checked at advanced auto thinking it might be the battery or alternator, but all the readings were good. Checked the battery grounds and connections, those are good too.
So yesterday I cleaned the IAC valve and connector (very grime-y and black) and I didn't really notice a difference during the day. Usually the idle is pretty rough throughout the day but not like it is in the morning. This morning after the cleaning, I noticed it didn't do the violent shaking. It still had rough idle but it wasn't nearly as bad. Does that sound like a bad IAC valve? I hear no whistles or moose calls from it. I tried to check for vacuum leaks, but these symptoms don't seem like a vacuum leak to me, that would cause a high idle in my experience. But no vacuum leaks from what I could initially find.
I also checked the MAF sensor and it looks clean to me (had no MAF cleaner). I cleaned the throttle body and valve, as I had a sticky gas pedal, and that was resolved. I also have no idea if the upper and lower manifold gaskets were replaced or are OEM. Again, doesn't seem like a gasket/leak issue because of how erratic the idle. Seems okay when the vehicle is warmed up as well. Any thoughts/testing I can do? I tried to do a TPS and MAF sensor test with a voltmeter but I think mine is too much of a cheapy to sense the low output readings.
So I've been trying to track down the rough idle issue with my 2000 Explorer EB. I think I need to replace the IAC valve. What it does is in the morning at initial start-up, the idle sits low and is erratic (jumps between 400-1100) and it slightly shakes the vehicle because of the low idle, and the gauge lights will flicker. After about 20-30 seconds, it resolves itself and goes up to about 2000 for a couple seconds then returns to the correct rpm. I had the electrical system checked at advanced auto thinking it might be the battery or alternator, but all the readings were good. Checked the battery grounds and connections, those are good too.
So yesterday I cleaned the IAC valve and connector (very grime-y and black) and I didn't really notice a difference during the day. Usually the idle is pretty rough throughout the day but not like it is in the morning. This morning after the cleaning, I noticed it didn't do the violent shaking. It still had rough idle but it wasn't nearly as bad. Does that sound like a bad IAC valve? I hear no whistles or moose calls from it. I tried to check for vacuum leaks, but these symptoms don't seem like a vacuum leak to me, that would cause a high idle in my experience. But no vacuum leaks from what I could initially find.
I also checked the MAF sensor and it looks clean to me (had no MAF cleaner). I cleaned the throttle body and valve, as I had a sticky gas pedal, and that was resolved. I also have no idea if the upper and lower manifold gaskets were replaced or are OEM. Again, doesn't seem like a gasket/leak issue because of how erratic the idle. Seems okay when the vehicle is warmed up as well. Any thoughts/testing I can do? I tried to do a TPS and MAF sensor test with a voltmeter but I think mine is too much of a cheapy to sense the low output readings.
