GearheadJLM
Member
- Joined
- January 22, 2006
- Messages
- 31
- Reaction score
- 0
- City, State
- Jville NC
- Year, Model & Trim Level
- 03 Explorer XLT 4.0L 4x4
Vehicle: 2004 Ranger XLT 4x4 4.0L SOHC Ext Cab Step side 5 speed w/129k
What's done to it: Flowmaster Catback, K&N Air Filter
No Check Engine Light (CEL)
Here's the issue: Say I am cruising or just trying to shift and the RPM is at about 1800-2200, When I push in the clutch (and let off the gas) the RPM's will jump up to around 3200 and hold for about 2 seconds, then drop to around 2500 for a second or so, then 1500 and then finally down to 800-900 (by this time I'm stopped). Speed, engine temp, and outside temp seem to have no effect on it.
I have tried to replace the IAC and TPS. I tried taking the Mass Airflow Sensor out and cleaning it with rubbing alcohol. I put new plugs in, and it didn't make a difference.
I am questioning EGR Valve, but am most expecting a hard to find vacuum leak. I tried spraying Ether (starting fluid) around vacuum lines and intake to see if I noticed a difference, and didn't.
Has anybody else had this issue? What else could it be? How else can I diagnose and find a vacuum leak?
Any help would be appreciated.
Here's some pics:
What's done to it: Flowmaster Catback, K&N Air Filter
No Check Engine Light (CEL)
Here's the issue: Say I am cruising or just trying to shift and the RPM is at about 1800-2200, When I push in the clutch (and let off the gas) the RPM's will jump up to around 3200 and hold for about 2 seconds, then drop to around 2500 for a second or so, then 1500 and then finally down to 800-900 (by this time I'm stopped). Speed, engine temp, and outside temp seem to have no effect on it.
I have tried to replace the IAC and TPS. I tried taking the Mass Airflow Sensor out and cleaning it with rubbing alcohol. I put new plugs in, and it didn't make a difference.
I am questioning EGR Valve, but am most expecting a hard to find vacuum leak. I tried spraying Ether (starting fluid) around vacuum lines and intake to see if I noticed a difference, and didn't.
Has anybody else had this issue? What else could it be? How else can I diagnose and find a vacuum leak?
Any help would be appreciated.
Here's some pics:
