gunnerbob
Member
- Joined
- April 20, 2002
- Messages
- 10
- Reaction score
- 0
- City, State
- Albuquerque, NM
- Year, Model & Trim Level
- '94
I've been having problems with a hesitating engine on long trips ('94 4.0L stock, 118000 miles), and info from this board points to a possible EGR problem. Following procedures from a number of posts, here is what I found:
1. A vacuum gauge inline between the egr valve and the evr shows no increase upon acceleration with engine warm.
2. There is good vacuum going to the evr.
3. If I ground out the evr with the engine idling, it stumbles.
4. Applying vacuum to the egr directly causes the engine to stumble.
5. Not sure which wire going to the DPFE is output voltage, but one of them shows a voltage increase when vacuum is applied directly to the EGR. The other two are rock steady.
Would all of this indicate a bad evr solenoid?
thanks
1. A vacuum gauge inline between the egr valve and the evr shows no increase upon acceleration with engine warm.
2. There is good vacuum going to the evr.
3. If I ground out the evr with the engine idling, it stumbles.
4. Applying vacuum to the egr directly causes the engine to stumble.
5. Not sure which wire going to the DPFE is output voltage, but one of them shows a voltage increase when vacuum is applied directly to the EGR. The other two are rock steady.
Would all of this indicate a bad evr solenoid?
thanks
