kwheat4136
New Member
- Joined
- Jun 23, 2017
- Messages
- 2
- Reaction score
- 0
- Vehicle Year
- 2000
- Make / Model
- Ford
- Engine Size
- 2.5L 4 cyl 5 speed
- Transmission
- Manual
I recently bought 2000 Ranger XLT 2.5L 4 CYL 5 speed manual. 145700 miles.
Runs great most of the time. I've discovered that when it is idling at startup (the usual higher RPM), if I quickly rev it to bring the idle down it becomes very rough running (almost like it's too rich) and won't stay running, especially at stops. Almost like something is sticking open/closed. I have to keep my foot on the accelerator so it won't die. if it does die in this situation, is very hard to start. Seems to be worse if the AC is on, but not certain on this.
On the contrary, if I don't quickly rev the engine during idling, it runs great all day, very smooth and does not die at stops.
mileage seems fine, no smoking, no fluid leaks, no overheating, all fluid levels have remained constant....
This is what I've done so far:
spark plugs/wires replaced
oil and filter changed
fuel filter replaced
added "seafoam" to fuel tank
IAC valve replaced
MAF sensor replaced
DPFE sensor and hoses replaced
EGR valve replaced
PCV valve replaced
Could this be an O2 sensor problem? It is unclear if any of these things have ever been replaced. (limited service records by seller).
Thank you!
Runs great most of the time. I've discovered that when it is idling at startup (the usual higher RPM), if I quickly rev it to bring the idle down it becomes very rough running (almost like it's too rich) and won't stay running, especially at stops. Almost like something is sticking open/closed. I have to keep my foot on the accelerator so it won't die. if it does die in this situation, is very hard to start. Seems to be worse if the AC is on, but not certain on this.
On the contrary, if I don't quickly rev the engine during idling, it runs great all day, very smooth and does not die at stops.
mileage seems fine, no smoking, no fluid leaks, no overheating, all fluid levels have remained constant....
This is what I've done so far:
spark plugs/wires replaced
oil and filter changed
fuel filter replaced
added "seafoam" to fuel tank
IAC valve replaced
MAF sensor replaced
DPFE sensor and hoses replaced
EGR valve replaced
PCV valve replaced
Could this be an O2 sensor problem? It is unclear if any of these things have ever been replaced. (limited service records by seller).
Thank you!