Engine Mechanical problem
1997 Jeep Wrangler 4 cyl Four Wheel Drive Manual 125000 miles

IN my 97 Wrangler 2.5l Manual Trans, When I start to drive (EVERY time) I get about a 1/4 mile and it hesitates, hot or cold. If I keep accelerating it just stalls (doesn't kill the engine). Once I let off the accelerator and clutch and them pump the accelerator it kicks back in and doesn't do it again until I turn off the car and then drive it again.

I have Changed both O2 sensors, new manifold, new plugs and wires, and replaced the MAP sensor.

Any suggestions on what this might be?

Thanks

Do you have, or have you had, A check engine light recently? I would be suspicious of the throttle position sensor, but a little more information will help narrow it down. Please advise.

The check engine light will come on periodically and stay on a couple days and then go off for about a week, then repeats.

What ever is tripping your check engine light could be a valuable clue to your problem. Auto Zone, and most moast other parts stores will scan your computer for free. If you will have this done and let me know comes up, we can go from there. Please advise.

Actually, I bought one online that I think is going to help. It should be here today. I will wait for the check engine light to come on and then let you know what the code is. I have to say, this is a GREAT resource for help. Thanks for this service.

All the moderators here enjoy sharing experience, not only with the posters, but with each other. What ever tripped your check engine light will be stored in the computer's memory. You can scan the memory any time, even if the CEL is not on.

I used the ignition ON-OFF ON-OFF ON mode and it gave me the following codes:

22: Engine coolant temperature sensor above or below acceptable voltage.

12: Direct battery input to PCM was disconnected within the last 50 Key-on cycles.

14: MAP sensor input above or below acceptable voltage. 5 volt output to MAP sensor open.

Interestingly enough I put a new MAP sensor in the other day and my diagnostic OBD machine said it was at 5 volts

When I hooked up the OBD machine I just got today, it gave me trouble codes:

P0118 (M)
Engine Coolant Temperature Circuit High Input
Engine coolant temperature sensor input above the maximum acceptable voltage.

P0108 (M)
Manifold Absolute Pressure/Barometric Pressure Circuit High Input
MAP sensor input above maximum acceptable voltage.

I would go ahead and change the temp sensor, clear all the codes and see what comes up in the next day or two. The CTS input will have a bearing on map sensor processing. Let me know.

Where is the Temp Sensor?

I just took it for a drive with the ScanGuage installed.
The coolant temp leveled out at 195 degrees and the MAP was 5 PSI at Idle and maxed out around 13.5- 14 PSI at full accelleration. I read that up to 15 PSI is normal. I am not sure if this helps......
Thanks

Check to see what the temp sensor reads when you start it up cold.