I drive a '99 Wrangler 2.5 L 4 cyl 5 speed and been having "bucking" problems with it for quite some time now and cannot get to the bottom of this. I replaced the O2 sensor about a month ago and it fixed the problem for awhile but now the Check Engine light is back on and the 'bucking' is back again. I get the bucking to stop when I either let off the gas or hammer down. I notice it really gets bad when I'm going over bumpy roads and when the jeep is warmed up. Also, it starts to cut out sometimes when it's idling but never enough to make the jeep stop running.
The codes that came up are:
- P0171 Fuel System Bank One Sensor One
- P0133 O2 Sensor
My mechanic suggests I get rid of or replace the cat converter and in my case I'd rather get rid of the converter and not spend the extra money.
Some solutions mentioned in this forum were:
- Plug wire arcing to the head where hidden behind the A/C compressor
- Take IAC & TPS off the throttle body, clean IAC, replace TPS
- Crank Position Sensor
- Airbag Clock Spring
The codes that came up are:
- P0171 Fuel System Bank One Sensor One
- P0133 O2 Sensor
My mechanic suggests I get rid of or replace the cat converter and in my case I'd rather get rid of the converter and not spend the extra money.
Some solutions mentioned in this forum were:
- Plug wire arcing to the head where hidden behind the A/C compressor
- Take IAC & TPS off the throttle body, clean IAC, replace TPS
- Crank Position Sensor
- Airbag Clock Spring