For the past couple of weeks, every now and again while I cruise to a stop as I get slower the jeep starts to shake, I rev the engine a bit and it goes away. Doesn't happen every time, but seems to be happening more frequently now. And then this morning I was in third gear and it was doing the same thing, but the engine might have been idling down because I was slowing (not positive). A few minutes after that I was idling for a couple of minutes and the check engine light came on. Went by Advanced and it threw the code P0132 (online says 02 Sensor Circuit High Voltage (Bank I Sensor 1)). I'm not really sure what the problem is. I know I need to tighten down bolts on exhaust manifold because I have a slight leak there. Could it be fuel injectors or pump? I'm lost and not sure where to start looking. Any help would be much appreciated!
Check all your rear end bushings and motor mounts. The O2 sensor could be a completely unrelated problem. The shake you're feeling when you take the load off your drive tran could be a worn bushing or motor mount. I had a similar problem and it was my bushings in my lower control arms.
and yes, just today it started in third gear, but just for a few seconds, i threw it in neutral and revved the engine a bit then didn't notice anything until the check engine light came on about 5 minutes later.
from what I can tell online and from the code, I could be looking at forward o2 sensor, exhaust manifold leak, fuel injectors and/or fuel pump and rear bushings and motor mounts. Any ideas on where to start?
I have a 1998, 2.5L, manual too and had those exact symptoms. Have your clutch checked out. I had those symptoms in 3rd gear as well where it would just sort of shudder but would go away if I hit the gas. Would be going just fine then it'd shuddered like it was gonna die then it was just fine. Had my pressure plate replaced I think and it hasn't happened since. Just a thought.
It was over a year ago so I don't remember it doing it then. But it was almost exclusively in 3rd gear as far as I can remember. But check your O2 sensors first since that is cheaper. Then maybe get the clutch checked out.
Just wondering, have you driven through any relatively deep water (like more than 6") and/or sandy areas recently?
haven't driven through any high water, no. will def check the wiring on upstream sensor. any chance anyone has pictures? and i'll look into the clutch plate as well, there has always been a squeaking every time i engage the clutch, never bothered me but who knows. I really appreciate all the help, any I can get really I'm sort of learning as I go!
Just wondering if some may have gotten into our clutch assembly. I got caught in a bad rain storm (like hurricane bad) and some got splashed up into my clutch from hitting pooled water in the road, which started the downhill till I eventually took it to the shop and got it fixed.
anyone have the exact location in the powertrain control module the upstream o2 sensor connects into so I can check for shorts/grounds? i've got the factory service manual here, the wiring diagrams are a maze to get through.
man it sounds like i've got a few things to look in to. it's intermittent, only happened once so far in 3rd gear and since then check engine lights been on. weird but i have to start with o2 sensor I guess, easiest to check and fix. any further ideas would still be greatly appreciated!
the upstream O2 sensor is located before the catalytic convertor(follow the exhaust down from the manifold.) Check the wiring first for damage and clear the codes by d/c the battery or code reader. I suggest you spray PB blaster on it to help with removal. You can rent or buy an O2 sensor socket to ease with removal or some have luck using a regular wrench.(7/8" I think) I highly recommend the O2 socket. You do not want to strip the sensor using a regular wrench.
I have nearly the same problem, except for the 3rd gear stuff. I have a 97 2.5L 5-speed and when I step on the clutch to slow down my RPM's drop down to about 250-300, but as soon as I come to a stop the RPM's go back up to "normal" around 750 or so. I thought it was my 02 sensor at first as well so I changed it but the problem persists. My jeep also shudders alot when this happens, thats why I think we may have a similar problem.
In starting to delve a little deeper today I started with checking fuse that controls the O2 sensor, fuse number 21. All checked out there, so I went to the sensor itself and it looked brand new; no corrosion, rust, or any other visible damage. I started tracing the wiring back as far as I could go and I ran into a splice from where the previous owner must have switched out the sensor. I thought I had found the problem, but unfortunately the splices looked clean and well done. Kept tracing further up and I found another splice, right up against the fire wall, pulled out of the plastic tubing it was supposed to be in. These splices however looked like they were done by an epileptic five year old. You could see half inch of conductor on either side of each splice, and because the wires weren't protected in any way, most of the original wiring side was bare for 2 or 3 inches, not to mention they were twisted almost into a knot. At this point I used electrical tape to cover all exposed conductors around the splices and the damaged wires until I can get some new splices and do it the right way this weekend. I started her up and let her idle for a few minutes and haven't had an issue yet. This isn't to say it's fixed, I have to drive it a little longer before I feel confident in saying that, but I'm hopeful.
Anyone have an explanation why the fuse didn't blow? I know it's a 20A fuse but still. The only thing I can come up with was that the ground/short was intermittent depending on movement. I still don't know what caused the initial start to the problem though. I've had this Jeep for a year now and I've only had the problem for maybe a couple of weeks, and even then it only got bad in the last 2 days. Haven't done any repairs to that part of the vehicle. I'm hoping just dumb luck because this problem I can fix and it'll be inexpensive if it's just the splice repair. Either way I'll keep you all informed. Thanks again.