Stalling Issues
Good day,
I have a 1999 1.8L MPI Pajero I/O. I've had it for almost a year now, with just oer 117,000 km on the engine. A few weeks ago, I started having some issues; a friend of mine had some trouble with his, so we switched the two coils to see if that was a problem. After putting them back in, I realised a decrease in power.
Took it to my mechanic who has a diagnostic tool. He found an error, cleared it, reprogrammed and everything was fine. About a week after, I started experiencing some stalling. It would happen after a cold start, but if I turned off for a few minutes and back on, it would be fine. It then got much worse, to the point where I couldn't drive more than 100ft without it stalling.
Took it back to the mechanic, he said the throttle position sensor was bad, and maybe the ECU was overheating. I bought a new sensor and put it on last night. I was able to drive much further, but after driving for about 30 minutes, same issue, this time, while actually driving; whereas before it would stall soon as I tried moving off.
I disconnected the terminal and realised this solved the problem temporarily until driving again. I realise it happens when the jeep is under high revs, especially when going up an incline.
So I was curious as to if the ECU might actually be overheating, or it might be another issue.
Doubt
Thanks for the suggestion Claude, but I changed the coils last year when I got the jeep, put in brand new ones. I also recently serviced and changed all the spark plugs.
The issue happens when driving up a hill or for a prolonged period of time. I am taking it to my mechanic this morning for him to try and diagnose the issue for me, so I will let you know the status afterwards.
Thanks again though.
Update
So I got the jeep reprogrammed, but my mechanic said he wasn't seeing any error with the throttle position sensor. However, as the jeep was idling, it began to overheat. He suggested that was causing the engine shutdown, as well as the water pump (we were hearing a grinding sound when the jeep was idling and also when we revved the engine). I did a radiator flush yesterday, refilled with coolant and tried it out, it worked pretty well for a short drive.
Drove to work today, worked well again, even got up to 50 mph. However, leaving work, stalled out one more, and the grinding sound from the water pump seems to be getting worse. So I was just curious if anyone else ever had such an issue.
Final Results
So, update from the last post. I changed the water pump, timing belt, a/c compressor, alternator belt (my mechanic did that on his own judgement). And since then, haven't had any stalling issues whatsoever. I did have an erratic needle jump one time, but hasn't happened since.
The mechanic also told me the camshaft pin needs to be fixed, but can be done a bit later on.
So I'm back on the road again. However, I realise a loss in power from the engine. Might need to reprogramme again.
Syndicate
problem
I am not the best with ECU problem but if you problem does happen under load like going up hill as you mentioned, this does make me think of a faulty coil, lead or spark plug....but I could be wrong...ask my wife....:)
As you drive on the flat (no load) only a "small" amount of fuel is injected in the cylinder. Once going up hill ( more load) more fuel get injected and the compression in the cylinder increased. If your spark, from the spark plug, is not strong it will fail under the higher compression. This should not make the car stalling while driving but it will misfire and may not idle properly but shouldn't stall.....
You maybe had two problem...again, I am not the best with ECU problem, other might have better idea.
How did you go with your rear suspension bushes ?
Happy io
My io is now SOLD Thankshttp://pajerio.com/forum/claudes-io-2002-zr-built-thread-onlyhappy-io