I have been suffering with an un-stable idle which recently seems to have been getting worse. Sometimes when sitting stationary, or as you approach a stop, the engine idel seems to waver, and has even stalled. :mad2: Since my mods last year, I have always had a slightly more 'lumpy' idel due to the cam, but this seems more related to an intermittent electronics issue. I have been given a couple of pointers, and the TMAP sensor is going to be swapped out first. Has anyone else had this issue and can make some other suggestions?
Mine does the same thing but doesn't sound as bad as yours... mine has never stalled... Let me know what it is if you can find out... PS Mine is an auto (maybe that has something to do with it?)
OK, keeping in mind that I have a justa, I'll toss this out any way. Mine was doing the exact same thing and replacing the plugs did the trick. Jim
No codes. A/C on. I have not had a 'cool' opportunity to drive it around for any length of time with it switched off.
Next on the list. Just ordered a set from Jan, but mine have only got about 6,000 miles on them. Bit of a pain with the GP IC as that has to be removed to change the plugs! Then the front O2 sensor is next on the list.
Have you ruled out any vacuum leaks, including IC boots? If not a smoke test might be a good place to start. 2 cents
:lol::lol::lol: A mechanic pumps smoke from a smoke machine into your intake; the smoke allows you to identify any vacuum leaks on the intake side of the engine.
Exactly !!! LOL Ben told you correct. Smallest leak throws everything off and a smoke test is the best way to find one. Shouldn't cost ya much either.
Thanks. I think I could have handled the first version myself! :lol: I will have a word with my 'Tame' MINI technician and see if he can do one for me.
Might check your IC boots yourself; pull the cover and while it's running see if you feel any air coming out of them and or pop the IC off (car off) and give them a good inspection. They usually fail right along the clamps and this will show up first as a rough idle and progress as the leak gets worse. Hope this helps ya.
Thanks, I'll check them out. I did actually put brand new ones on when I installed my GP IC, but always worth another check. Isn't there also a vacuum pipe under/behind the IC itself?
Yes down below the fuel rail and more. Why the smoke test is so good at narrowing down where the problem might be. It may not be a leak but I'd want to rule it out before replacing sensors and then still have the problem. Good luck!
Nathan, I tried briefly with the A/C on and off. Doesn't seem to make a difference to the idle. What's your reasoning behind the A/C making a difference?
The ECU has two different idle settings that differ by about 50 rpm the greater one is A/C on. Was curious if it made a difference with your issue or not.
I just had my oil changed yesterday... My idle issue got considerably worse... Whenever I start the car the engine revs dip very low and then back up to around 1,000 rpm and bounce back and forth until it finally reaches a steady idle... Could the oil change have affected anything?