My wife's 06 cooper s went into "limp Mode". I unplugged the MAP sensor and was able to get it running (poorly). I got the codes read and the MAP was one of the issues so I replaced it. The other issue was an inability to read TDC. I cleaned the Crank Position Sensor and replaced the o ring. The car ran great and my wife sent me the "you're a genius" text from work.Then (cue scary music) she called me from the side of the road. I unplugged the MAP and got it home. I'm Planning on getting a new CPS. It's also making pulley noise (grease dried up ?). If the crank pulley is the culprit will that cause the TDC/limp mode issue ? Also, how do you disconnect the friggin' connection on the CPS??? It's breaking into pieces!!! Sorry about the long post. Any help would be appreciated:mad2: Codes were 0113, 0107, 1688. After changing MAP I only got "can't read tdc"
:cornut: We really do have knowledgable people here that can probably help so we'll keep 'bumping' till they come along. Jason
Ok I'll take a stab. What code are you getting that is telling you "cant read TDC"? Get a flash light and take a good look at the crank pulley. You need to check the front of it to tell if its bad. The pulley noise you hear could be the supercharger. It may have leaked out its oil. If you have a long screwdriver put it on the SC and the other end on your ear, just be careful don't get it near the pulley. Let us know what you find
The CPS plug. Some time if you push the plug together then push in on the tab it may pull apart. doing this takes the tension off the catch allowing them to unlock before you pull it apart.
If you suspect a bad crank pulley, pull off the wheel, remove the liner and check it.....the stock ones have a tendancey to fall apart. And yes, that would throw a few codes if its bad.
The code reader actually said "can't read top dead center" or something like that. I think it was related to 1688 code. I'm sorry if I don't have all info right, I took it to a BMW "specialist" and I'm not sure that I trust him. He said he thought the noise was coming from the idler pulley. I'll take the wheel off tomorrow morning and check for myself. I'm a Jeep guy (83 CJ7) so I'm new to all this computer code stuff.
do you think I'm wasting my time with the cps ? I've ordered the part but it doesn't come til tomorrow morning.
Code 1688 is Electronic Throttle control Monitor Level/Mass Air Flow Calculation. The Bently manual has the description as Monitoring of mass air flow, low MAF limit exceeded, Related Components- Supercharger. All that to say you may need to replace the SC belt. But the rattle could be a bad idler pulley or Belt tensioners. If the SC belt is slipping this may be the cause of the problem. I would check both
That was a little long, here is the short. Nothing should rattle. If you have someone rev the engine while you look at the belt tensioner it should not move. If it moves very much it's letting the belt slip and needs to be changed. If you change it get a new belt also. If it is the idler pulley change it and the belt. Hope that helps.
Thanks ! that sounds like real good advice. I'll get on it tomorrow morning. I just hope I can get it wrapped up before Monday. I need to get a book,can't afford it right now...soon tho. I guess my trust issues were right with the guy that did the diagnostics on it. :cornut:
I checked the pulleys the sound is coming from the crank pulley. It must be going bad internally,if it's wobbling it's very slight. I can't move it and the belt looks fine. Wifey tells me it got hot when it went limp on her,when I drove it home the temp stayed fine. maybe the belt slipped a little but I saw no evidence of belt damage.
The water pump runs off the back of the SC. If the belt is slipping I could cause all sorts of problems and of course if the crank pulley is bad it will also cause lots of problems. When you change the crank pulley get a new belt. Also check the belt tensioner. If it is week it will allow the belt to slip under acceleration. You still may not be able to move the belt by hand. The best way I know of th check the tensioner is watching it when the engine is revved. If it moves back then it is allowing the belt to slip. To get the belt off you pry the tensioner back. Then you will see a a tab slid out with holes in it. Put a small Allen wrench in the hold. That will holt it back so you can install the new belt. Maybe some of the other guys will have something to add. Good luck
Thanks I forgot to check the tensioner :crazy: I'll do the now I betcha I need to replace it...Probably won't find it today.
I checked the tensioner, it's rock solid. The noise from the pulley is intermittent, less often when warm, I know it needs to be replaced. I'll need to order it and the belt on line, the dealer is crazy expensive (over 300.00 for pulley 70 plus for belt).If anyone has a line on parts I'd be grateful. I've seen them for about half online but I'd like to go to the most reliable/reputable place possible.I've maybe said before, I'm a Jeep guy I can find those places all day. I've never had to fix a mini before. Are those Alta lightened pulleys any good ?
I would go with a fluid field or the OEM. check some of our sponsors. You could try Detroit Tuned, Helix, Way motor Works, eMiniparts just to name a few. They are all real helpfull. Just give one of them a call Monday.
Actually.....I would skip both the OEM and the fluid filled.......save your money and just go with a solid 2% over drive pulley. Solid pulleys have NEVER been shown to be an issue....EVER! I have run my 2% for years....with a 16% SC pulley...AND....my car pulls to 8000 rpm! But....it's your choice
Thanks guys. I replaced the cps. I decided to pull the new MAP to take a look and there was a slight film of oil. The air filter wasn't clogged. I took the intercooler(?) off the rubber gasket on the right had some oil in it also. could the hose from the crankcase be plugged or something ? I borrowed an obd2 reader and I'll erase the old codes tomorrow and drive some and take new readings to see where I'm at.
OK, looks like the super charger pulley. The noise is coming from the pulley end(couldn't hear any noise with stethescope in the charger body). The belt is starting to shred.I'll be ordering sc pulley, Crank pulley, and belt tomorrow. I don't think the s charger went dry, but I don't know how to check. I think I'll be OK w/belt and pulley. The oil up top bugs me it's not a lot but I think it should be dry. I'm gonna check the crankcase vent hoses.