Engine Drivetrain 1st Gen Cooper S Most liked posts in thread: 03 S falls on its face

Mine is filled with unobtainum.

 

oh and a dirty fuel filter can cause it as well because if the engine starts to get fuel starved it will adjust the timing and ign to compensate...also you might want to look at your fuel pump...depending on its age it might not be working as well too...i know i replaced my pump at about 180k and the plastic was so dry the spring loaded top popped out like a jack in the box as soon as Colin pulled the access cover

 

Could be a failed crank pulley, too.

 

That's an interesting thought... if it is ALMOST done, but still grabbing at lower RPMs, this could be it.

 

the DT BPV isnt a radical redesign its just a stock one with a stiffer spring...i had one in my R53 for 140k miles with never an issue...i pulled the throttle body off every once in awhile and cleaned the butterfly valve because after years of use it will gunk on it...also pull the intercooler off and check the boots and the other vac lines...sometimes a small crack or tear in a boot or hose can cause a yoyo effect

 

Check your IC boots, mine did something similar. My boots were worn out and not sealing, funny thing was it seemed only to act up during lower RPM/boost. Just a suggestion, good luck.

 

Maybe the new shift knob is too heavy or something. Or could it be you went to some club. We at the un-club were glad to see you this morning.

When you narrow this down let us know what it was. I have no clue on this one. miniconcarne may be onto something.

 

I'm not sure either Sean, but I'd recommend calling Chad at DT and see what he has to say before you bring it to any local shop. If it's just replacing the intercooler boots or something simple, you can probably do it yourself.

My guess though: it has something to do with a sticking bypass valve.

 

+1 Once it gets boost you could be developing a leak. Do you have a boost gauge? Also, can you creep up beyond 2k slowly, another words, not under boost?

 

Wouldn't he have a code if he were losing boost that drastically? My DSC has been acting up lately similar to how the OP's is. Does the light for your DSC blink when your car is doing this? Another thing you can try is turn off the DSC and see if the problem is still there. you may have a overly sensitive speed sensor or one that is failing but not quite ready to get you the xmas tree lights.

 

Not sure if it will throw a code? Good question. And I assumed he would have already turned off the DSC? Good question also. That's why I have the FES modual......no pesky DSC for me

 

When my IC boots were leaking just slightly I got a code and a SES light.

 

Mine worked fine until I pushed the car into positive boost pressure (around 2500 rpm), then it threw a bunch of lights and went into limp mode.

 

About $400 for parts and a few hours of labor. It's not that difficult to do yourself... I did a write-up in the MA library with all of the instructions you might need.

http://www.motoringalliance.com/library/1st-generation-mini-cooper-how-to-3/replacing-the-crank-pulley-101/#axzz1pcka6KqM

Given your loose IC boot, that's probably your problem.

Good luck!