Most liked posts in thread: Highly Modified JCW Roadster - Limp Mode and Engine Check Light Issues

Oh was that your black JCW coupe I saw parked at Helix today.

Best of luck with your ride, but I would trade it because well it's 2nd gen. Try and R53 for real fun.

 

You don't want to race my car because I am waaaaay out of your league. Next time you are at Helix ask them about my car that Eric built back when he turned wrenches. After that go look at the Dyno wall of fame. The only car above mine is the gray JCW sitting in the shop wait for New motor.

I know about having lots of money in a car so I guess I will see you at the shop sometime. :ihih:

 

What motor work have you had done and who tuned your car? Please don't say you have a Manic tune.

Just trying to help.

 

I had the same problem with the same turbo on jcw compression for around a year trying to figure it out. In my case the JMTC turbo waste gate preload was not set correctly and I had a hot side boost leak around the throttle body that took forever to find. The car also kept roaching coils and spark plugs for some reason.

JMTC could not get my car tuned right after months of anally blown smoke. Rmw said he's developing a stand alone which is not available yet as far as I know. I eventually found Jzw tuning who got my car running right without codes/boost dump/ limp mode...for now.... He said JMTC had the tune all screwy with a 12k rpm redline set ut:.

My car has ported everything so it took him a while to get it figured out but he did, so props to Jzw for accomplishing what no one else could. Wouldn't recommend manic also known as maniac tunes because of their propensity to esplode. Not saying mine won't blow up but it hasn't yet... If I make it past 10k miles I'll consider it reliable...

It makes around 25psi and I haven't got it dynoed yet. The car has a few tunes on a Powergate 3 programmer including a 40% ethanol mix tune. I will still detonate periodically under high load and boost on 91 pump gas but have not encountered any detonation running ethanol which is supposedly around 100 octane. Haven't got a temp gauge but I know it runs hotter than hell which Jzw said is because of the design of the engine bay and size of turbo.

In my case it was bad tunes (multiple), boost leaks, incorrect waste gate preload, and bad coils/plugs even though less than 5k miles old.... He said the car was also "clenching" spark and he messed with the plug gaps.

How much oil do u use? You should make sure it's not sucking oil screwing up your afr. Good luck...

 

Both you guys are WAAAAAY beyond me. I just want to add moral support to Charlespmead. Hope the MINI Gods smile on you.

 

Jan / RMW tunes are solid. I bet the issue is with the turbo and waste gate as Guapfish_fiver said above.

 

It's not working because it's a modified 2nd gen. Seems to have been the trend with modifying these cars, the more you do to it the less it'll run. I'm sure it's SUPER fun for the first few months or so (if that) after you add some go fast bits and tune it up. Once you up the boost you gotta up the fuel on a fuel system that has a tenuous grasp on it's fuel pushing capabilities (or lack there of), boom there goes a HPFP (for like the 4th time). It'll be running hotter due to the higher boost, so the carbon deposits will bake on even thicker/faster. Next thing to go will be the water pump. Then you get into all the little random issues that pop up at least once a year that'll need some attention. Not to mention the mediocre longevity built into the cars suspension components.
Do what Dave said or go back to stock. Or buy a car that comes with some actual power if that's what you're after.

Welcome, Chuck

Or maybe... MAP sensor? Is the timing chain stretched enough that you'll get any cam/crank sensor issues? Limp mode for me in the passed has been fuel related.

 

What tune does the car have? How are they certain it's not the tune? What pressure does it dump boost at?

What u should do is disconnect the downpipe, hook up a vacuum pump to the DV, pump it up to 15 pounds or so, and make sure the gate is tight and sealing. The pivot arm could be shot and not sealing the lid.

 

If Eric has a tuner in California it's JAN the owner of RMW. The tune is solid.

JAN comes to Helix once a year for a week to tune cars on the dyno. JAN is also at the Dragon every year.

The problem is the R56 (2nd Gen) cars do not like turbo upgrades and stuff. BMW made them that way for a reason. :ihih: