Howdy Everyone,

I was wondering if anyone has had any experience with utilizing the JCW tune on a R53 MCS with a 15% pulley?

I have started throwing the lean-condition code, and my dealership suggested tuning the car. I'm not looking for some obscene power increase or anything, I just don't want the CEL to come on from lean-condition (P2096) when I go wide-open-throttle.

Dealership said they'd put on the JCW tune for $129.99, and the next cheapest tune I can find is $300+.

Anybody ever try this?

 

I would look deeper...
MOST r53 run untuned with 15%, no codes......
Nice of them to offer, but do you have ANY other mods?
I fear just a JCW tune with a pullet, No exhaust or head-work MIGHT be a bit too rich....especially if there MIGHT be a mechanical issue of some type you COULD be masking with a tune.

 

One thought...
For 2006, the JCW was a 210HP tune. (prior years was a 200HP tune, no injectors or CAI)....
Had a pulley, slightly ported head, CAI, and an exhaust, with JCW 380 injectors....do you have all/most of this stuff?
It WOULD be cheap safe HP...if you add the injectors, and take the tune...but I would TRY to fix the codes first!

 

I would look into the codes more too. I've been running at least a 15% pulley for the better part of 300,000 miles and have never seen that code. Something wrong with the fuel delivery perhaps?

Nik

 

Dead Link.

I have no other mods. Just feels dumb, because I took it to the dealer and asked them to diagnose it, and all they could come up with was "no boost leaks or anything of that sort, no power issues or dead O2 sensors, therefore it is the pulley leaning out the mixture."

One other bugger of this, is that after the first time the light turned on, I filled the car with fuel, and the light was magically off again.

Drove it for a while, and then, something like 200 miles later, the light clicked on and has not gone off for 2000 miles.

Not sure what kind of mechanical issue I would be really masking.

 

Yeah...the Link gets ***** out if I don't put in spaces...the system here considers the competing site to be the same as a 4 letter word!!
The link was just to the list of codes....just conformination as to the meaning of the code for anybody reading in the follow-up.

As to "mechanical" issue....low fuel PSI leading to lower than expected fuel delivery....
Did the dealer tell you what the "fuel trims" are in the computer? that is the computer adjusted fuel delivery either + or - from the factory maps the computer has learned to keep the car running good.
Hate to say, but the dealer sounds like a bunch of part changing monkeys...to just say basically "I don't see anything" without trouble shooting anything...that tech should be re-trained...by his NEXT employer.
Did they at least pull this info for you, then re-set the adaptations? I hope they did not charge you for too much work.....car might re-learn OK.

 

Check the wiring to the second O2 sensor. They sometimes rub on the shielding near the header causing intermittent errors. I've had two do it.

Just a thought.

Nik

 

The dealer said they inspected it, and even took it off the wire and checked the voltage. I cannot hear any exhaust leaks. Just an unfortunate set of circumstances.

 

And check...MANY (check by production date) 2005 cars had the O2 sensor given an extended 10 year, 100,000 mile warranty....due to issues.....
All owners of record (at the time) got a letter...

 

Sorry for the troubles your are having. Just posting my experience for another data point.

My car is a 2004 15% pullied with JCW injectors, JCW intake and the JCW tune. Had no codes. If anything, I think I ran a little rich (sooty tail pipes). The car even pinged a little but AFR was fine (dynoed rich).

 

Pinging would indicate its running lean...not rich

 

Yeah I know, car came up pig rich on the dyno and still pinged slightly.

 

I had the the stock tune a 15% PULLEY, Alta CAI and exhaust and never got a lean code. After I got the JCW tune (without upgrading the injectors) I only got a lean code once. If you'r pulling long tall hills it could do it. I got mine coming out of Vegas heading back to PHX.

A 15% pulley will NOT cause a lean code on it's own unless you're stressing it at high altitude. I say take it and get a second opinion. WELL if they'll do the tune for you at that kind of price I say get it. Then go get the lean code fixed. Thats a great price for the tune and you usually can't find a dealership that will do it for you.

 

I wouldn't do the JCW tune w/o the injectors, the head is so mildly ported that it won't matter, but the injectors will.

& yes there "should" be something else amiss here.

 

A JCW tune may change the pulse rate of the stock injectors, but I have never done this.

I have however had a similar lean code. Issue in my case was the intake duct horn and green jam gasket not having a tight seal allowing ambient air to enter the system.

To get to the horn and secure properly, works better if the MINI is put into service mode and radiator removed. Pushing hard against the lower part of the duct while tightening the bolt at the bottom ensures tight fit.

Duct is part no. 15 below.



Most cases just replacing the green gasket works just fine, but the hole at the end of that tab you see above was elongated in my case, so entire piece was replaced as well.


Green jam gasket - Part No 21. at supercharger.