I need some thoughts from you all on this please. I just recently had a 15% pulley upgrade done along with new Brisk BR12 plugs and JCW injectors on my 2006 R53 with 25k miles on it.
The car started up and ran GREAT during the shakedown run. I got it home and reset the ECU using the odometer function and it has since then taken an extremely long time to start. Like 7 or 8 seconds of turning over before it stumbles to life. There is the smell of unburnt fuel in the exhaust along with a little cloud. Once the car warms up it's fantastic to drive and has great power, no smell or smoke.
I checked for fuel leaks under the hood and noticed nothing..no smell of fuel or visible signs. PLUS, the car hasn't burnt to the ground.

I know the JCW injectors without a tune might not have been the optimum set up, but the tune is coming eventually and I had read where they should work just fine.

Plugs were gapped to .30.

Any ideas?

Thanks all,

 

it should be running really rich get a tune ( or at least the JCW map )

 

Naww...my cars runs great with jcw's, a 17% reduction, and no tune...it starts right up....and I noticed a lot more top end power with the new injectors.
That having been said, I will be getting a tune soon...on light throttle, you should get very effecient combustion, since the computer will use the o2 sensor to adjust the new injectors...when on the throttle (WOT), I know from my mpg, I run a bit rich...(the computer looks up fuel schedules on a chart of sorts, ignoring the 02 sensor wot) but still smooth, and good.
So back to the OP...look to see if everything is correct...I'm not to familar with the brisk plugs, but folks generaly have had good luck with them. It might be worth pulling them out to check them...then re-tourqe them.
The general concensous is that the "cluster reset" from the dash is not likely doing much...in some cases a differance is seen, but from the guys with the high-tech tools, they are certain it is a plecabo effect.
Are you using the stock coil pack? I remember reading that if the Screaming Deamon pack was used with a non-multi point sparkplug, the plugs had to be regapped to a wider setting...outmotoring.com has the statement and info on the product page I think.
Short of doublechecking you work, and making sure the o-rings are intact, the fuel rail is properly postioned (and not bent..something easily done if the injectors are stuck) then check the clips on the injectors...I installed mine...no issues from the first start on... Been the better part of a year now...I did the reset to..just incase since the debate was still rageing at the time. Good Luck!!
Were the jcw's new or used?

 

Thanks for the input Zippy, I went out and changed the plugs back to the factory Ngk's with no improvement. So I'm thinking injectors. I will check them and inspect the fuel rail later this week.
I bought them from a well known fuel management company who had been running them in their lab to test flow for their Koni challenge car. So yes they are used-but well cared for.
One of the plugs I pulled had fuel on it, while the others were dry. (Car had not been run in 18 hours. )
Does that mean anything?
Thanks

 

Are they real jcw injectors? Or are they genaric 380's?
If one sparkplug has gas on it after not running....after sitting, I think that qualifies as a failed injector....it is what is refered to as a dripper, or leaky injector. It likely dripping the raw fuel into the cylindar, filling it up from the rails fuel...from the residuial preasure... Giving you one cylindar that is full of gas....giving you the hard start...it is also diluting you oil libererly with gas, and washing the oil off you cylindar walls....the injector is most likely toast.
A long drive, with some techron might unstick it...but you chance dammage on start-up......
I am by no means an expert on this, but a spark plug wet with gas indactes some bad things are going on with the injectors from what I have read.

 

I'm wondering if there is the possibility that you are not getting enough airflow. Do you have a CAI and upgraded exhaust?

Since you are smelling fuel, I'm thinking you are running very rich for the amount of air in the combustion mix. Like others have said, you should consider getting a tune. Higher rate fuel injectors can dump a lot more fuel than what your car is used to.

 

He has a Dinan CAI and stock exhaust.

 

I think you are on to something there Zippy. You are right, the one wet plug out of four sort of points to a fuel delivery problem of some kind in that cylinder and would explain the unburnt fuel on start up.
They are authentic JCW's by the way. I'll call the folks I got them from and see if they'll throw them back on their bench for me and see what they find.

 

HA HA HA!

How'd you know that! LOL!

What's up brother!

just edited sig to reflect mods

 

I creep around at night and look under the hood of Mini Coopers and occasionally get people named Hiro to work on your car! And now in your sig you dont have to show off the tires your are sporting

 

i swear, anyone who claims the power increase with the jcw injectors w/o a tune is a lier!!!

even the stock ones are running at 92% duty cycle at WOT with 15% pulley.

 

ughh ok...did anyone here say there was a power increase?

 

I've swapped out the jcw's for the stock and the problem has disappeared. So the jcw injectors are getting sent back for replacement. Thanks to those who replied on-topic. Cheers.

 

Glad to hear it wasn't faulty installation!