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Forced Induction Forum
Discuss supercharging, turbocharging and even nitrous and water injection here.

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Old 05-31-2014, 03:51 PM   #1
imapimp
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LAB22 M3 Turbo AFR Issue (Radium Fuel & AEM Infinity)

A bit of background info:

I have a 2004 M3 6 speed Vert. Was previously hpf turbo with proefi & flexfuel, resulted in cracked block. Sent the car to LAB22 built engine, got radium fuel system including surge tank, went with AEM Infinity. Car drives like stock then when you get on it your gone its insane and this is only on the first boost setting. The thing I have noticed is when cruising the AFR's will be going back and forth between 12 and 16 (shown in video).

I linked a couple videos showing the afr issue (on E85 & 93 pump) I have been having. I also attached a video showing a white smoke coming out of the exhaust (not sure what that means).

Would like some feedback or possible things I should start looking at as I am getting ready for a 2-day 1/2 mile airstrip event in June and don't want to run in there and have issues.


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Old 05-31-2014, 03:56 PM   #2
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Man I would test the sensor first. There's a YouTube video on it. Seems pretty wonky to be actual afr issue.


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You sir, just thread jacked the sh!t out of OP.
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Old 05-31-2014, 04:07 PM   #3
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Man I would test the sensor first. There's a YouTube video on it. Seems pretty wonky to be actual afr issue.


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That's what I was thinking too but you can feel the car change when it is going back and forth. Give it more acceleration and it stops doing that but the problem is I'm not looking to get a speeding ticket either.
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Old 05-31-2014, 04:35 PM   #4
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When did this start? How many miles have you put on it? How much smoke? Have you checked your coolant? Do you have capability of taking a log with your laptop?
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Old 05-31-2014, 04:37 PM   #5
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Also is there a specific fuel composition it does this more on? Sounds to me like a PID setting needs some adjustment.
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Old 05-31-2014, 09:36 PM   #6
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When did this start? How many miles have you put on it? How much smoke? Have you checked your coolant? Do you have capability of taking a log with your laptop?
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Originally Posted by Commanderwiggin View Post
Also is there a specific fuel composition it does this more on? Sounds to me like a PID setting needs some adjustment.
From the day I got it but I thought it was just because I was using 93oct as it was colder now the past few weeks have been nice weather and I've been running e85 with the same results.

I'd have to check and make sure but I would say around 2k miles. Smoke is pretty much how shown on the vid. I checked coolant level when I first got it but haven't checked it since to see the color. The oil from all the oil changes has looked good nothing weird.

I'm not sure how to do that but I do have a laptop and the cable is in glove box just not sure what kinda software I need to take logs.

No its same on 93oct, e85, & mix. Not exactly sure what PID settings are.

I sent an email to John to get some feedback.
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Old 06-01-2014, 03:01 AM   #7
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Is it only on light throttle? I just drove from Cali to Colorado and I could replicate the same thing it's just the point where you are going from throttle to decel...I'm sure some new settings from John will fix it.

You will need InfinityTuner to start with.

As for the smoke check your scavenge pump (Pump, Fuse, Relay in that order). Mine was giving me grief last week turned out being the relay.
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Last edited by Commanderwiggin; 06-01-2014 at 03:10 AM.
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Old 06-01-2014, 07:52 AM   #8
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If it were oil wouldn't it burn blueish?
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Old 06-01-2014, 03:10 PM   #9
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I have nothing productive to add other than get this fixed so we can have some fun in the Pikes Peak event! I'm preppin also ;-)
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Old 06-01-2014, 03:57 PM   #10
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Checked the coolant just now and it doesn't look good!



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Old 06-01-2014, 03:59 PM   #11
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Ummm yeah that doesn't look good...


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You sir, just thread jacked the sh!t out of OP.
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Old 06-01-2014, 05:59 PM   #12
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Yup head gasket and or block cracked between water/oil passages. No event unfortunately.
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Old 06-01-2014, 06:03 PM   #13
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I've seen the thing a while back...the ****ing guy never let the oil temps come up to operating temp...it was me lol.
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Old 06-01-2014, 06:13 PM   #14
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Yup head gasket and or block cracked between water/oil passages. No event unfortunately.
Damnit. The event is June 21st & 22nd so there is some time. It what be the last straw on this car if I can't make that event. Last year about this time is when the block was cracked and I missed the event. One thing I've always wanted to do and everytime it get ****ing ruined

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I've seen the thing a while back...the ****ing guy never let the oil temps come up to operating temp...it was me lol.
??? You talking about your car.
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Old 06-01-2014, 06:31 PM   #15
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Yup. His coolant looked the same.

Hopefully yours is just a head gasket.
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Old 06-01-2014, 08:05 PM   #16
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??? You talking about your car.
What other car would it be lol. Ya talking my old motor, pretty sure I had some photos on facebook of it...had been like 2months since I drove it...got excited let coolant warm up but didn't think about the oil and just smoked it out of the gate lol. My lesson learned unfortunately...will have to bug aem to set oil temp warmup protection...currently its just coolant temp and oil takes like 10min.
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Old 06-01-2014, 09:50 PM   #17
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Did they repair the cracked block?

Also the block and head need to be decked to perfection otherwise you will have head gasket issues.
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Old 06-01-2014, 10:19 PM   #18
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Did they repair the cracked block?

Also the block and head need to be decked to perfection otherwise you will have head gasket issues.
They used a new block; and they always deck to perfection...no fooling around here.
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Old 06-02-2014, 11:47 AM   #19
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Quote:
Originally Posted by imapimp View Post
Damnit. The event is June 21st & 22nd so there is some time. It what be the last straw on this car if I can't make that event. Last year about this time is when the block was cracked and I missed the event. One thing I've always wanted to do and everytime it get ****ing ruined



??? You talking about your car.
Correction imapimp, the event is June 27/28th so you have 26 days to swap motors bad for a good one ;-)
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http://www.m3post.com/forums/showthread.php?t=727953

Custom Silver CF 6Speed E46 M3 sport steering wheel
http://forum.e46fanatics.com/showthread.php?t=1051908
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Old 06-02-2014, 12:00 PM   #20
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Did they repair the cracked block?

Also the block and head need to be decked to perfection otherwise you will have head gasket issues.

Yeah they put in a different block in mine and everything should have been to perfection thats why i sent it to Lab22. I don't know wtf happened though

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Correction imapimp, the event is June 27/28th so you have 26 days to swap motors bad for a good one ;-)
I'm talking about the event in Chicago (monee airport) on June 21 & 22 done by WannagoFast. It's gonna have a MaxPSI, Saad, & Lab22 (my car) there which is gonna be crazy to line up the 3 head to head

If it's just a head gasket it shouldn't be hard to get it ready but if it's more I'm done with this **** because I don't have the time or patience to worry when the next time the motor is gonna go.
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