Too much cooling?

slo_335-e90 · 12-06-2012, 05:46 PM

Hey guys,

So I was at the track on Sunday, and it was a relatively nice day out (sunny, not humid). Temperature was probably low 40's. Anyways, it was the last test and tune of the season, so I ran a 50/50 e85/93 mix. I'm also running meth, jb4, intake exhaust and bigger front mount; pretty much everything but downpipes. anyways, my first two passes were awful. Once I hit 4th gear, the car was cutting power with engine malfunction (what I used to experience when I had to change my ignition coils it'd be misfiring). Anyways, clear the code with the tune and everything's back to normal. So for my last pass, since I only had 3 passes, I turned off the meth and just ran map 5. I was able to get a successful pass in without any issues. I spoke with a friend of mine who's very knowledgeable on these types of things, and he said it could've been potentially too much cooling and it was causing a spark blow out. Does this make sense? Or could it have been something else?

n54gte · 12-06-2012, 07:19 PM

Well, did you read the code before you cleared it? Anyways it looks like the meth is causing problems but you should log when you get a chance

rdeterman · 12-06-2012, 07:36 PM

did you do a log?

Ænema · 12-06-2012, 11:37 PM

Sounds like you're just getting misfires on the more aggressive mapping. Probably in need of a fresh set of plugs.

cn555ic · 12-07-2012, 07:02 AM

It could also be quench from meth. Too much methanol injected and the atomization is poor, coupled with E85. Its not the fact of it being too cool but I would think your meth nozzle size coupled with the E85 is causing this bog. AKA Quench

BMWN54tech · 12-07-2012, 12:17 PM

How old are the plugs? Usually it's plugs or a bad injector on the cars I see but they don't run meth.

Jeff@TopGearSolutions · 12-07-2012, 01:54 PM

Quote:

Originally Posted by cn555ic

It could also be quench from meth. Too much methanol injected and the atomization is poor, coupled with E85. Its not the fact of it being too cool but I would think your meth nozzle size coupled with the E85 is causing this bog. AKA Quench

Meth quench is possible. Some people use to throw codes on really cold temps with methanol, related to o2 sensor readings and low EGT warnings. This is a really rare occurrence.

It's likely spark plugs though.

slo_335-e90 · 12-07-2012, 08:34 PM

Well I can rule out the sparks, since I just changed them about 2500 miles ago. Ignition coils I did about 12-15000 miles ago, so it could be that but not very likely? I'm not really sure. Unfortunately I wasn't logging and I didn't get a chance to read the code, but I think it will happen again sooner or later, so in that case I'll be ready for it

12-06-2012, 05:46 PM	#1
slo_335-e90 Lieutenant 33 Rep 571 Posts Drives: 2007 E90 Join Date: Feb 2010 Location: USA iTrader: (11)	Too much cooling? Hey guys, So I was at the track on Sunday, and it was a relatively nice day out (sunny, not humid). Temperature was probably low 40's. Anyways, it was the last test and tune of the season, so I ran a 50/50 e85/93 mix. I'm also running meth, jb4, intake exhaust and bigger front mount; pretty much everything but downpipes. anyways, my first two passes were awful. Once I hit 4th gear, the car was cutting power with engine malfunction (what I used to experience when I had to change my ignition coils it'd be misfiring). Anyways, clear the code with the tune and everything's back to normal. So for my last pass, since I only had 3 passes, I turned off the meth and just ran map 5. I was able to get a successful pass in without any issues. I spoke with a friend of mine who's very knowledgeable on these types of things, and he said it could've been potentially too much cooling and it was causing a spark blow out. Does this make sense? Or could it have been something else? __________________ -335xi---Innotech Exhaust---AR 3" Catless---Pro tuned---HPF FMIC---ER Chargepipe---KW V1---Injen DCI---BMW Performance Front Bumper, Rear Spoiler & Door Sills---Vorsteiner wheels---much more-
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12-06-2012, 07:19 PM	#2
n54gte Lieutenant 42 Rep 537 Posts Drives: prius Join Date: Jun 2012 Location: north korea iTrader: (0)	Well, did you read the code before you cleared it? Anyways it looks like the meth is causing problems but you should log when you get a chance
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12-06-2012, 07:36 PM	#3
rdeterman First Lieutenant 11 Rep 399 Posts Drives: 2008 335i Coupe 6mt Join Date: Apr 2012 Location: Iowa iTrader: (2)	did you do a log? __________________ JB4 G5 ISO W/BMS FLASH, FBO, Walbro LPFP, Spec S2+ SMFW
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12-06-2012, 11:37 PM	#4
Ænema Captain 14 Rep 961 Posts Drives: BMW Join Date: Aug 2012 Location: Arizona Bay iTrader: (0)	Sounds like you're just getting misfires on the more aggressive mapping. Probably in need of a fresh set of plugs. __________________ "I'm not surprised you get along well with all the other neighbours. If you put fifty children with Down's syndrome in a room there is going to be a lot of hugging." David Thorne
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12-07-2012, 07:02 AM	#5
cn555ic 441 Rep 18,331 Posts Drives: 335i Join Date: Jun 2007 Location: US iTrader: (6)	It could also be quench from meth. Too much methanol injected and the atomization is poor, coupled with E85. Its not the fact of it being too cool but I would think your meth nozzle size coupled with the E85 is causing this bog. AKA Quench Last edited by cn555ic; 12-07-2012 at 07:21 AM..
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12-07-2012, 12:17 PM	#6
BMWN54tech Private 4 Rep 63 Posts Drives: e92 335. Join Date: Dec 2012 Location: USA iTrader: (0)	How old are the plugs? Usually it's plugs or a bad injector on the cars I see but they don't run meth. __________________ BMW master tech 2010 E92 335i 6-speed 25k miles. - For sale. 1989 E30 325i coupe 5-speed DD
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12-07-2012, 08:34 PM	#8
slo_335-e90 Lieutenant 33 Rep 571 Posts Drives: 2007 E90 Join Date: Feb 2010 Location: USA iTrader: (11)	Well I can rule out the sparks, since I just changed them about 2500 miles ago. Ignition coils I did about 12-15000 miles ago, so it could be that but not very likely? I'm not really sure. Unfortunately I wasn't logging and I didn't get a chance to read the code, but I think it will happen again sooner or later, so in that case I'll be ready for it __________________ -335xi---Innotech Exhaust---AR 3" Catless---Pro tuned---HPF FMIC---ER Chargepipe---KW V1---Injen DCI---BMW Performance Front Bumper, Rear Spoiler & Door Sills---Vorsteiner wheels---much more-
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