CA Smog: High Hydrocarbon PPM on n54 2007 335i e92.

Curt · 04-09-2014, 08:59 PM

I just recently got back from an emissions test, CA SMOG, and received a high reading on HC (PPM): hydrocarbon ppm. The results are as follows:

• 15MPH: 96 PPM (MAX Allowed: 52)
• 25MPH: 28 PPM (MAX Allowed: 36)

I have a n54 2007 BMW 335i with JB+ installed when the test was taken.

Work Log (prior to test):
I didn't warm up the engine other than driving 2 miles to a shop before taking the test.
Switched back downpipes to OEM stock from AR Catless 2 weeks before test.
I've just (1 hr before test) put in the stock intake from AFE.

My question to you is: What do you think is causing the high HC PPM? Would having JB+ plugged in make a significant difference in hydrocarbon compared to a stock install? I forgot to unplug the chip before taking it in, I wonder if it'd make a difference if I remove the HB+ chip.

techwhiz · 04-17-2014, 09:30 PM

You didn't warm up the cats......

Curt · 04-17-2014, 09:37 PM

Quote:

Originally Posted by techwhiz

You didn't warm up the cats......

Warmed it up and it made a difference, but still not enough to pass.

Thread continues here: http://www.e90post.com/forums/showthread.php?p=15771559

04-09-2014, 08:59 PM	#1
Curt Private 24 Rep 95 Posts Drives: 2007 e92 335i Join Date: Apr 2012 Location: Bay Area iTrader: (0)	CA Smog: High Hydrocarbon PPM on n54 2007 335i e92. I just recently got back from an emissions test, CA SMOG, and received a high reading on HC (PPM): hydrocarbon ppm. The results are as follows: • 15MPH: 96 PPM (MAX Allowed: 52) • 25MPH: 28 PPM (MAX Allowed: 36) I have a n54 2007 BMW 335i with JB+ installed when the test was taken. Work Log (prior to test): I didn't warm up the engine other than driving 2 miles to a shop before taking the test. Switched back downpipes to OEM stock from AR Catless 2 weeks before test. I've just (1 hr before test) put in the stock intake from AFE. My question to you is: What do you think is causing the high HC PPM? Would having JB+ plugged in make a significant difference in hydrocarbon compared to a stock install? I forgot to unplug the chip before taking it in, I wonder if it'd make a difference if I remove the HB+ chip.
	Appreciate 0 Tweet Quote

04-17-2014, 09:30 PM	#2
techwhiz Colonel 455 Rep 2,972 Posts Drives: e90 335i Sedan - Arctic Join Date: Feb 2012 Location: Bay Area, Ca iTrader: (4)	You didn't warm up the cats...... __________________ Arctic Metallic\CF Splitters, Spoiler, Mirror Covers\LED Tails\LSD\Tinted\Coded\Apex Square SM10-19"\LED Angel Eyes\Gloss Black Grill\Integrated V1 & Galaxy Tab\M-Performance Brakes\Cobb Tuned\xHP Flash\Resonator Removed and -> is your friend.
	Appreciate 0 Quote