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Old 09-08-2010, 12:41 AM   #1
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emissions question related to FPR

This has nothing to do with FI, but I figured the guys that hang in here might have the best input:

I'm having trouble getting my E30 318is to pass emissions. Failed with high HC and CO both at idle and 40km/h test. At the time I would occasionally see the CEL flash if idling but would go away as soon as throttle was applied. Turned out to be code 1222. Cured it by replacing the FPR, but instead of stock-for-stock (3.0bar), I put in the 3.5bar one from the M50 I'll soon be swapping in (had it readily available). It got rid of the code and it hasn't come back after a couple hundred Kms of mixed driving, but I'm wondering if I'm hindering my chances to pass emissions with the higher-pressure regulator.

I only ask because I read somewhere that a FPR must be able to maintain pressure to within 1psi or so in order to achieve the proper stoichiometric ratio, complete combustion, etc....

Am I being paranoid?
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Old 09-08-2010, 11:06 AM   #2
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Old 09-08-2010, 06:19 PM   #3
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First what step you took in order to try to pass Emission test?

Second what is code stands for?

Are you OBD 1 or 2?
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Old 09-09-2010, 01:13 AM   #4
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update (lol): tested again, passed HC, CO with flying colours, but failed NOx this time (passed it before). I put a pretty concentrated mix of methyl hydrate in the tank though... I think I f***ed myself. Gonna try again with straight premium fuel once I burn up this mix. I suppose my question is answered....
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Old 09-24-2010, 05:58 PM   #5
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Hey Nick, 1222 could be misfire, so check wires and plugs.
85 325 - Turbo M52B28.
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Old 12-03-2010, 12:35 AM   #6
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also put gasline anto freeze, that shit works amazingly!
e39 M5 (s62)- Muffler Delete, Timmay Tips,
e30 325ic - Hard Top, Matte Black
e36 328is - (m52)AA S/c'd, M50 Mani, 3.23 LSD, M3 Brakes, Zimmer rotors, hps pads, Racing Dynamic Strut Bar, Depos, m3 Bumper, Intake, Spal fan, poly RTABs, Eibach Swaybars, Koni yellow, Mishimoto Rad, Silicone hose, Alumi T-housing, Depo w/LED Angels, LED tails, 12' Alpine Type R, Suede head liner, LTW Low rise spoiler
92' 325is (m52) - M3 conversion AA S/c'd
'97 Euro Estroil E36 M3 Vert (S50B32)
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