AFR's

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09-22-2009, 07:04 AM

#41

Chris@FsP

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That's normal for a car running test pipes. The ECU has to dump alot of extra fuel in the cylinder on cold starts due to bad atomization of fuel on a cold engine. I had the exact same spots behind my tailpipes in the garage, lol.

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09-22-2009, 01:29 PM

#42

fla350tt

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good to know about the cats. I would have to wash the car every 3-4 days to keep the car clean.

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09-22-2009, 08:01 PM

#43

binder

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Quote:

Originally Posted by rcdash

Seriously, it doesn't happen to everybody with FI and test pipes? Hmmm... I'll have a look. I haven't had a problem with hot or cold starts so I'm leary about taking away fuel for startup, but I guess it wouldn't hurt anything to try... It takes my widebands about 15 seconds to warm up and by that time, the AFR reads 14-15.

I have my leaned out in the ecu but my wb still shows 14's at idle. I only had a problem with fuel on the ground when i was tuning and it was way too rice. It was idling at 10:1. haha