AFR's

Reply Subscribe

Thread Tools

Search this Thread

Sep 22, 2009 | 07:04 AM

#41

Chris@FsP

Vendor - Former Vendor

iTrader: (4)

Joined: Aug 2009

Posts: 1,601

Likes: 0

From: Tulsa

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.

Sep 22, 2009 | 01:29 PM

#42

fla350tt

Registered User

iTrader: (4)

Joined: Jul 2009

Posts: 104

Likes: 0

From: florida

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

Sep 22, 2009 | 08:01 PM

#43

binder

New Member

iTrader: (8)

Joined: Jan 2007

Posts: 6,457

Likes: 7

From: terre haute, IN; STL, MO

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