help me please 6.0 problem :(

Reply Subscribe

Thread Tools

Search this Thread

May 8, 2007 | 11:24 PM

#11

LMK2005

Staging Lane

Joined: Jan 2006

Posts: 77

Likes: 0

From: Grand Blanc, MI

There not the same, trust me. When I got my tune back from Jesse, he had it tuned for the 6.0L injectors and it wouldn't run right. I had to change some settings for the 4.8L injectors. So there different sizes.

May 9, 2007 | 08:28 AM

#12

Tootall

TECH Senior Member

iTrader: (79)

Joined: Jun 2002

Posts: 5,175

Likes: 1

From: League City, Tx

Quote:

Originally Posted by LMK2005

are you sure about that, . . . . they are the same part No.

Jesse, is known for having "tuning" issues.

May 9, 2007 | 09:21 PM

#13

03sierraslt

Admin

iTrader: (22)

Joined: Jul 2004

Posts: 19,007

Likes: 221

From: Western PA

Quote:

Originally Posted by GMC_DUDE

Sounds about right to me. Up to 4000 rpm you are in closed loop mode and the AFR will bounce around 14.7 (The bouncing is to keep the cats happy, too complicated to explain here). Above 4000 rpm the engine is in power enrichment (PE) mode which should be about 12 - 12.5 for NA and 11 - 11.5 for FI. Yours looks a bit rich, but you say you are adding more fuel?

What is it exactly you are trying to do?

It is not quite as cut and dry as that for PE, PE mode is based mainly off of TPS and MAP. Stock tunes are somewhat RPM dependant for the sole reason that they set the RPM delay to like 5500 or something crazy. For referance I can get mine to go into PE at 1100rpm if I put it to the floor from a dead stop. If he is still running the stock tune then his PE most likely is set to 90%TPS across the board.