FAST90 install and retune help, log pics inside.

Reply Subscribe

Thread Tools

Search this Thread

May 28, 2006 | 12:04 AM

RPO_Z06

Thread Starter

Launching!

iTrader: (11)

Joined: Aug 2005

Posts: 209

Likes: 0

From: Norman, Oklahoma

FAST90 install and retune help, log pics inside.

I installed a FAST 90 with a LS2 TB and all was going well, the car was running surprisingly well with nothing more than a minimal amount of idle hunting right off the bat.

Then it happened I reset my LTFTs and nothing else, I drove the car to the track, didn't race because I have a clutch issue (another story) but while driving there I noticed it was surging really bad at cruise speeds, I decided to record a log and this is what I see.

I checked for air leaks, exhaust leaks and was about to swap sensors but thought I would try here first.

Anyone got any idea's ?

TIA

May 28, 2006 | 12:17 AM

ZoFastSS

On The Tree

iTrader: (5)

Joined: May 2006

Posts: 123

Likes: 0

I still have a whole lot to learn.

May 28, 2006 | 12:18 AM

txhorns281

TECH Fanatic

iTrader: (12)

Joined: Jan 2004

Posts: 1,869

Likes: 0

From: Houston, TX

bank 2 has an issue (passenger side) on throttle let off, why the crazy TPS??? Did you intentionally drop out of it, or is it hiccuping as you progress?

Last edited by txhorns281; May 28, 2006 at 12:28 AM.

May 28, 2006 | 07:27 AM

SideStep

TECH Fanatic

Joined: Mar 2003

Posts: 1,946

Likes: 1

May 28, 2006 | 06:41 PM

cantdrv65

TECH Junkie

iTrader: (3)

Joined: Nov 2001

Posts: 3,202

Likes: 0

From: TEXASS

Quote:

Originally Posted by txhorns281

bank 2 has an issue (passenger side) on throttle let off, why the crazy TPS??? Did you intentionally drop out of it, or is it hiccuping as you progress?

Yep look at your LTFT on bank 2... 20.0 and the other is 3.1. Id say you have an intake leak on the bank two side of the intake. You can spray carb cleaner in the area of each port and see if the idle changes OR take a Cigarette or incense stick burning in the area and see if the smoke is drawn in to one of the ports.