04 GTO problems - LS1TECH - Camaro and Firebird Forum Discussion



Pontiac GTO 2004-2006 The Modern Goat

04 GTO problems

Reply
 
Thread Tools Search this Thread
Old 11-30-2016, 07:04 PM   #1
Teching In
Thread Starter
 
Chris Licwinko's Avatar
 
Join Date: Nov 2016
Posts: 2
Default 04 GTO problems

OK, I've read alot of different post on here as a guest, before signing on, I have a '04 A4 that I bought sight unseen on the internet, good price, but not as I thought. It had long tubes, no cats, SLP loudmouth, K&N CAI, no tune, melted O2 wires. I removed the longtubes, replaced with JBA shorties, JBA high flow cats, left the SLP anf K&N, did wires, plugs, O2's,Intake gaskets, smoked intake, no leaks, fuel pressure 58 psi at idle, driving car at 55-65 lt fuel trims are @18, around 80 lt fuel trims are @8, stft are varing between +3, -3, randomly throws P0171,P0174 codes, tried different MAF, no change. I had to put in O2 sensor spacers in the rear sensors to get it barely thru inspection (voltage @.120), engine light came on during exit, Also traction control randomly turns itself off, usually after a long decell, Does it need a tune? Or what to look at next?
Chris Licwinko is offline   Reply With Quote
Old 12-01-2016, 02:34 PM   #2
10 Second Club
 
dw456post's Avatar
 
Join Date: Nov 2005
Posts: 374
Default

When you say fuel trims, do you mean afr reading from the wideband? You should probably turn off the rear o2's with the high flow cats. Sounds like you need a good tuner to tune it up. If you are saying that the wideband is reading 18 at 60mph, that is really lean. 8 is really rich.
dw456post is offline   Reply With Quote
Old 12-01-2016, 03:52 PM   #3
Teching In
Thread Starter
 
Chris Licwinko's Avatar
 
Join Date: Nov 2016
Posts: 2
Default

I'm going off my Actron scanner, viewing the data stream while driving
Chris Licwinko is offline   Reply With Quote
Old 12-01-2016, 07:14 PM   #4
10 Second Club
 
dw456post's Avatar
 
Join Date: Nov 2005
Posts: 374
Default

I'm not familiar with Actron
dw456post is offline   Reply With Quote
Old 12-02-2016, 01:17 PM   #5
TECH Resident
 
MuhThugga's Avatar
 
Join Date: Jul 2007
Location: Wilmington, De
Posts: 992
Default

Check your fuel pressure under load.
MuhThugga is offline   Reply With Quote
Old 12-09-2016, 12:45 PM   #6
TECH Apprentice
iTrader: (11)
 
Buzzmanb12's Avatar
 
Join Date: Dec 2005
Location: BAMA
Posts: 363
Default

Also check the fuel pump relay. Mine did the same thing some 10 years ago and it was the in-tank fuel pump, worked fine at idle but started "Laying down" under load. It caused the relay to go bad as well.
Buzzmanb12 is offline   Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
02 z28 shuts off random times 02z28_559cencal New LS1 Owners - Newbie Tech 2 06-04-2017 03:36 PM
Dyno tune on a bolt-on LS1 INFERNY General LSX Automobile Discussion 17 12-07-2016 12:46 AM
Guess my results ls1 gto fast 102 and throttle body swap Mustang dyno Andy2004gto Dynamometer Results & Comparisons 24 04-12-2016 08:09 PM
06 GTO going back stock. Trickflow heads, headers, FAST 102 & inj, cams, Yella Terra AbsolvedJD Parts Classifieds 43 05-28-2015 02:37 PM
99' Z28 miss and backfire on acceleration What Could I DO? Austin Stuart General Maintenance & Repairs 2 01-20-2013 05:50 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 07:40 PM.


 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: