Help troubleshoot problem plz... - LS1TECH - Camaro and Firebird Forum Discussion

General Maintenance & Repairs Leaks | Squeaks | Clunks | Rattles | Grinds

Help troubleshoot problem plz...

Thread Tools Search this Thread
Old 10-30-2011, 12:02 AM   #1
Thread Starter
iTrader: (1)
LS1TA_956's Avatar
Join Date: Jul 2011
Location: Laredo
Posts: 270
Unhappy Help troubleshoot problem plz...

So Ive been having trouble with my 1998 Trans Am it stumbles when warm (on closed loop) at wot in low rpm range like from 1k to 3k........ It runs fine when cold in open loop. I also have to prime it twice sometimes 3times for it to start fuel rail looses fuel pressure if left off more than five minutes..

*also where is the fpr located at? is it the one in the rail?

I put the scanner and these are the codes:


Last edited by LS1TA_956; 10-30-2011 at 12:33 AM.
LS1TA_956 is offline   Reply With Quote
Old 10-31-2011, 08:39 PM   #2
TECH Senior Member
iTrader: (2)
Join Date: May 2008
Location: South Florida
Posts: 10,932

They all point to a bad 02 sensors. Bank 2 Sensor 2. So passengers side, rear sensor. Passengers side front sensor. And Bank 1 Sensor 1, drivers side front. So 3 bad sensors.

I would get a scan with an OBD11 scanner WHILE the engine is running to make sure they are all bad. If its conformed, buy 4 new ones.

P0171 System too Lean (Bank 1)
P0157 02 Sensor Circuit Low Voltage (Bank 2 Sensor 2)
P0131 02 Sensor Circuit Low Voltage (Bank I Sensor I)
P0151 02 Sensor Circuit Low Voltage (Bank 2 Sensor I)
P0153 02 Sensor Circuit Slow Response (Bank 2 Sensor 1)

LS6427 is online now   Reply With Quote
Old 11-02-2011, 08:04 PM   #3
Staging Lane
artic99z28's Avatar
Join Date: May 2010
Posts: 71

check your cat to make sure its not clogged more likely than not your whole o2 sensor system is working fine its just thinking u have a lean condition wich only worsens the problem so

-check your catalytic converter to see if its clogged-
thats way more like ifs prly not sensor system if it was just 1 sens id say maybe but its not its 3 , also the loss of pwr when under wot tells me clogged cat
artic99z28 is offline   Reply With Quote

closed, loop, ls1, stumbles

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 10:34 AM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.
  • Ask a Question
    Get answers from community experts
Question Title:
Your question will be posted in: