help!!! P0171 never ending battle - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 04-11-2008, 01:12 AM   #11
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Jan 2008
Posts: 39
Thanks: 0
Thanked 0 Times in 0 Posts
tan96ssei is on a distinguished road
Default

hey tech ted i havent gotten an email yet just curious if you got pm or not
tan96ssei is offline   Reply With Quote
Old 04-11-2008, 11:14 AM   #12
Senior Member
Certified GM nut
 
Join Date: Oct 2005
Location: Western New York
Posts: 1,942
Thanks: 0
Thanked 0 Times in 0 Posts
Technical Ted is on a distinguished road
Default

Sorry for the delay - they're on the way.
Technical Ted is offline   Reply With Quote
Old 04-15-2008, 12:05 AM   #13
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Jan 2008
Posts: 39
Thanks: 0
Thanked 0 Times in 0 Posts
tan96ssei is on a distinguished road
Default

sorry for the being the bringer of old topics but i would like to know now that i have cleaned the ground from battery-to-block and power-to-starter/alternator and the power to fuse block
did i miss any of the obvious grounds or power connections posibly one for sensors seeing as how i think this is the ever so common electrical related lean bank

is it worth replacing the IAC, or the MAF i do have a slightly rough idle and when i cleaned the two of them the MAF was fine just dirty and i did the hit test on it and it was fine and the connector test and it instantly threw the code but when i cleaned the IAC it was terribly dirty and when i tried adjusting it... it sperated the plunger from the motor piece but it fight back together again and was very stiff is that normal or not?

i really want to get this issue under control and i cant get it figured out for the life of me i need guidence on this one.
tan96ssei is offline   Reply With Quote
Old 04-15-2008, 09:38 AM   #14
Senior Member
Posts like a Turbo
 
Join Date: Jan 2008
Location: Memphis, TN
Posts: 281
Thanks: 0
Thanked 0 Times in 0 Posts
93RedSled-SSE is on a distinguished road
Default

Jumping in sideways for a minute. On those grounds, you should also have some others at:
  • - The other ICM mounting stud.. not where the battery to block ground is.. the OTHER stud. That is where the PCM gets its ref. ground on mine.
    -Also, one on each front fender, under the hood
    -And, one behind each front kick panel. May be up, sort of high
I saw some discussion about vacuum earlier. If you get desperate, you can eliminate possibility of vacuum causing it, if you block ALL your vacuum inlets at the vacuum tree. You probably could not test drive it this way, but could clear the code and see if it comes back just idling and revving, etc, in Park. Of course, if it is still there, you can concentrate on the other stuff.
One last note; had one member who was running lean and finally found a bad brake booster as the culprit. Yeezch!
I'm back out of here.
93RedSled-SSE is offline   Reply With Quote
Old 04-15-2008, 03:13 PM   #15
Member
Posts like a V-Tak
 
Join Date: Dec 2003
Location: round lake beach illinois
Posts: 38
Thanks: 0
Thanked 0 Times in 0 Posts
superman013 is on a distinguished road
Default

i had the same code i checked everything like you. it turned out to be a vacuum leak. i smoked the system all lines were connected but it was coming out the small *-hose on the supercharger.
superman013 is offline   Reply With Quote
Old 04-15-2008, 09:22 PM   #16
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Jan 2008
Posts: 39
Thanks: 0
Thanked 0 Times in 0 Posts
tan96ssei is on a distinguished road
Default

tahnks for the thought redsled i noticed your thread and checked it out but on 96 the batt to motor ground is on the front of the block under the first cylinder and i did not notice any grounds heading towards the ICM
tan96ssei is offline   Reply With Quote
Old 04-16-2008, 02:41 AM   #17
Senior Member
Certified GM nut
 
Join Date: Oct 2005
Location: Western New York
Posts: 1,942
Thanks: 0
Thanked 0 Times in 0 Posts
Technical Ted is on a distinguished road
Default

Didn't the scans help at all?

This problem should fall into one of these three categories.

1- Bad MAF
Did you try unplugging it? Wasn't that one of the steps in the manual?

2- Lack of fuel
Even though the pressure checked good it could be dropping off as the injectors use more fuel. Has the fuel filter been changed? The fuel pressure regulator has a screen that may need cleaning. Have you tried any fuel injector cleaner?

3 - Vacuum leaks
Did you try spraying throttle body cleaner on all the vacuum lines & fittings? Try disconnecting the vacuum line from brake booster & plugging it. If you need to go for a test drive with the booster unplugged then start out very slow & try stopping. It'll take a lot more force on the pedal to stop. Some have had good luck by using cable ties on the vacuum lines. See pic.

Name:  95L36TBvacports.jpg
Views: 12
Size:  81.6 KB
Technical Ted is offline   Reply With Quote
Old 04-16-2008, 12:39 PM   #18
Senior Member
True Car Nut
 
Join Date: May 2005
Location: _Phoenix, AZ_ _WCBF '05, '06, '07 Survivor_ ____NEBF '07 Remnant___
Posts: 3,448
Thanks: 0
Thanked 0 Times in 0 Posts
Echo SSEI is on a distinguished road
Default

Quote:
Originally Posted by tan96ssei
tahnks for the thought redsled i noticed your thread and checked it out but on 96 the batt to motor ground is on the front of the block under the first cylinder and i did not notice any grounds heading towards the ICM
A '96 should have a ground under the ICM attached to the ICM mounting stud, if not then you have found a problem.
Echo SSEI is offline   Reply With Quote
Old 04-16-2008, 01:01 PM   #19
Senior Member
Posts like a Turbo
 
Join Date: Jan 2008
Location: Memphis, TN
Posts: 281
Thanks: 0
Thanked 0 Times in 0 Posts
93RedSled-SSE is on a distinguished road
Default

x2. It is a normal sized, smaller black wire coming out of the loom. Don't leave home without it.
93RedSled-SSE is offline   Reply With Quote
Old 04-20-2008, 08:27 PM   #20
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Jan 2008
Posts: 39
Thanks: 0
Thanked 0 Times in 0 Posts
tan96ssei is on a distinguished road
Default

grounds there and clean i went through the check list and still got a code im really concerned and not sure why but my mind keeps going back to the fact that my exhaust is high flow all around cat and muffler
tan96ssei is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
P0171 in a parking lot, never again SignOfZeta Pontiac 8 12-15-2012 07:24 PM
Never ending KR issue Danthurs Performance, Brainstorming & Tuning 19 08-05-2012 09:26 PM
My never ending rust battle Buick96 Your Ride: GM Pictures & Videos 8 05-01-2011 04:34 PM
never ending quest for rock guard two bonnies Detailing & Appearance 7 09-07-2007 06:13 PM
My Park Avenue has a never ending high idle issue! Buickman104 Buick 27 04-17-2006 02:56 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 -4. The time now is 11:29 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 Amazon.com and affiliated sites.