check engine light - 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 01-05-2006, 09:23 PM   #1
Junior Member
Thread Starter
 
Join Date: Jan 2006
Posts: 9
Thanks: 0
Thanked 0 Times in 0 Posts
jtmbka@yahoo.com is on a distinguished road
Default check engine light

My check engine light keeps going off and on. The code keeps coming up lean burn and I have chased it around in one exspensive circle . It all startedwith the ox sensor I have also replaced two coil packs, spark plug wires & plugs, mass air flow sensor and pcv valve. The pcv seemed to help it a lot but the check eng light still keeps coming on.
can anyone help me? :( :(
jtmbka@yahoo.com is offline   Reply With Quote
Old 01-05-2006, 10:10 PM   #2
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default Re: check engine light

Quote:
Originally Posted by [email protected]
My check engine light keeps going off and on. The code keeps coming up lean burn and I have chased it around in one exspensive circle . It all startedwith the ox sensor I have also replaced two coil packs, spark plug wires & plugs, mass air flow sensor and pcv valve. The pcv seemed to help it a lot but the check eng light still keeps coming on.
can anyone help me? :( :(
Oxygen sensor was a good place to start, and the MAF also, although the MAF can be an expensive 'shoot from the hip' repair.

A bad plug or wire cannot cause a LEAN condition. It'll cause rich, but again, not bad to change them anyway.

Taking this to the next level, now that you have the basics out of the way:

1. Look for an exhaust leak. Either from the mating surfaces of the manifolds to the heads, or from cracks. Could even be a leak EGR tube/valve, or even possibly the union at the crossover pipe under the Throttle body. Anything in the exhaust BEFORE the O2 sensor.

2. Consider pulling your fuel injectors and inspecting them. An injector running lean will have more carbon/oil buildup on it than a properly firing injector.

EXCELLENT post by the way. Very descriptive, and got us all on task right off the bat.
Only problem is your username. There are internet 'bots' that do nothing but scan the internet for email addresses all day long to add to 'spam' lists.

Send me a private message if you'd like to change your username.
willwren is offline   Reply With Quote
Old 01-05-2006, 10:27 PM   #3
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

When changing a maf you should disconnect the battery for 20 minutes and then reconnect. Did you happen to do this?
BillBoost37 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1998 Catera - Check Engine Light, ABS Light and TC light on lucille2 Cadillac 2 02-10-2011 11:58 AM
Phantom Check Engine Light/Rough Engine/Coolant Temp. Gauge Whacky RWW2003 1992-1999 10 11-13-2009 08:00 AM
Check Gages-BRAKE light, trac off light, and Antilock light all on MissRockstar04 2000-2005 9 07-07-2009 05:12 PM
Engine miss, check engine light on - NO code mdrose64 1992-1999 12 07-16-2007 12:43 PM
Check engine light and traction off light on - hissing sound erics95se 1992-1999 11 04-08-2006 01:40 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 11:36 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.