97 Bonneville P0300 and P0171 - 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 03-14-2010, 06:09 PM   #1
Junior Member
Thread Starter
 
Join Date: Apr 2009
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
jtehler is on a distinguished road
Default 97 Bonneville P0300 and P0171

Trying to troubleshoot but so far no luck. Checked all plugs and no problems there. Also tested coils and batteryl cables/connections. I have uploaded a video to youtube linked below:

http://www.youtube.com/watch?v=KZpZBwq_VoY

Any input would be appreciated.
jtehler is offline   Reply With Quote
Old 03-14-2010, 06:13 PM   #2
Senior Administrator








Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Horseheads, NY
Posts: 15,647
Thanked 999 Times in 775 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

Let'* see here, we have a couple writeups on these...

P0300
https://www.gmforum.com/showthread.p...ighlight=p0300

P0171
https://www.gmforum.com/showthread.p...ighlight=p0171

Give those 2 threads a read through and if you have any further questions, give a holler!
Mike is offline   Reply With Quote
Old 03-14-2010, 06:16 PM   #3
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

P0300 is nothing to worry about, that'* random misfire and is caused by what ever is causing the P0171. There'* a reason why P0171 is the first OBD code I did a write up on. It'* the most common and it'* a major pain at times. follow the write up and check everything. Vacuum leaks are what you will be looking for. Remember, there are vacuum lines on your HVAC system, so check those as well.
Danthurs is offline   Reply With Quote
Old 03-15-2010, 10:36 AM   #4
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

Agreed, find the reason for P0171 and you should fix the misfire. That'* usually a pretty bad vacuum leak to cause a misfire BTW.

Has any work been done to the car in the last 3-6 months?
BillBoost37 is offline   Reply With Quote
Old 03-16-2010, 02:20 PM   #5
Junior Member
Thread Starter
 
Join Date: Apr 2009
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
jtehler is on a distinguished road
Default

Still checking for the vacuum leak, no luck so far. I did have the intake manifold gaskets and valve cover gaskets replaced by a local shop in October. Also they replaced the water pump and new plugs/wires.
jtehler is offline   Reply With Quote
Old 03-16-2010, 02:24 PM   #6
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

Be sure to check for leaks by the injectors. The O rings can leak. Spray everything with carb cleaner.
Danthurs is offline   Reply With Quote
Old 03-16-2010, 02:40 PM   #7
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

It'* a pain to get at, most likely though ... it'* your EGR to LIM tube.

To check it, skip the carb cleaner, skip the everything and go to removing for a visual inspection. Yes, it'* a little of a pain to get the LIM bolt holding it.

13mm bolt at the LIM, 13mm nut at the EGR. Once you sneak it out, pull back the part that holds it to the LIM and hold the tube up to the light. I can nearly put money on it having a crack. Hit a junkyard for a new one. I think GM wants your first born for a new one.
BillBoost37 is offline   Reply With Quote
Old 03-16-2010, 02:42 PM   #8
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

If that'* the case, I think I have 2 of them on the shelf
Danthurs is offline   Reply With Quote
Old 03-16-2010, 03:27 PM   #9
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

Good to know, I think I'm out at the moment. And there'* 4-5 EGR'* with pedestals sitting here if that says how many I find in bad shape.
BillBoost37 is offline   Reply With Quote
Old 03-16-2010, 03:30 PM   #10
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

I bought a new one 2 years ago. No longer have a EGR on my car.
Danthurs is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1997 Buick LeSabre P0300 and P1406 with rough idle ymmot04 Buick 9 03-24-2014 08:28 AM
P0300 & P1406 Codes and Rough Idle - Fixed Rob96Olds88LS 1992-1999 1 03-23-2007 08:17 AM
recent P0300 and now low fuel pressure LittleHoov Bonneville GXP/ Northstar Powered Cars 6 02-15-2007 07:29 AM
sudden onset missing, P0300 code, and white smoke?? laff66 1992-1999 13 05-23-2006 11:14 PM
Code P0300 and weak cylinder on #6 egladman 1992-1999 14 11-28-2005 11:16 PM


Tags
p0171, p0300

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 12:45 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.