Four Codes, rough idle, hard starting - 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 04-10-2010, 04:58 PM   #11
Senior Administrator








Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Horseheads, NY
Posts: 15,643
Thanked 997 Times in 774 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

Quote:
Originally Posted by st041986 View Post
The only thing I looked for and couldn't find was an article on how to remove and clean the throttle body? I'm sure I just over looked it, but could somebody link me to it?
Don't have one, YET. Our database is always being updated. Huh Dan!?

I could give you a quick run down if you'd like. Long run down would be me going out and doing pics for ya.
Mike is offline   Reply With Quote
Old 04-10-2010, 05:06 PM   #12
Junior Member
Thread Starter
 
Join Date: Apr 2010
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
st041986 is on a distinguished road
Default

It'* no biggy. I'm gonna see how it runs with what I've done so far and save cleaning the throttle body for another day when I have nothing better to do. It looks like it won't be too hard, but the one torx bit I need to remove the MAF and TPS is ofcourse one that I LOST while changing the TPS a while back.
st041986 is offline   Reply With Quote
Old 04-10-2010, 10:28 PM   #13
Junior Member
Thread Starter
 
Join Date: Apr 2010
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
st041986 is on a distinguished road
Default

Well I got it put back together and it fired up MUCH better than it has been. We drove it about an hour and shut it down. When we came back out to leave, probably 30-40 minutes later, it started up and started misfiring and had NO POWER. After driving around the parking lot for a little bit it stopped and the power came back and it drove normal. After this we went to eat, stopped again, came back out 45 minutes later and it was doing it'* hard starting crap again, but it wasn't misfiring. We drove it a few minutes and then parked it, shut it off, and turned it right back on and it came on fine. It only seems to act up when it'* been warmed up, then let cool for a little bit.

It does idle much better and doesn't surge like it did before ONCE it'* been started so cleaning the EGR and IAC did help, but just didn't cure the big problem.
st041986 is offline   Reply With Quote
Old 04-11-2010, 08:55 AM   #14
Senior Administrator








Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Horseheads, NY
Posts: 15,643
Thanked 997 Times in 774 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

Have you checked the bottom of your coils for corrosion and how well they seat? Inspect and apply dielectric grease to the metal tabs on the ICM.

Also, check your ground bus connectors. Me smelling something here.
https://www.gmforum.com/showthread.php?t=278980
Mike is offline   Reply With Quote
Old 04-11-2010, 11:15 AM   #15
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

Possible vacuum leak on the EGR tube?
Danthurs is offline   Reply With Quote
Old 04-11-2010, 12:53 PM   #16
Junior Member
Thread Starter
 
Join Date: Apr 2010
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
st041986 is on a distinguished road
Default

I sprayed carb cleaner around the EGR while the car was running to see if it would surge, but I never could get it to happen. Does that work on this car? It worked on my silverado around the intake one time showing I had a cracked intake gasket.
st041986 is offline   Reply With Quote
Old 04-11-2010, 12:56 PM   #17
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

If you are still getting the P1406, then the EGR Pintle is still complaining. If that'* still is present, the it'* time to swap the EGR. Holler if you need one cheap.
BillBoost37 is offline   Reply With Quote
Old 04-11-2010, 01:06 PM   #18
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'll go with Bill here, swap out the EGR, it'* easy and cheap. If your still having problems then you may need to remove the EGR tube from the valve to the LIM. They can crack and spraying them don't always find the leak.
Danthurs is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
04 Impala rough Idle and hard warm engine starts ngehrke Chevrolet 4 03-26-2013 10:28 AM
hard starting, rough idle ttjj1410 Buick 2 03-18-2012 02:00 PM
95 SE erratic idle, hard starting, stalls, no Check engine rockken_cosworth 1992-1999 14 08-22-2007 10:57 AM
P0125 code, hard starting, and high idle speed. big_news_1 1992-1999 10 10-24-2006 08:29 PM
Ignition/fuel problem (hard start/stalls/rough idle) 1992 trofeo 1992-1999 43 04-02-2004 05:24 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 03:34 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 Amazon.com and affiliated sites.