Monte Carlo Repair Help Have a Monte problem and need help? Good at troubleshooting? Discuss it here!

6th Gen ('00-'05): Rough idle and stalling

  #1  
Old 09-22-2018, 10:57 PM
3 Year Member
1 Year Member
Thread Starter
Join Date: Mar 2015
Location: Vegas Baby
Posts: 40
Default Rough idle and stalling

I've got a 2000 ls that is idling rough and has a delayed acceleration and it has a P0172? Rich stft bank on code. So far I've cleaned and tested the maf, new air filter, cleaned throttle body, tested the iac, tps sensors, checked for air leaks between maf and throttle body. I have a scanner that does live data and tthe fuel trims are really far apart at idle stft=3.8 ltft=-14.8. if anybody can give me suggestions on where to look next it would be greatly appreciated.
 
  #2  
Old 09-22-2018, 11:01 PM
Monte Of The Month -- April 2012
Monte Of The Month -- December 2014
10 Year Member
5 Year Member3 Year Member1 Year Member
Join Date: Sep 2008
Posts: 3,006
Default

Try another MAF.
 
  #3  
Old 09-23-2018, 05:11 AM
drivernumber3's Avatar
Monte Of The Month -- May 2015
Monte Of The Month -- March 2017
5 Year Member
3 Year Member1 Year Member
Join Date: May 2013
Location: Nebraska
Posts: 4,208
Smile

Well with all the stuff you have done I am thinking that you have a Vacuum leak some place.
This car may have the 3400V6 and I have a Pontiac that has the same motor. Rough idle and same symptoms.
So awhile back after the shops all check this problem out and couldn't find anything.
I was checking the Vac lines and I found one on the left side of the engine near the Power steering.
It's about a 3/8 " tube or larger and was covered by a rubber foam hose to protect it this had a big crack in it. I removed it and found the vac hose inside and was disconnected. I reconnected it and fixed it with tape to seal it.
No more rough idle.
This may not be the same one that is on your engine.
But you might want to check those Vac lines.
Hope it helps.
 
  #4  
Old 09-23-2018, 10:06 AM
3 Year Member
1 Year Member
Thread Starter
Join Date: Mar 2015
Location: Vegas Baby
Posts: 40
Default

Thanks drivernumber3 I guess I'll be vacuum leak hunting this morning! I Gotta stumble upon a solution eventually right?
 

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

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.