Impala ls 2000 Stalls at high speed - Page 4 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Chevrolet When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made.

Reply
 
 
 
Thread Tools Search this Thread
Old 01-18-2014, 04:44 PM   #31
Senior Member
Posts like a Supercharger
Thread Starter
 
Join Date: Dec 2013
Location: right now venezuela
Posts: 176
Thanked 9 Times in 8 Posts
danihound will become famous soon enough
Default

is this hole normal?



is located in the back of the lower screw of the IAC valve.
Attached Thumbnails
Impala ls 2000 Stalls at high speed-fe2w.jpg  
danihound is offline   Reply With Quote
Old 01-18-2014, 04:47 PM   #32
Senior Administrator








Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Horseheads, NY
Posts: 15,649
Thanked 1,001 Times in 777 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

Yes, its made on purpose during the mfgr process, and its designed so when the hole is tapped, the tap can go all the way through the hole.
Mike is offline   Reply With Quote
The Following User Says Thank You to Mike For This Useful Post:
danihound (01-18-2014)
Old 01-18-2014, 04:55 PM   #33
Senior Member
Posts like a Supercharger
Thread Starter
 
Join Date: Dec 2013
Location: right now venezuela
Posts: 176
Thanked 9 Times in 8 Posts
danihound will become famous soon enough
Default

thanks man.

im asking cause i was checking the car since it didnt pass the test i was at more than 60 mph and it died again, double checked the upper intake did everything again, no coolant no nothing, also had no leaking or anything.

so i was checking for maybe some vaccum leak, and i noticed that the IAC valve sucks air from the sides of the plug, not the conection between the body and the iac, but in the plastic, putted some carburator cleaner and it sucked it O.o, same with some water.

is that ok?, im going to check the iac (theres no check engine light on).

i heard that if i disconect the iac valve and the idle works well then the iac is bad, is that correct?.
danihound is offline   Reply With Quote
Old 01-18-2014, 05:18 PM   #34
Senior Administrator








Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Horseheads, NY
Posts: 15,649
Thanked 1,001 Times in 777 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

No.

If its sucking air in where it mates to the TB, then your gasket probably gut sucked in or its not sealing well. Remove/inspect/replace.
Mike is offline   Reply With Quote
Old 01-18-2014, 05:45 PM   #35
Senior Member
Posts like a Supercharger
Thread Starter
 
Join Date: Dec 2013
Location: right now venezuela
Posts: 176
Thanked 9 Times in 8 Posts
danihound will become famous soon enough
Default

im uploading some vids and pics.

also sometimes it take time to start "long crank" or start and dies right away, i taked the iac valve conector and it started right away "but idled to 2 x 1000 rpm"
danihound is offline   Reply With Quote
Old 01-18-2014, 05:51 PM   #36
Senior Administrator








Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Horseheads, NY
Posts: 15,649
Thanked 1,001 Times in 777 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

Leave it connected, this time, crack the throttle open(I mean JUST a crack) and attempt to start. If it starts immediately, fault lies either with the IAC or its not opening all the way due to carbon buildup.
Mike is offline   Reply With Quote
The Following User Says Thank You to Mike For This Useful Post:
danihound (01-18-2014)
Old 01-18-2014, 05:51 PM   #37
Senior Member
Posts like a Supercharger
Thread Starter
 
Join Date: Dec 2013
Location: right now venezuela
Posts: 176
Thanked 9 Times in 8 Posts
danihound will become famous soon enough
Default

(sorry for the spanish the car is in venezuela, thats why is kinda hard to find a good GM mechanic most GM car here are those opel with new names *

Videos:

engine start:



and how the rpm dances alone

RPM - YouTube

also here its from where the air comes in:



it didnt take air from the conection between the upper intake and TB but from my inexperience point of view it looks like theres an small gap between the two but again i dont know if its like that.
Attached Thumbnails
Impala ls 2000 Stalls at high speed-3mkf.jpg   Impala ls 2000 Stalls at high speed-3mkf.jpg  

Last edited by danihound; 01-18-2014 at 05:54 PM.
danihound is offline   Reply With Quote
Old 01-18-2014, 05:54 PM   #38
Senior Administrator








Certified Car Nut
 
Mike's Avatar
 
Join Date: Jul 2003
Location: Horseheads, NY
Posts: 15,649
Thanked 1,001 Times in 777 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

If the leak is right where the arrow points, then its time to replace the IAC. You'd be surprised at how much chaos a little vac leak can cause.
Mike is offline   Reply With Quote
The Following 2 Users Say Thank You to Mike For This Useful Post:
danihound (01-18-2014), Soft Ride (01-18-2014)
Old 01-18-2014, 06:00 PM   #39
Senior Member
Posts like a Supercharger
Thread Starter
 
Join Date: Dec 2013
Location: right now venezuela
Posts: 176
Thanked 9 Times in 8 Posts
danihound will become famous soon enough
Default

those iac valves are cheap i could buy one and test it.


also thanks for all the help, you are really good and helpful.
danihound is offline   Reply With Quote
The Following User Says Thank You to danihound For This Useful Post:
Mike (01-19-2014)
Old 01-19-2014, 09:42 AM   #40
Senior Member
True Car Nut
 
jwfirebird's Avatar
 
Join Date: Dec 2009
Location: western,ny state
Posts: 9,616
Thanked 563 Times in 481 Posts
jwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond repute
Default

just out of curiosity why do you have a zip tie on the vacuum boot there? if it looks dry rotted or anything that will give you issues in the future as well. the fuel pressure is regulated by that and the evap purge goes into there. you will have evap code and poor running if its hard and brittle
jwfirebird is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
2000 LS impala 3.8 stalls danihound Chevrolet 26 06-28-2014 11:08 PM
04 impala stalls and runs ruff jonkamholtz Chevrolet 8 07-01-2012 12:24 PM
Anyone have an Impala or Impala service manual 92BonneSE Lounge 7 05-28-2007 01:53 AM
1998 stalls at highway speed jds 1992-1999 4 03-11-2006 12:31 PM
6 speed Impala ss dbeast420 Lounge 5 02-16-2006 12:21 AM


Tags
fuelpump, highspeed, impala, stall

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 04:03 PM.


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.