97 olds 88 3.8 stalling - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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

Reply
 
 
 
Thread Tools Search this Thread
Old 12-10-2014, 08:24 PM   #1
Senior Member
Posts like a 4 Banger
Thread Starter
 
Join Date: Dec 2014
Posts: 116
Thanked 11 Times in 8 Posts
ImJohn will become famous soon enough
Default 97 olds 88 3.8 stalling

Hey guys, got a 97 olds 88, that will randomly stall, like it was turned off, it also has another issue, i call, Insta-start

when starting cold, all i need to do is bump the starter, and it'* running instantly, no cranking and cranking, starts on first spark... but when its warm, like go into store, and back in 5 minutes, it will insta start, but die, hit the starter, and has to crank over several times before it will start, then idle goes high and then normal

I cleaned the throttle body and butterfly, and the idle motor cone thingy, and was getting a clattery sound from the idle motor, so I put some oil on it and the spring area, no sound comes from that now, but still have insta start and hard to start hot, and intermitinant stalling, i turned in the idle stop screw and helped the stall issue, but still does it randomly, I have also cleaned maf sensor with maf cleaner, also unhooked battery, 30 min, then started car and let idle in drive until cooling fan came on to let it learn idle, turned off and restarted.. idles at right rpm and all, no codes, no check engine lights on,

checked all vacuum hoses, replaced the two little ones down on trans modulator, shifts very smooth and no vacuum leaks anywhere

two months ago, i had to replace middle coil pack, from misfires, had bad coil when checked with volt meter, 30 bucks and replaced coil and wires

car has 78 k, have replaced upper intake gaskets and new plenum (dorman)

car runs perfectly, except above issues

How can i reset the Stop Screw? fix Idle random stall, insta start? hard to start when hot issues?

any advise appreciated

I do have a volt meter
I have ran fuel injector cleaner threw several times
ImJohn is offline   Reply With Quote
Old 12-10-2014, 09:52 PM   #2
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

1st off, that idle set screw isn't supposed to be adjusted. Not even at the dealer level. Why it'* their is beyond me. Even the FSM says not to mess with it. All idle is controlled via the PCM. Again, never adjust that screw. So, put it back where it was originally.

Your stalling is due to some other factor besides that set screw. Again, put it back.

Read this and see if it applies to you...
https://www.gmforum.com/electrical-1...1999-a-303224/
Mike is offline   Reply With Quote
Old 12-10-2014, 10:56 PM   #3
Senior Member
Posts like a 4 Banger
Thread Starter
 
Join Date: Dec 2014
Posts: 116
Thanked 11 Times in 8 Posts
ImJohn will become famous soon enough
Default

the pics are missing on the ground message.. but will look

as far as screw stopper, no idea where it was set
ImJohn is offline   Reply With Quote
Old 12-11-2014, 08:30 AM   #4
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

when its warm and going to do the long crank see if it starts easier with like half throttle, this bypasses the iac, and will point you in that direction or if not somewhere else
jwfirebird is offline   Reply With Quote
The Following User Says Thank You to jwfirebird For This Useful Post:
Soft Ride (12-11-2014)
Old 12-11-2014, 11:13 AM   #5
Senior Member
Posts like a 4 Banger
Thread Starter
 
Join Date: Dec 2014
Posts: 116
Thanked 11 Times in 8 Posts
ImJohn will become famous soon enough
Default

Quote:
Originally Posted by jwfirebird View Post
when its warm and going to do the long crank see if it starts easier with like half throttle, this bypasses the iac, and will point you in that direction or if not somewhere else
yes indeed, that is what I do, just push down on gas pedal and fires right up
ImJohn is offline   Reply With Quote
Old 12-11-2014, 11:28 AM   #6
Senior Member
Posts like a 4 Banger
Thread Starter
 
Join Date: Dec 2014
Posts: 116
Thanked 11 Times in 8 Posts
ImJohn will become famous soon enough
Default

so, do I need to replace IAC motor? after cleaning the throttle body, the IAC was making serious clattering noise, so I removed it, did some extra cleaning and took a scuff pad to the tip, then used a little motor oil to lube it, the tip and the spring on the back side, placed back into TB and fired right up, no clattering since, but still had insta start and and when hot, it was still harder to start, as if flooded, crank, hit and stuble to die, then crank for 2 or 3 turns before starting, reving high and then back to normal, if you press on the gaspedal a little, it fires right up when starting hot
ImJohn is offline   Reply With Quote
Old 12-11-2014, 03:11 PM   #7
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

thats what it seems like to me if you have already cleaned where the iac seats. i would put the tb screw back were it was too that may just goof up the pcm. idle air and rpm is controlled by the iac only. the butterfly controls from after idle to WOT.
jwfirebird is offline   Reply With Quote
Old 12-11-2014, 04:00 PM   #8
Senior Member
True Car Nut
 
Soft Ride's Avatar
 
Join Date: Jan 2012
Location: BC Canada
Posts: 3,588
Thanked 340 Times in 302 Posts
Soft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud of
Default

Since a new IAC is required, I would buy Delco IAC only.
Soft Ride is offline   Reply With Quote
Old 12-11-2014, 04:40 PM   #9
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

delphi or delco i normally get, both are like oem. its only like 30 bucks vs 20 on rockauto, seems worth it to me. alot of the cheaper parts dont run right or last long
jwfirebird is offline   Reply With Quote
The Following User Says Thank You to jwfirebird For This Useful Post:
Soft Ride (12-12-2014)
Old 12-13-2014, 12:30 PM   #10
Member
Posts like a V-Tak
 
Join Date: Nov 2014
Location: spokane , wa.
Posts: 31
Thanked 1 Time in 1 Post
Twinpilot is on a distinguished road
Default

thinking of column =ignition switch??
Twinpilot is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1994 Olds 88 stalling issue wgcdc Oldsmobile 13 04-09-2015 05:42 PM
1985 olds calais stalling dkisdatrump Oldsmobile 10 01-31-2015 10:15 PM
95 Olds 88, stalling out, sputtering. adamdavidson Oldsmobile 10 03-13-2014 09:46 PM
1994 Olds 88 stalling bigchieftaco Oldsmobile 19 08-16-2012 09:33 PM
1994 Olds LSS stalling randomly, P1406 code - !!Fixed!! EGR KneeHowMa 1992-1999 13 12-18-2006 06:31 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 03:10 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.