Stalling when coming to a stop

Have a flashing light? Gauges acting funny? Bad idle? Get your problems solved...
Post Reply
CorvetteBeretta
Registered User
Posts: 423
Joined: Thu Mar 06, 2014 10:28 am
Location: New West B.C. Canada

Stalling when coming to a stop

Post by CorvetteBeretta »

Car starts and runs fine but after driving and coming to a stop it stalls, if I tap the gas a few times it idles. I just changed the fuel filter but no luck I also did an idle re learn. Maybe a bad iac or tps? It is SUPER ANNOYING! especially at a busy intersection when people are looking at the car and it dies....... :O: I just wanna screeeeeeaaamm!! lol :beer:


Image
User avatar
Asylum
Registered User
Posts: 3050
Joined: Wed Mar 31, 2004 9:36 am
Location: Hamilton, Ontario, Canada
Contact:

Re: Stalling when coming to a stop

Post by Asylum »

If you haven't already, unplug the TCC solenoid.

Square plug on the front of the trans down below the throttle body.


Eric

Asylum Motorsports
"Where we're not happy 'til YOU'RE not happy!






'91 California Quad (Gone with just a bit of "Seller's Remorse".)
'92 3500 GT gone and not really missed. It was fun. Documented 13.47 N/A.
CorvetteBeretta
Registered User
Posts: 423
Joined: Thu Mar 06, 2014 10:28 am
Location: New West B.C. Canada

Re: Stalling when coming to a stop

Post by CorvetteBeretta »

I have a standard


Image
User avatar
Money pit Beretta
Registered User
Posts: 6411
Joined: Thu Jul 26, 2007 11:36 am
Location: Kansas

Re: Stalling when coming to a stop

Post by Money pit Beretta »

I'd go with the IAC.


keep'em flying!
CorvetteBeretta
Registered User
Posts: 423
Joined: Thu Mar 06, 2014 10:28 am
Location: New West B.C. Canada

Re: Stalling when coming to a stop

Post by CorvetteBeretta »

I recently put in a new throttle body when I did the car sounded better and idled better but stalled so I just put my old iac in and it idles at like 2000 rpm changed it back to a spare I had and it idles pretty good but stalls


Image
User avatar
Money pit Beretta
Registered User
Posts: 6411
Joined: Thu Jul 26, 2007 11:36 am
Location: Kansas

Re: Stalling when coming to a stop

Post by Money pit Beretta »

I thought you did, not able to keep tack of things like in the old days. A 2000rpm idle most of the time is the TPS, for you it seems to be an air leak or could be EVAP related.


keep'em flying!
CorvetteBeretta
Registered User
Posts: 423
Joined: Thu Mar 06, 2014 10:28 am
Location: New West B.C. Canada

Re: Stalling when coming to a stop

Post by CorvetteBeretta »

Im getting the bad idle when I swap my iac between my 3 iacs I have its either high idle or stalling


Image
CorvetteBeretta
Registered User
Posts: 423
Joined: Thu Mar 06, 2014 10:28 am
Location: New West B.C. Canada

Re: Stalling when coming to a stop

Post by CorvetteBeretta »

I have also read a few ways to do the idle re learn some say max of 10 mins and some say rad fan must cycle


Image
User avatar
Money pit Beretta
Registered User
Posts: 6411
Joined: Thu Jul 26, 2007 11:36 am
Location: Kansas

Re: Stalling when coming to a stop

Post by Money pit Beretta »

Stupid question: are they clean and is the port clean? Another: Did you play with the throttle set screw?
You could try that, there is a guide somewhere online.


keep'em flying!
CorvetteBeretta
Registered User
Posts: 423
Joined: Thu Mar 06, 2014 10:28 am
Location: New West B.C. Canada

Re: Stalling when coming to a stop

Post by CorvetteBeretta »

when I change iac should I do idle re learn? might be a stupid question..I never did


Image
User avatar
Money pit Beretta
Registered User
Posts: 6411
Joined: Thu Jul 26, 2007 11:36 am
Location: Kansas

Re: Stalling when coming to a stop

Post by Money pit Beretta »

I never have, even after the big bore TCE. It has worked well for others though.


keep'em flying!
User avatar
Rettax3
Registered User
Posts: 1805
Joined: Mon Oct 22, 2012 3:34 pm

Re: Stalling when coming to a stop

Post by Rettax3 »

Money Pit hit it, I think. Swapping out the TB, you likely have to adjust the minimum idle set screw. Tweak that thing up a little, just until the IAC can close enough to keep the idle where you want it warm AND cold. I know your car is a bit like most of mine -slightly hodge-podged, so the next question is if your ECM (and more importantly the PROM) is originally for an auto or manual trans -that can cause a stalling problem too, especially after decelerating using engine compression braking, since the auto ECM PROM will be closing that IAC trying to bring that high 'idle' down since it doesn't know why it is running so high. That and clean the TB, particularly the IAC pintle seat and air passages. If nothing else helps, consider getting a new IAC since you seem to be trading off one problem for another switching the ones you have back and forth, and finally check all the wiring -look for corrosion one the pins at the ECM and damage to the wires themselves. Good luck.


1989 SuperCharged 3800 Srs-II (First)Six-Speed GTU
1990 Turbo 3.4 5-Speed T-Type
1990 4.0L 4-Cam 32-Valve V-8 5-Speed Indy GTi (Project)
1990 Stock(!) 3.1 MPFI Auto Indy
1995 LA1/L82 4T60E Z-26
1995 3.4 DOHC Turbo 5-Speed Z-26
1988GTU
Registered User
Posts: 2744
Joined: Sat Mar 23, 2002 1:06 pm
Location: A town up north

Re: Stalling when coming to a stop

Post by 1988GTU »

my proposal is icm or ecm.


_________
Image
-------------
CorvetteBeretta
Registered User
Posts: 423
Joined: Thu Mar 06, 2014 10:28 am
Location: New West B.C. Canada

Re: Stalling when coming to a stop

Post by CorvetteBeretta »

I changed the icm already plus coil packs ecm is original and the car was always a standard


Image
1988GTU
Registered User
Posts: 2744
Joined: Sat Mar 23, 2002 1:06 pm
Location: A town up north

Re: Stalling when coming to a stop

Post by 1988GTU »

Swap it with a known good memcal and unit assembly.


_________
Image
-------------
Post Reply