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TBI stalling issue.

Started by phillip637, November 03, 2012, 05:17:12 PM

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phillip637

I've mentioned this issue in my other thread but can't get it fixed so figured I start a thread on this specific issue.

1989 ramcharger 318 TBI

Stalls when coming to a stop/idle.

Does not stall if put in neutral when coming to a stop.

Codes: 15 vehicle speed sensor code.

Vehicle speed sensor controls how much the idle speed motor stays open when decelerating with closed throttle

Replaced vehicle speed sensor, and idle speed motor

No change with this issue, codes came back.

What do you guys think???
1985 Ramcharger 4WD 318/727/np208. 4bbl cammed headers
1989 Ramcharger LE 4WD 318TBI/727/np241
1990 W250 318TBI/A518/np241
2000 Dakota 3.9 magnum 2WD

phillip637

One more detail I forgot to mention it has a 727 automatic trans.
1985 Ramcharger 4WD 318/727/np208. 4bbl cammed headers
1989 Ramcharger LE 4WD 318TBI/727/np241
1990 W250 318TBI/A518/np241
2000 Dakota 3.9 magnum 2WD

mopar_daddy

#2
I would inspect the wire loom and make sure the vss has a good signal ground. Also inspect your kick down linkage and make sure the return springs are intact and pulling the TV closed at an idle.
91 RC 6 plus" lift,5.9 mag,456s,x over.
79 RC fully tubed front to back.Walker E glass,37s
83 W crew,cummins(soon 2 b Ramburban)
85 long box PR 12-14" lift on 40" Boggers
93/99 mutant dakota R/T (monster dakota)
98 Dakota R/T my DD
Many 60s mopar muscle cars

phillip637

we have already checked all that. we are gonna call an old freind that is very knowledgeable on TBI and see if he can shed some light on this.
1985 Ramcharger 4WD 318/727/np208. 4bbl cammed headers
1989 Ramcharger LE 4WD 318TBI/727/np241
1990 W250 318TBI/A518/np241
2000 Dakota 3.9 magnum 2WD

SixGun

I played with the idle speed screw on my 91 once and it acted similar to what you are describing.  I would drive it and after warmup when I came to a stop it would die.  I would have to rev it in neutral to keep it from turning off.  It progressively got worse.  Got smart and used the FSM procedute with a tachometer and that solved the problem.
"You may all go to Hell and I will go to Texas" - Davy Crocket

phillip637

it stalls when cold too and it has no problem idleing in nuetral and it can be in gear when stopped and it still idles fine, so its not idleing to low or loading up with fuel.
1985 Ramcharger 4WD 318/727/np208. 4bbl cammed headers
1989 Ramcharger LE 4WD 318TBI/727/np241
1990 W250 318TBI/A518/np241
2000 Dakota 3.9 magnum 2WD

mopar_daddy

Just for shits and giggles try down shifting it to make sure its not a valve body problem. Maybe sticking in second until complete stoped?
91 RC 6 plus" lift,5.9 mag,456s,x over.
79 RC fully tubed front to back.Walker E glass,37s
83 W crew,cummins(soon 2 b Ramburban)
85 long box PR 12-14" lift on 40" Boggers
93/99 mutant dakota R/T (monster dakota)
98 Dakota R/T my DD
Many 60s mopar muscle cars

phillip637

Not a lock up trans so valve body issues wouldn't cause this
1985 Ramcharger 4WD 318/727/np208. 4bbl cammed headers
1989 Ramcharger LE 4WD 318TBI/727/np241
1990 W250 318TBI/A518/np241
2000 Dakota 3.9 magnum 2WD

DODGEBOYS

yup the correct procedure would help



MOPAR TO YA!!!!!!!!!!!!!!!!



lets see how much trouble we can get in with RCC

phillip637

Fixed it. Problem was a simple connection. 4wd models there is a wire extender for the vss, it came apart and I just didn't see it until today it was hanging down from under the truck. Feel pretty stupid but oh well it's fixed now.
1985 Ramcharger 4WD 318/727/np208. 4bbl cammed headers
1989 Ramcharger LE 4WD 318TBI/727/np241
1990 W250 318TBI/A518/np241
2000 Dakota 3.9 magnum 2WD

SixGun

Don't you just love when it's an easy fix.   :thumbsup:
"You may all go to Hell and I will go to Texas" - Davy Crocket

phillip637

Just wish I could found this before I bough a new vss. I looked this thing over really good several times then the other day saw some wires hangin that I never saw before. Makes me feel dumb as hell, but oh well
1985 Ramcharger 4WD 318/727/np208. 4bbl cammed headers
1989 Ramcharger LE 4WD 318TBI/727/np241
1990 W250 318TBI/A518/np241
2000 Dakota 3.9 magnum 2WD