[ShelbyDodgeImp]

What trans do you have?

[John Wood]

Lakitu, on Aug 26 2007, 06:34 PM, said:

My Lebaron has started to act a little funny lately, it runs pretty good and everything, but once and awhile at low speeds, if I'm braking it will stall. I start it back up and it starts fine and runs fine, it'll just kill randomly when braking at low speeds sometimes. I think it may be the speed sensor is not working properly, from what I've read on this site and some others. However, the chilton manual I have does not show where it is located. Anyone ever have this problem, or know where the sensor plug is located at so I can test it? Thanks

We need to know the engine/transaxle setup on this vehicle. Is it a 3 speed tranny. Do you have a code 15 stored in the engine computer?
Is your speedometer needle dropping to zero just as the stall is occurring? If not, it is probably not the speed sensor, but let us know.

[valiant67]

By 1994 the LeBaron convertible only offered the 3.0 A604 combination.

[ShelbyDodgeImp]

I am not sure there is a way to test those sensors, because they can cause all kinds of problems from being merely out of range.

http://dodgedynasty....m/a604/a604.jpg

That diagram shows speed sensor locations for the early years, not sure if 94 was still this way or not.

[ShelbyDodgeImp]

Going by memory the two sensors are the same part# but my memory is off at times so I would check first with the parts counter.

[george w]

If your speedometer reads properly then your speed sensor is OK. The stalling when returning to idle from road speed is most likely caused by a dirty throttle body, especially in the AIS passage and the AIS pintle itself. There could also be a big build up of carbon crud in the intake manifold just beyond the T.B. The EGR passage dumps out here and quite a pile of junk can build up around it. Remove the TB from the car and give it a thorough cleaning. An old toothbrush is a big asset in this process. Spraying throttle body cleaner in the opening with the TB still on the car really doesn't clean enough to be worth the bother. You really need to take it off the car which is really quite simple.Whatever solvent you use to clean the TB should be kept out of the TPS and the AIS motor. It's best if you remove the AIS and clean the pintle tip and shaft with the toothbush and a cloth dampened with solvent, taking care to keep the solvent out of the AIS motor. Look inside the intake plenum opening when the TB is off and make sure it's clean too.
This will very likely restore proper idle characteristics and eliminate stalling.

[Hemi-Dude]

Lakitu, on 26 August 2007 - 04:49 PM, said:

Yeah it's a 3.0 a604. I never really notice the speedometer cause I haven't looked at it when it stalls, and I've tried to recreate the stall but I can't. I don't know if this has anything to do with it, but it seems to occur when I'm turning, like into a parking lot or driveway. I think I heard that turning can sometimes cause stalling if components are failing or something, but I don't know if it's just happening because you slow down when you turn. Anyways, anyone know the location on the a604 so I can test the sensor?

The 3.0L is prone to stalling due to a dirty throttle body. Have you checked it and cleaned it thoroughly with carb cleaner? You might try this before pursuing the distance (speed) sensor.

[Marcos]

Lakitu, on 27 August 2007 - 10:42 AM, said:

Well, I checked out that sensor, and It's a two prong sensor, compared to the 3-prongs that partsamerica.com says it is. So..any ideas?

After '92, they eliminated the extra vehicle speed sensor (3-prong) on the a604 and just had the TCM output a signal that mimicked what the old sensor would have supplied. The TCM was already looking at the output speed sensor (2-prong) so it just calculates vehicle speed using the pinion factor that must be set using a scan tool, and provides the signal. That's probably why the part numbers are the same, but there is actually only one sensor that performs both functions.

3-speed autos, and 5-speed manuals still use the VSS.