1982 corvette

[mitch]

I have a 1982 corvette with crossfire fuel injection and have been getting stalls after the car comes off of the highway. The car runs great at highway speed but then stalls at the first traffic light after leaving the road.

The following systems have already been checked relative to this problem and have not provided any significan improvement: -Replaced intake air control motor -Distributor (and related parts), spark plugs, wires, coil -Fuel pressure and fuel filter -Plenum with no signs of warpage or leaking -Computer connnections and wiring and any of the sensors we are aware of.

I know the crossfire system is problematic but if anyone can suggest something, it would be greatly appreciated.

Thanks!!!

[Joe Lucia (12484)]

Re: 1982 corvette

Mitch----

The symptoms that you describe can often be caused by a transmission/torque converter problem. If that is the problem here, eventually, after restarting after a stall, you will not be able to engage the "drive" position without repeated stalling. This type of problem is not that uncommon on THM 200 and 700R4 transmissions with lock-up torque converters.

[Joe Lucia (12484)]

Re: 1982 corvette

Mitch----

The symptoms that you describe can often be caused by a transmission/torque converter problem. If that is the problem here, eventually, after restarting after a stall, you will not be able to engage the "drive" position without repeated stalling. This type of problem is not that uncommon on THM 200 and 700R4 transmissions with lock-up torque converters.

[Terry McManmon (3966)]

Re: 1982 corvette

Guys,

Torque convertor lock up problems are a plague on automatic overdrive transmissions, and not just GM units. Often the symptoms are as described. Once the engine dies all the pressure is off in the transmission and the torque convertor clutch is released until the next high speed operation.

I am not familiar enough with these transmissions to give sopecific advice, however in general it is often possible to check the ohm reading of the torque converter lock-up solenoid from the electrical connection on the outside of the transmission. The appropriate service manual would be invaluable here. Sometimes these solenoids are accessable with the transmission pan removed if replacement is indicated.

There is, I think, a torque converter lock up signal at the ADL diagnostic link under the steering column. At least that is where it is at on other GM cars - not sure about 1982s. In 1980 the ADL was under the ash tray, but I think that was the first year crazy location. Where ever the ADL is, a scanner will pick up this signal while driving and tell if that is the problem.

We are a little beyond the usual shade tree stuff here, but it is still not rocket science. If this is not enough to point you in the right direction send me an e-mail and I will do some research at school so that we can get specific. I think we are talking a TH700R4 here, but I am not even sure of that. This is jsut a little out of my league.

Terry

[Terry McManmon (3966)]

Re: 1982 corvette

Guys,

Torque convertor lock up problems are a plague on automatic overdrive transmissions, and not just GM units. Often the symptoms are as described. Once the engine dies all the pressure is off in the transmission and the torque convertor clutch is released until the next high speed operation.

I am not familiar enough with these transmissions to give sopecific advice, however in general it is often possible to check the ohm reading of the torque converter lock-up solenoid from the electrical connection on the outside of the transmission. The appropriate service manual would be invaluable here. Sometimes these solenoids are accessable with the transmission pan removed if replacement is indicated.

There is, I think, a torque converter lock up signal at the ADL diagnostic link under the steering column. At least that is where it is at on other GM cars - not sure about 1982s. In 1980 the ADL was under the ash tray, but I think that was the first year crazy location. Where ever the ADL is, a scanner will pick up this signal while driving and tell if that is the problem.

We are a little beyond the usual shade tree stuff here, but it is still not rocket science. If this is not enough to point you in the right direction send me an e-mail and I will do some research at school so that we can get specific. I think we are talking a TH700R4 here, but I am not even sure of that. This is jsut a little out of my league.

Terry