Still Yet another problem with my 92 lumina apv

Okay, here is the deal....I had all of the plugs replaced, new cap and rotter, and a new oxygen sensor. Yet, my car still runs poorly. After it get to normal running temp, it shakes slightly when I am between 35-40 mph, but stops when I take my foot off the gas pedal. Someone thinks it is the EGR valve or control. He bypassed the valve, and it seems to help, but does it once in a while still.......HELP!!!!

Try unplugging the Torque convertor lockup and see if it changes anything.

follow jeff's advice, I agree it sounds like a TCC sticking. The switch is on the front of the trans, toward the top. It's a square, 4 wire connector.

where would that be, I have no idea.

If you are looking under the hood, to your right is the transmission. On the side facing you, there will be a plug going into the case, with four wires arranged like this:

00
00

You pull that plug, and it will disable the TCC. It will also make the service engine light come on. Don't worry about that. See if that corrects the problem. If so, check around for a price for a TCC solenoid replacement.

The car can be run like this, but will have a slight fuel milege loss without it functioning.

I've had a similar problem for about 2 yrs, that kept getting worse. I have a 1992 Lumina APV, 3.8L, 4T60E Auto Trans. 132K miles.

It would start up fine when cold. After it warmed up, it would die on the road. I found that if I waited at the side if the road, it would start again. I flashed the check engine light and found no trouble codes. I suspected spark or fuel, but always had it when I checked it at home. Also, when I got on the freeway in 3rd or 4th gear, the engine/trans would buck and hickup and randomly stall for a split second when the torque converter would lockup (TCC solenoid). I thought I may have more than 1 problem going on.

I removed the ignition module thinking that may be causing the stalling problem and had it tested several times at a local Autozone parts store. It passed every time. No progress on the stalling.

So I switched problems and focused on the bucking. Having read before that sometimes the TCC solenoid goes bad, I inquired at the AutoZone about a TCC for this car. The counter salesman said he did not sell this part and the only part he sold was a vehicle speed switch. He then said "sometimes the motor will stop if this sensor goes bad". I bought it, $45, and installed it. It goes in the tail shaft of the trans. I noticed, when I pulled the old one out, it had a build up of band/clutch debris on the face of the sensor pickup. I installed the new one anyway but the clutch debris accumulated on the pickup face could have been the whole problem with the VSS sensor.

Now the van does not buck and has not stalled for a couple weeks. I would have never guessed this one.

I finally got my lumina apv fixed. It was just spark plug wires. I did not even think about them, since they were supposedly changes less than a year ago. But they weren't, and if he did, it was with old wires.