Thread: code 13 and 26

1988 Pontiac Grand Am 2.3l Quad 4:

If I put my car into gear too soon after starting it, it sets a trouble code 26 "Quad Driver Module". I recently replaced my computer because of other problems I'm still having. (no acceleration in reverse, bad gas mileage, code 13"O2 sensor", slow up hills, and poor acceleration from a stop). I recently replaced my computer, oxygen sensor, spark plugs and wires(boots). Could code 13 be being set either because there's a strait pipe where my catalytic converter was cut out from a previous owner, or from the bad leak where my exhaust pipes connect before the muffler? Could those things also affect my poor performance? I'm currently shopping for a catalytic converter and should have it on soon. I just noticed it was cut off. Thanks for your time.

Thanks for your response, I've got some new info on it.

Today while my wife was driving the car it wouldn't change gears at about 40mph, so she let off on the gas a little hoping it would shift, when she returned to push the gas it acted as if it was in neutral. After a minute it reengaged.

After researching this new symptom on the internet I found this is probably a Torque Converter Clutch Solenoid, which would cause the lack of power, bad gas mileage, code 26 and stalling (I forgot to mention that when we come to stop lights it acts like it wants to stall sometimes we have to put in neutral to keep it running).

So looks like this could be the problem, problem is I have no knowledge on this subject. If this sounds like it could be the correct diagnosis, could you share some insight on the TCC, anything will help. Where is the solenoid? How do I test it? How do I replace it if necessary? Where's the wiring, so I can check the ground and such?

Thanks