Engine racing

Hi fannie , Lil Sis will be back on the road in no time at all and where are you at with big Red its been awhile

 

We both have been down with a really bad cold...coughing, face running stuff... hubby looked bad too. Anyway we are both starting to get back on our feet again.
This afternoon hubby had a go at cleaning the throttle body and the pintle. He said it was BLACK! He cleaned everything off but the engine light was still on but it did go out a bit later. He took Lil Sis to the garage, the guy put the decoder on and got two readings, codes 26 and 39 neither of which are in his code book.

Any ideas?

 

If the 3300 is VIN 'N,' then this page will have your car's specific codes:

http://www.troublecodes.net/GM/89-91_33N_mfi/

Based on the quad driver code (26) and the TCC code (39), there is a possibility there's a TCC control problem, as it is engaged electronically. A diagnostic tech needs to go after this to determine if the quad driver in the PCM is having problems, necessitating replacing the PCM. This is my guess only, which I base on my experience with FWD GM cars.

 

What does VIN'N mean? Sorry for my ignorance.

Thank you for your help I will pass this info along. Stay tuned.

 

The engine is identified by the 8th digit in the VIN.
The 3.3L (3300) V6 is identified by engine code "N".

 

I followed the link, thank you, but still need to understand these acronyms.

TCC= Torque Converter Cutch and PCM= Powertrain Control Clutch

Do we have this correct?

 

TCC, yes. PCM means "powertrain control module." It's your engine's brain box. The PCM has an electrical circuit called a "Quad driver;" this is like a small handful of relays that control electrical power for high-amperage circuits such as solenoids. The TCC is engaged by one side of the quad driver energizing a solenoid, which acts on the fluid in the torque converter, causing the clutch to lock up, giving you a true mechanical connection through the trans for better fuel mileage.

 

My Model T was sort of an automatic. The brain box for it sat a few inches behind the steering wheel.
My newer car scares the crap out of me with all the brains and computers in it. Still from what I've seen on the highways there are few active brains behind the steering wheels.
Good luck to you fannie and Mr fannie.

 

Did the brainbox ever have a problem with its actuator turning the crank handle and experiencing kickback? My dad told me lesser men ended up with broken arms from that.

 

And Fannie, how's Li'l Sis driving now?

 

So it is possible that there may be a circuit failure? We were thinking that it was in the torque converter. So I do need to find someone who can decipher where the actually problem really is.
Thanks again for your help.

 

Yes, you do need to take Li'l Sis to a trusted and competent shop that can handle electrical and driveability issues. One other thing: if you do take it to a shop, have them find out if there is a superceding computer and/or EPROM for the computer. GM OBD-1 computers have a separate EPROM chip for each computer, and if the factory has made running changes in either, you need to make sure that the shop orders the superceding part, or you may end up with the same problem down the road.

 

But Li'l Sis hasn't had any racing/stalling issues since it was cleaned?