I need two pinout diagrams.... one for the 1227747, and also for the 1228062. Does anyone here have these that they can send, or post? Thanks.....

 

Check out the ftp server on www.diy-efi.org

 

Got the 7747... No dice on the 8062.....


Anyone? Please?

 

Talk to a local mechanics shop. They usually have the stuff on a computer which they could print out for you. This is how I get most of my pin-outs if it isn't on the web.

 

Xfire, did you ever find out the pins for the 8062? Some people on here say they are the same and you can just swap in the computer, but I want to be sure.

Thanks

 

If its based on the run of the mill C3 then it should be the same. My 8063 is the same as the 7747, 8746, etc. The hardware is identical on most of the tbi computers. The only thing is that there may be a few pins that will be unused on some computers, like the A/C clutch drive and such, as the code wont support that feature or features. You could always check to be sure.

 

Swapped in the 7747 and it seems to run a little better with my timing mismatch issue. Hooray for 4.3 Vans! A/C clutch does work!

So far so good. Just need to send it off to craig and have him solder in an adapter.

 

The 7747 supports the A/C cluch IIRC. The fbody ecms dont.

 

How does the A/C operate on fbody tbi's then? I know it came with!? Just with the Hvac controls?

 

Just off the HVAC head. Some of the trucks are the same way. Some later models have the fancy A/C that turns off and on in response to engine load. I think the 7747 just energizes the clutch when the A/C is requested. Could be wrong about that.