Moving from 1227747 What is the best TBI ECM to use?

[kilohertz]

Regarding the engine harness, are the Blue/Red connectors only available on the 94-95 trucks as well? If not, what years were the Red/Blue type connectors used and in what vehicles? Just trucks? Cars also?

Thanks!

[dave w]

1993 Pickups, Vans, and Suburban's with 4L60E Transmission also used PCM's (16168625) with the Red / Blue Connectors.

dave w

[stew86MCSS396]

Soooo happens I was given a Poncho 350 that supposedly has been gone through with new bearings/rings and a performance cam. Gonna attempt to run a TBI on top of Edelbrock spreadbore intake with an adapter. Have couple of Poncho HEIs here and still in the process/research of swapping out the guts from an Chevy EFI HEI into it. Another thing on the horizon is rebuilding a trans that has a BOP bellhousing which would be a CZF 200-4r. My feelings are torn on using the 427 although it's leap and bounds faster, so far I'm 0 for 2 using it to control TCC on a 700r4. I know you're using a manual trans so this is moot. I've read every possible thread about setting it up but can't seem to get it to work correctly. It's not that it's not working, it appears to lock up all the time as soon as it makes 1-2 shift. Right now using 4th gear pressure switch to energize TCC only in 4th but as soon as the 3-4 shift happens, it immediately locks up no matter what the speed is. I didn't do any of the wiring on either swaps but did double triple quadruple checked it to be correct. Whats weird is on the datalog, you can clearly see the TCC being commanded on/off at programmed speed but in reality that's not happening. It's like I have a internal short at all times. Sorry for the off topic rant... Speaking of red/blue connectors, you can still order them from Mouser...
http://gearhead-efi.com/Fuel-Injecti...CM-Plug-source

[tayto]

i would check your internal lockup harness in the trans and map it out. might need to find a different harness or rewire

[stew86MCSS396]

Dont see how that can be the problem when the tcc worked as advertised with the original ECM.

[tayto]

you talk about a 2004r, then a 700r4. you also never mentioned it worked before and now it doesn't. the 7427 will control a "lock up only" transmission (700r4/2004r). if it's locking up immediately as soon as you shift into 4th, then it's probably wired that way internally. OR you have the TCC signal wire grounded (check that its on the correct pin) most ECM controlled TCC have 3 wires power, tcc signal, and "high gear" switch aka 4th gear switch. there is no physical connection between the 4th gear switch and the tcc solenoid aside both housing being grounded.

[kilohertz]

Look what I found yesterday! The wrecker had over a dozen of these, had to decide which 2 I thought would be the best, this is the first standard BIN I have seen. I just need to find a complete harness and I can start the conversion.

Let the games begin....finally, I am moving into the 90's

cheers

[In-Tech]

If these files aren't already in the archives, please read both memcal's and post the .bin files :)

[kilohertz]

Will do. I looked in the archive and I didn't see either of these. I'll post them here and whoever knows how to get them to the archive can move them.

Cheers