Seeking Suggestions on my 454 Swap

[lamogo33]

I repinned the ECM connectors from my 1990 ECM (1228747) for a 1994 ECM (16197427). With the right diagram and the new connectors, it was a piece of cake. Here is where I got the info for mine - http://www.gearhead-efi.com/Fuel-In...ersion-PCM-Swap-with-Wiring-Pinout-Directions!

There are some small harness adapters out there for the IAC and TPS to make the 350 TBI wiring plug-and-play with a 454 TB.

Thanks! I came across that thread yesterday and have printed it out and have studied it. This morning I purchased new red/blue connectors and the adapter for the IAC. As soon as the arrive I'll dig into it.

BTW is your truck a 700R4 truck? If so did you get the TCC lockup to work with the computer? Seems there is conflicting information about it working with the 427 ECM.

 

[Chewy1576]

My truck has an NV4500, so I don't have to worry about TCC lockup, but I found another thread on Gearhead EFI that deals with it - http://www.gearhead-efi.com/Fuel-Injection/showthread.php?43-16197427-and-a-700R4. Looks like you'll need a custom chip with changes to some of the transmission parameters, but it seems to be possible.

 

[olduglyforeman]

I Just did a 94 to 92 cab swap had to change the dash wiring computers all of it . Cluster everything was different even cut firewall for the larger plug for computer harness. Took a day to rewire . Worked great until owners nephew plowing snow wasnt stopping in reverse broke everything so bad the output shaft locked up.

 

[lamogo33]

I Just did a 94 to 92 cab swap had to change the dash wiring computers all of it . Cluster everything was different even cut firewall for the larger plug for computer harness. Took a day to rewire . Worked great until owners nephew plowing snow wasnt stopping in reverse broke everything so bad the output shaft locked up.

That does sound like a lot of work. I hope just repining my current harness will solve it for now.

Sorry about it going south on ya. Might be picking your brain later if I continue to have problems. See ya!