c4boom

i need to figure out how i can run a carb on my truck for a few months it has a 747 ecm. i would like to keep the stock dizzy and just throw the carb on as a temp till stuff comes together. thanks ahead of times guys

Z69

There is a file called 7747sprk.txt on DIY-efi.org.

Not much needs done other than turning off some DTC's.
And making a TPS bracket for your carb....
Unless you make a cable op thingie like S&P or somebody sells.
A manual choke holley looks to be reasonably easy. Just make a mount plate to go on the manual lever plate and a rod to screw into the primary throttle shaft with a flat on the other end to turn the tps. I'll be doing one in a month or two.

Grumpy

You sure, about the TPS?.
As I recall, it's not needed.

Z69

Correct, not required IIRC from the txt file or somewhere.
Maybe it was one of your posts.
But nice to have, and I have 8D stuck in my head.
I don't recall how PE is done in 747 land.

Grumpy

Ooops, I forgot some people use a PE spark adder.

RBob

iTrader: (1)

With a carb it is better to put any PE type spark in the main SA table. In this manner it can be setup to coincide with the power valve or step up rods activating (via manifold pressure).

RBob.

BMmonteSS

I used Rbobs spark only tutorial for quite a while on my car while I got the hang of this chip tuning thing. It's quite easy. Just follow his article and it will tell you what dtc to turn off and what other parameters to play with. The tps is not needed, unless your wanting to use the TCC lock up, there is a flag that makes it MPH based but I never played with it.