[Gmecm] TBI Swap - Iron Duke Tech IV

[Aphelion79]

First of all, I took everything off of the donor engine... its the same exact engine as I've got in my Jeep, but my Jeep is  carburated, and the Olds is Fuel Injected... so The Dizzy I took off of the Olds, the Intake Manifold/TBI, and all sensors will screw directly into my Jeep's block/head... so Yes, I did in fact take the distributor from the Olds, the only thing left out in the junkyard is the engine block/transmission lol... The distributor is a giant heatsink with two coils mounted to it, is all... and a shaft with an o-ring on it to plug the hole where the mechanical dizzy went...  For VSS, I do not need it do I?... my speedo is mechanical into my Transfer Case so I can just not use the VSS plug and cap it off / pull the wires, right?  VSS shouldn't send any info to the ECM that would deal with anything except shifting the transmission, and your MPH on the Dash Display, correct?
I am currently missing two sensors, the Knock Sensor, and the Crankshaft Position Sensor.  From what I can tell on the wiring diagrams any other sensors I either am not using, or already have!

I'll be tearing into the wiring harness tomorrow (Wednesday) to rebundle wires for my application/lable them and I will post any questions I have then...

Thx for the help all!
-Matt


QUOTE:

	For the 2.5, it would be bunches easier to just use the 2.5 TBI
	distributor...
	For the 250, Use the HEI distributor, swap in a 7-pin module in place of
	the 4-pin, lock down the advance, and then match the connector on the
	harness, if needed.
	
	But the rest of the info is good for if you're trying to hook this up to
	a non-GM engine.

	This brings about a question; Did you get everything from the Olds
	you're going to need, all the sensors, distributor, etc? What are you
	going to do for VSS? Be sure to change out any pieces of rubber fuel
	hose with the higher-pressure stuff so it doesn't blow apart once it
	gets pressurized.

	Good Luck,
	Joel



Andrew Gibson wrote:

> The reason I reccomended what I did is because the 1227748 ecm spark 
> tables and base spark setting are for DIS. It was never used on a 
> distributor so the timing may be way wacked once est is commanded. I 
> am going to check it out but haven't done it yet. As for using a 
> distributor from a TBI it could work well. If it will fit the motor. 
> (There are about 4-5 different designs for the block) and doing so 
> will also require burning a very custom prom. Currently Tunercat is 
> the only one with 1227748 definition files for editing. And then you 
> have to buy proms, burner, etc. to get going.
>  
> And the 250 HEI distributor? I have 2. Both do not have any external 
> connectors and the module location would require major modificaiton to 
> the distributor and cap. Potentially opening up for water intrusion. 
> Again I don't know how the 1227748 ecm will handle the spark tables on 
> a distributor. So I'm leaving the mechanical adavances for now.
>
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