What efi system is best for a 4.5 pfi cadillac engine7

[S.O.B.B.]

Dave w I forgot to ask this.is the memcal jumper required. It's done along with the sense resister jumpers but I've since read it's not necessary. Is this true.pcm is 7427 from a 95 c1500 with auto and it will be running a cadillac 4.9 in mpfi mode with 700 r4. Thanks in advance

[dave w]

The Moates.net G1 memcal adapter board is usually required. The Moates.net Burn 2 will not program a factory original 27C512 memcal chip.

I STRONGLY RECOMMEND installing the Sense Resistor Modification! It would be EXTREMELY POOR PLANNING, to skip doing the Sense Resistor Modification. Yes, the MPFI conversion will work work without the Sense Resistor Modification, but PERFORMANCE WILL be affected. Members with extensive electronics backgrounds can clearly understand the advantages of the Sense Resistor Modification.

dave w

[S.O.B.B.]

Thanks Dave w.The sense resister jumpers and memcal mod are the 2 things I did do long ago.it's been sitting in a box waiting for this conversion. But since doing those 2 mods I read the memcal mod was not needed.I also unsoldered the factory chip from the memcal and soldered in a socket and then a zif.I don't have an extensive background in electronics per say unless rc cars qualified.I'd guess not.:rolleye

[S.O.B.B.]

Screenshot_2018-10-07-00-54-31.jpg this mod is the one I was asking about.pin 2 to pin 5 jumper.I was not questioning if the sense resister jumper was needed.just the memcal mod.I've done both.I'm supposed to repin my harness in the morning and still have to do mechanical hook ups to test fire so I guess I'll try it as is with both mods.I had a bit of a steering shaft issue and had to slice a rectangle out of the header and flip it and weld it back in to create a notch for steering shaft clearance.a little less work than moving the colum over.I just hope this all works.

[dave w]

The memcal mod is required so the injectors are triggered once every 4th distributor reference pulse (DRP). Without the memcal mod the injectors are trigger every DRP.

dave w

[S.O.B.B.]

Thank you Dave w. Once I get it fired up I'm sure I'll be asking more questions. The tbi was my first tuning experience over the last almost year logging and making changes. So this is a first time tuning experience for mpfi once it fires up. Thanks again. Much appreciate your time.

[S.O.B.B.]

Harness repin complete. Had left over wires.a couple from last swap.C1 C2 from A.I.R.C9 crank signal.C12 ETM.B9 EVRV. Still have a bunch to do and just waiting on the weather. anyone know what wire I need to run to B10 cruise signal or if I need one for the cc to function?