HalfInchWrench

I just bought an old ATC 4000E that came with a grey TPI cable. My car is an 87 305 TPI.

From a search I found that sometimes the TPI cable is needed, more times the regular GM OBD I cable is needed.

I am getting eratic readings with the tool. Idle RPM at 6260, voltage at 25, injector pulse width 0 ect.

I suspect I need the regular cable.

Does any body know the pinouts for both cables or if you have the regular cable, list what the pinouts are for both ends?

I think I could cut and splice it to make it work.

The old cable does not appear to be for sale anymore.

Noha

The Gey one is the one you need for TPI .

as for the black cable thats is for Carb,TBI you can use this too but without high speed data.

Sounds like 4000e need's to be Repaired
I have both the 2000 & 4000 and they will do this.

is your Primary coolant fan coming on at wrong temp too.?
(thats is if you have)

JP84Z430HP

I *think* the TPI cable is only needed for the 165 ECM's in TPI applications, not sure about 730 TPI. I can take a look tomorrow at work, as we have a 4000e and a genisys. Pretty much any other 82-95ish application uses the black, standard adapter, even for high speed ALDL. Example, every application that has a 730 that I've scanned (haven't scanned a 730 TPI lately) uses the black cable, along with the 4 cyl TBI 165. I have to use the scan tool on for sure tomorrow anyway, so I'll plug a couple applications into it to see.