Tri458

Hi, I am in the process of installing an 86 camaro 305 TPI in my truck and have wired everything using the original engine harness but there is no take off for the fuel pump. Any ideas how I do this please? The fuel relay etc is wired as it should be.

At the moment the fuel pump is wired on the ignition switch but runs constantly.. I want it controlled by the ECU / oil pressure switch if possible.

Any advice would be appreciated.

Thanks.

John in RI

iTrader: (167)

Here's how it should be; This diagram is for an 87 but your 86 should be similar.....




Probably not needed - but related:





If it's missing parts you'll have to customize !

Tri458

Thanks, John. I'll take a look over the weekend. Much appreciated.

Tri458

I've checked the wiring on my harness and there is a tan and white wire that goes from the pump relay, through the oil pressure switch and into the ECU. There is no take off for the fuel pump.
Looking at the diagram supplied by John, would it be okay to splice into this wire? If so, I am guessing between the oils pressure switch and the ECU?

Jonesyfxr

iTrader: (2)

According to my 85 diagram, pin A at the FP relay has a red wire. That wire is spliced into a wire that goes to one side of the Oil pressure switch, then branches off to feed the fuel pump.

Hope this helps

Tri458

Thank you... Weather permitting I will give it a go at the weekend. It's raining and bleak in the UK at the moment and I'm doing this in my drive.... I'll let you know how I get on. Cheers.

John in RI

iTrader: (167)

Jonesyfxr - Are you sure ?? I've seen Orange, Tan/White,.. and blue - but never red.


The 85 TPI Wiring is not the same as later TPI,... I almost posted that diagram here by mistake !

This is the 1985 TPI Schematic ( for those members that read this thread After 01-02-14 ! )




Tri458: The TAN/White wire that should lead to your fuel tank is located on the DASH-to-ENGINE harness connector on a Third gen. ( C207, Pin D ) Since your truck dash harness doesn't that connector you'll have to run a wire from C207 ( Pin 'D" ) of the TPI ENGINE harness back to your Fuel Pump.

Tri458

Thanks, John. Are the pins marked? i have the original ECU under dash connector in a box but it has been cut off at the base of the wires. Appreciate your help. Thank you.

vetteoz

iTrader: (13)

C207 pinouts , for a 87 but should be similar

https://www.thirdgen.org/forums/post...708-post9.html

The pin ID is here but the legend shown does not correspond to that linked above

https://www.thirdgen.org/forums/atta...207-87c207.gif