[IT Manta]

I am installing '75 efi into a '72 Manta. i am finding that my Opel memory has many holes. Two questions. It seems that the cover for the thermostat housing is different on the '75 if this is the case does anyone have one for sale? Also, the EFI harness I have only has one connector for the dual relay. Where does the other connector come from? Is it part of the main harness? I do not remember what I did when I converted my '74 to EFI back in the 80's. I can wire it in via the wiring diagram if I have the connector. Any help would be appreciated.

 

[IT Manta]

Ok, with a little help from soybeans L-jet infolmation in the gallery it looks like I am missing a small harness that goes between the dual relay/control unit/starter/and coil. Does anyone have one of these harnesses stashed away? I could make one up however I would prefer an OE harness.

So I would like to purchase a spare '75 auxilliary harness and a top for a '75 thermostat housing (where the upper radiator hose goes).

 

[IT Manta]

Aarg! Thread jacked! Back to our regularly scheduled program.

 

[IT Manta]

Thank you Keith, I have an e-mail into him. I hope this pans out because I am running out of options.

 

[IT Manta]

Thanks Rick. That is the harness I already have. If you look closely that harness only connects to one half of the dual relay (the rusty one). The other half comes either from a small auxilliary harness or is part of a 75 only engine/chassis harness. I do not have a vehicle to compare with. Either way I have pretty much decided to eliminate the relay all together and power the fuel system and pump via a seperate switched circuit. This is for my race car and I already have the circuit in place from the Carter electric fuel pump I was using before

 

[IT Manta]

One last request before I pull my hair out. I am trying to wire the side of the dual relay that goes to the fuel bump, ignition switch, starter, coil,ground, and the battery. The problem I am having is identifying which terminals on the relay goes to what components. I have a Bosch book that gives relay number coding, but I have not been able to make the relay work properly. Could someone with a '75 tell me what color wires go to each numbered connection on the dual relay?

 

[IT Manta]

help please, 75EFI

bump to the top

 

[IT Manta]

Thank you very much Stephan. That is exactly what I needed.

Thank you also Jarrell. I do have the wiring diagram, but they do not show what nuber wire goes where or what wire goes to what terminal on the relay. Also I had no pinout for the ECU that showed what each pin at the ECU does. I was just one step short on information either way I wanted to figure it out.

I overlooked one page of the supplement that had the wiring diagram. Figures, the page I needed.

Thanks again for the help, she should be runining tomarrow

 

[IT Manta]

I just wanted to thank everyone for thier help again. After finding my spare dual relay The Manta fired right up. New 1.9l EFI ITB engine ready for break in and dyno tuning. I also recieved my '75 supplement today, so I am all set . The car is just a paint job away from track ready again. All new suspension, rebuilt trans, brakes... I will post pictures after the pain t is done. The livery will be silver '75 GTE.