1986 325e to I

[robert1700]

So I swapped a M20 B25 into this pos 1986 325e and I cant get fuel to the motor? Is there a wire I am missing to get the fuel pumps to turn on. The motor is out of a 1988 325i vert, motor ran perfect before.

Currently the car cranks but no gas is coming out.

Did the c104 to c101 and ignition coil wiring

[Gary Horneck]

A '86 325e has two pumps. One in tank, and one inline. They work together. Upgrade the in-tank pump to a TRE pump, do away with the inline. That's what I did.

[kid325e]

Fuel Supply and Return hoses mixed up? Easy to mix them up. FPR good?

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[kid325e]

Did you upgrade the engine management to Motronic 1.3 with the crank sensor off the front of the engine?

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[robert1700]

Yep everything was swapped from the vert. I have no power at either fuel pump therefore no fuel coming to the motor.

Has to be a wire somewhere

[e30austin]

What did you do for C104 wiring in the glovebox?

[gasgasrider]

c104 plug from 1986 325e body harness has three wires:
1- black wire-engine speed
2-green wire-OBC fuel cut function
3-yellow/white wire-fuel rate
On the 89 I harness, splice or connect the following wires to the ones on the c104
Pin 3 from c104 to pin 8 on the c101 of the 89(yellow/white or white/white wire)
Pin 2 from c104, run a wire directly to the + terminal on the coil (green wire)
Pin 1 from c104 to pin 9 on the c101(black wire)

[robert1700]

Copy and pasted from e30 tech

[robert1700]

...

[gasgasrider]

Yes it is that's the info I used and it started right up.