e34 3.5 direct drop in?

[Layne]

There's no reason your green wire can't loop through the glovebox before heading outside to the coil. I'm more concerned about where the power comes from before the fuses. On the original car, there are only two 10awg or so power wires coming inside from the starter to power the entire car through two 1/4" spade terminals. I wouldn't add ANY additional load to that. Run new wires all the way from the starter or battery. Then it's easy to put your fuses outside, provided you use a waterproof box.

 

[sfdon]

I install an engine connector for all the wires at the fender by expansion tank.
I like the ability to disconnect and diagnose at that plug.

Link to ev1 plugs I use ..,

http://m.ebay.com/itm/EV1-FUEL-INJECTOR-CONNECTOR-PIGTAIL-QUICK-RELEASE-/291803921195?nav=SEARCH

 

[sfdon]

I run fresh 10ga from starter to bus by 1.3 relays

 

[Rek]

E34 wiring diagram extract. Fusible link from battery to Motronic. 50Amps, unless my eyesight is going the way of my common sense.

 

[sfdon]

My schematic shows "E" as the source of battery power to the rear defogger.
Fuse 46
Also fuses 30,31,32, 41, 42, 43, 44, 47

Can you post a pic of what your schematic has for "E" please?

 

[Rek]

Goes to power post X1540

See picture attached. Power to main relay, fuel relay and motronic. 50Amp fuse link mid wire.

 

[Rek]

If I am wrong - and I have form on this, then please point out my error.

 

[sfdon]

And the entire auto transmission control ecu and valve body and auto TPS and lights for auto tranny and relay and....
That's 15 amps right?
Thanks !

 

[sfdon]

It does all make sense-
15 amps fuel pumps
15 amps tranny control
15 amps motronic

I use
15 fuse to fuel pump
30 amp fuse to bus for pump and motronic from starter

I add a 15 amp fuse from ignition green to coil

No auto tranny circuit in manual cars.

 

[Layne]

sfdon, The letters are recycled over and over, and only valid within the same diagram. I'm sure you're looking at a different "E".

Rek, I finally had time to review what you're saying, and you are correct... For a 1989 model. But if you'll look at a 1992 model 535i, he 50 amp fusible link has been eliminated. The entire motronic system is completely unfused! No, I can't really explain why, but usually if something is removed from the system, it's because it was causing problems. Also note the 80 amp fusible link that is upstream of all the fuses in the rear power distribution box, that's the one I was familiar with. Actually has nothing to do with the motronic system.

 

[Layne]

P.S., diagrams are here: http://www.wedophones.com/BMWManualsLead.htm

 

[sfdon]

Good catch Layne!

Nice end of story-
My client calls last week- intermittent no run.
It was the 30 amp fuse from starter terminal to Motronic/fuel pump connection
Every part that can go wrong will go wrong

 

[Rek]

Thanks for this.

 

[teahead]

*bump*

I plan on using an L-Jet banana intake on my B35. Should I use the FI wiring harness from the L-Jet or use the B35 FI harness and change the injector connectors?

 

[HB Chris]

Don is the expert but I used a b35 harness, removed unneeded wires, which leaves 7 or so to connect to chassis harness.

 

[teahead]

You guys kept the B35 accessories? Alternator (w/the big hose and all)? PS pump? AC?

 

[HB Chris]

I kept my M30 ancillaries.

 

[teahead]

Umm.. Original e9 engines are m30s. And so are b34, b35s.

You mean you transferred the old acc to the newer engine?

 

[CS Specialist]

Make sure the B35 oil pan clears your cross member. On my recent E12 swap I ended up with the original 1977 oil pan, oil pump, power steering pump and alternator. I still managed to add my piece de resistance which is the E28 hydrodynamic power steering and brakes. No more vacuum booster! No more macaroni manifold intake either.

 

[HB Chris]

Umm.. Original e9 engines are m30s. And so are b34, b35s.

You mean you transferred the old acc to the newer engine?

Correct, I wanted it to look close to period correct. I used a later mount for the compressor though.