NEED HELP: 1974 1.8L Will Only Start with Brake Clean, Runs with AFM disconnected only Options

[Nor.Cal.914]

Hello everyone,

I have a 1974 1.8L that needs a new fuel pump and the customer purchased this pump from Pelican:

https://www.pelicanparts.com/More_Info/0439...59&DID=4630

I have already figured out the line routing in terms of inlet and outlet, but I do have a few questions about some other aspects. Being that the stock pump is a 3-port pump, first question is, what was the reasoning behind the 3 ports instead of just an inlet and outlet? My first thought was maybe an internal FPR, but I see there is a one in the engine compartment so that doesn't seem to be the case, but please correct me if I'm wrong! Second question involves mounting the pump. I have a 1975 so I'm not as familiar with how the 1974's were setup. This car has the coil style ring bracket around the pump which I'm now trying to figure out if I can utilize to mount the new pump. Main issue of course is the fact that all 3 lines came out on one side of the factory pump, whereas this pump has inlet/outlet on either side.

So my question is, what have you guys done to mount your pumps either in the same location or where did you place it instead of the factory location? Thank you in advance for the help! (IMG:style_emoticons/default/beerchug.gif)

-Christopher

[technicalninja]

Hello from Granbury Texas!

I have a shitload of L-jet crap for my 75 including good AFMs, injectors, wiring harness (Jeff Bowlsby!) couple of ECUs that should be good. I have one of Ficara's brand new dual relays.

I have a shitload of L-jet experience, mostly Datsun Z related but it's the same puppy!

I don't really want to sell my stuff until my stock 1.8L has a functional FI back on it.

I am NOT opposed to loaning stuff out (for free!) should you want to try swapping stuff around.

If I can help give me a call!

Rick

https://granburyautoac.com/

[Nor.Cal.914]

Hello from Granbury Texas!

I have a shitload of L-jet crap for my 75 including good AFMs, injectors, wiring harness (Jeff Bowlsby!) couple of ECUs that should be good. I have one of Ficara's brand new dual relays.

I have a shitload of L-jet experience, mostly Datsun Z related but it's the same puppy!

I don't really want to sell my stuff until my stock 1.8L has a functional FI back on it.

I am NOT opposed to loaning stuff out (for free!) should you want to try swapping stuff around.

If I can help give me a call!

Rick

https://granburyautoac.com/

Hello Rick!

That would be great! Would the '75 be the same as the '74? Does it use the 6 pin AFM as well?

I looked into the AFM a little bit more on this one and found when it is plugged in, the flap inside the air box is fluttering around when cranking (which seems to be correct?), and it doesn't move at all when it is disconnected so it seems like it is trying to do its job to get the engine to run. I have to work on some other cars for now so I'll come back to this one in a bit. Thank you again!

-Christopher

Edit: I was able to get it to start, but immediately die, with the AFM connected and only with brake clean sprayed into the intake. Based off what I'm finding and what has been said here, I think I'm going to try and smoke test the intake to see if I can find any gross leaks that may be preventing this thing from starting and then continue from there.