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

[wonkipop]

and yes you will have a bit of trouble mounting a modern turbine pump in the stock location under the right hand side of the engine bay in a 74. most of the pumps are a bit too long in length.

the issue will be the loop the supply fuel line has to make to get into the top of the pump.
if you can even get a satisfactory slow curve. which i doubt. and if you did it would likely give you trouble with collapsing. producing symptoms like the dread vapor lock problem of legend. but slightly different of course.

i had a turbine 2 port pump mounted in mine while i was rebuilding. i mounted it on the rear wall of the engine side of the passenger compartment. fire wall. this i believe was an earlier location for 3 port pumps in the first few model years. that let me get the lines in and out without any tight curves. later when i reinstalled my rebuilt 3 port i could put it all back in using the original mounting location.

can i suggest if you use a modern rotary fuel pump that you include a high pressure fuel filter in the line after the pump. you can usually mount in the engine bay in line before it gets to the injectors. the original roller cell pumps are real tough dependable units and unlikely to blow themselves apart internally. but modern fuel pumps are another matter.
the last thing you want is pump implosion debris getting to the fuel injectors these days, given they are getting a bit hard to get hold of in some cases.