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]

looking close at one of your photos.
something seems funny.
one of the connections to the double relay is off?




here is a great little article on the double relay on R Atwell's bus website.

https://www.ratwell.com/technical/DoubleRelay.html

i'm not an electrical type of guy. (IMG:style_emoticons/default/biggrin.gif) (IMG:style_emoticons/default/biggrin.gif)
usually rely on my mechanic mike to guide me through,
or often lead the way. but.
i do know this little item does a few things.
like manages the whole flip over during cranking running the fuel pump and switching to the AFM controlling it, and also i believe it sends a signal to the ECU that plays a part in firing the injectors.

greater electrical geniuses than i would know the full explanation.

but my eye tells me that wire not being connected to the double relay ain't right.
and i dunno maybe thats the problem here.
its not firing its injectors when the AFM is plugged in. not getting the signal it should be getting.

could explain why for some bizarre reason its running with the AFM plug out in a paralyized way when it should not. but don't ask me why. all i know is it should not run.