Fuel pump options for 73 injected model Options

[maddhatter]

I recently picked up a 73 1.7 that had been stored inside for 20 years. The body is great as expected sitting inside, but the fuel pump does not work among other things and looking for a replacement I see that they are no longer made. Great! Can I retrofit a later model pump to fit my car? I thought the injection systems were pretty much the same all the way through the years, but the newer pumps look vastly different from my hunk of metal pump, mine having 3 hose connections and the newer ones only the typical two. Thanks in advance.

[Cap'n Krusty]

Some folks might tell you to move the pump, but I won't be one of them. Too much plumbing and adapting, and (unless you pop for SS pipes) you'll be pressurizing lines that were designed to run at no pressure at all. Keeping the pump in the back means you'll need maybe a foot or 18" of 12mm hose, the adapter hose, the pump, and new rubber fuel lines from the pump area to the engine area.

IME, the stuff you read about vapor lock is hearsay and mostly unsupported by evidence. I live where it gets hot, and I used to live in La La Land, where it's hot AND there's a lot of slow traffic, and I've never seen a single case of it.

Drain the tank, remove the filler neck and take a good look at the inside of the tank. If there's rust and/or crap in there, pull the tank, replace the hoses under there (some 7mm, some 9mm), and have the tank cleaned and coated. Be REALLY careful not to crimp the hoses when you reinstall everything. Get a new filter sock for the inside of the tank, too. Save the paper washers for the bottom fittings, they're hard to come by.

The Cap'n

[914_teener]

Some folks might tell you to move the pump, but I won't be one of them. Too much pluming and adapting, and (unless you pop for SS pipes) you'll be pressurizing lines that were designed to run at no pressure at all. Keeping the pump in the back means you'll need maybe a foot or 18" of 12mm hose, the adapter hose, the pump, and new rubber fuel lines from the pump area to the engine area.

IME, the stuff you read about vapor lock is hearsay and mostly unsupported by evidence. I live where it gets hot, and I used to live in La La Land, where it's hot AND there's a lot of slow traffic, and I've never seen a single case of it.

Drain the tank, remove the filler neck and take a good look at the inside of the tank. If there's rust and/or crap in there, pull the tank, replace the hoses under there (some 7mm, some 9mm), and have the tank cleaned and coated. Be REALLY careful not to crimp the hoses when you reinstall everything. Get a new filter sock for the inside of the tank, too. Save the paper washers for the bottom fittings, they're hard to come by.

The Cap'n

I am with the Cap'n on this one. I live in LA LA since I've had my teener. I retrofitted the three port pump to the two port pump ...bus part No. I believe, and installed it in the stock location. I have never had a problem with vapor lock or any other heat related problem.

I agree with not pressurizing the inlet line as they were not designed for it in your year. I have a '73 as well.

Issues will be:
The stock mounting clamp won't tighten on the smaller pump.

Other than that I would do what everyone has suggested and I really don't think it is necessary to move the pump up front. Save your energy for other things.....and there will be.

Good idea to dump the old fuel and inspect every fuel line while you are there. I ended up replacing ALL my rubber fuel lines, I have D-jet injected car. I used the CARB rated lines for the reformulated fuels now on the market. The jury is out on wether these are better or not....I am not a purist by any means but these connections are CRITCICAL to keep your car from going up in smoke.

This board is great....lots of characters and helpful folks..

(IMG:style_emoticons/default/welcome.png)

[SteveL]

[/quote]

I am with the Cap'n on this one. I live in LA LA since I've had my teener. I retrofitted the three port pump to the two port pump ...bus part No. I believe, and installed it in the stock location. I have never had a problem with vapor lock or any other heat related problem.

I agree with not pressurizing the inlet line as they were not designed for it in your year. I have a '73 as well.

Issues will be:
The stock mounting clamp won't tighten on the smaller pump.

Other than that I would do what everyone has suggested and I really don't think it is necessary to move the pump up front. Save your energy for other things.....and there will be.

Good idea to dump the old fuel and inspect every fuel line while you are there. I ended up replacing ALL my rubber fuel lines, I have D-jet injected car. I used the CARB rated lines for the reformulated fuels now on the market. The jury is out on wether these are better or not....I am not a purist by any means but these connections are CRITCICAL to keep your car from going up in smoke.

This board is great....lots of characters and helpful folks..

(IMG:style_emoticons/default/welcome.png)
[/quote]



I realize this is from a post about 3 years ago, but you said that you put a new 2 port fuel pump in the stock location. I am trying to do the exact same thing.
I used the clamp bracket from the 3 port with a wrap of cork gasket material around the new pump to make it tight. I put the bracket as close to the inlet end of the pump as possible. When I try to put the pump up on the studs, the 12mm inlet fuel line kinks because that end of the pump is too close to the firewall.
How did you get around this?