Fd3BOOST

My fuel pump died today. Not sure why.

It worked then it didnt.

I checked the fuse block on the firwall/fender. And the one behind the seat.

So I pre-emptively went ahead and bought a new fuel pump and fuel filter yada yad to swap it out tomorrow.

But is there somewhere else i should check first?

I will hook up a test lamp to the fuel pump anyway.



It only bugs me because I only need the truck to run for two more weeks so i can drive it where i will be disassembling it.



Still after dropping only $65 for the parts it beats the **** out of Fd part prices.

Fd3BOOST

Well It seems that my problem was the hotwire to the fuel pump is no longer hot

I couldnt say why. I f I had a voltage meter the other day I would have known that then.

In anycase, too late I had already bought the new pump and fuel filter. So went ahead and swapped thm out and put in new lines aswell.

I had to rewire the new pump to the battery with a cut off switch.

Truck starts and runs now. Still dosen't idle unitl the engine warms though.



POS 12A is all i can say about that for now.



I cant wait to get all that crap ripped out of there for some updated ****..

Jeff20B

I have a weak fuel pump on my red truck. It's going to get replaced with a big Carter. My white truck already has a Carter, so I decided to get one for my red truck.



I have no idea what you should check since I've not done my swap yet. I might hook up a relay because my 'hot' wire is thin. It looks like the PO did it because it's not a stock-looking wire.

Fd3BOOST

So you have an external pump as well?

I am curious, when I asked for the part at PEP boys I toldthem 74>mazda>rotary truck. He brought out a large intank pump.

Then I figured that mine was converted to external when then swapped in the 12a engine into mine.

Obvioulsy then I just told him to bring me an electric pump for a 70's truck.



So which was stock? Internal or external?



In anycase it is a temporary solution for me. I will be using a Walbrow when I get her all set up properly.

Jeff20B

I've seen several trucks in my day, and they've all had external pumps. As far as I know, internal pumps are GSL-SE and later with FI.

Racer X

First gens all have external pumps.The FC's and newer 7's came with in-tank pump setups.

Fd3BOOST

I wonder what the kid at the parts counter was trying to pass off on me.

j9fd3s

you might try adjusting the idle mixture on the motor, if your standing on the drivers side looking at the carb its a phillips screw with a spring on it. if theres 2 screws (79 and older carbs) than i think the big one is the air bleed. turn screw until it idles at the higest rpm. if you have the 2 srewed carb, your not screwed (sorry i'm laughing), turn one screw until you get higest idle speed then turn the other until you get higest idle speed, then repeat. it should idle on its own faster than 20minutes (30seconds in the summer, 2-3 miuntes in the winter)

Fd3BOOST

Thanks for the tip Mike. I will give that a try.