No fuel

[offshore]

I can not get any fuel from the mech fuel pump to the carb. I check the fuel line to the tank and it is clear and good. I pulled the fuel pump off and manually pumped it while it was connected to the fuel line and it worked fine. I put everything back together and I still cannot get any fuel to the filter or carb. Any ideas?

Kafer

[manoa matt]

The actuating arm on the fuel pump MUST be on top of the auxillary shaft in order for the pump to pump. As you install the pump tilt it back so the actuating arm is pointed up slightly. Push the pump and arm into the engine block and as you tilt it toward the block and line up the holes you will feel some resistance as the arm contacts the auxillary shaft.

Is this an existing pump and the problem just started, or did you install a new pump and it will not work?

Are the rubber supply lines to and from the pump new? Check the entire length of fuel supply line. There are several rubber lines that connect sections of hard lines. If these are old and cracked you could be sucking air.

[offshore]

It is a new pump. I disconnected the pump from the block and left the fuel line connected from the fuel tank and it pumped fuel just fine. I took the pump back off this afternoon and refitted it. I turned the engine over and the fuel pump worked for just a few seconds and then stopped pumping fuel in to the fuel filter. It is almost like the actuating arm slipped out of place. Could it be possible I was given the wrong fuel pump and the actuating arm is just too long.

Kafer

[manoa matt]

I'd compare the actuating arms of the new and old pump. Also the angle that the arms as they exit the pump. Some vendors list different mechanical pumps for the various engine sizes, while I've seen one vendor list a mechanical pump that was for 1968-1980 cars.

The position of the auxillary shaft does not matter when installing a mechanical fuel pump. The position of the shaft is only important when fitting a timing belt.

"NOS" or New Old Stock pumps are prone to failure shortly after installation. The diaphram dry rots from sitting on the shelf so long. Soon after install the diaphram breaks.

The original mechanical pumps were Savara brand and were steel crimped together not allowing diaphram replacement. Most of the pumps being sold today are aluminum bodied and capable of dissasembily to replace the diaphram. However the diaphrams themselves are pretty hard to come by.

If both of your pumps (new and old) are the same design and can be dissassembled you could try and switch the pump diaphram, or at least open them up to see whats going on.

[offshore]

I do not have the old fuel pump the owner before me put the new one on. However, I was comparing fuel pumps on line and it appears that the fuel pump on the car now is for a fiat spider 124/ 2000. Which, in the pictures the actuating arm looks longer than the picture of the fuel pump for the fiat I have a 1971 fiat spider 124. Could that be the problem?

Kafer

[manoa matt]

Does your 71 have a 1438cc or a 1608cc motor?

IAP lists a pump for the 1608cc but not for the 1438cc Vick Auto lists a pump for 68-74 cars.

Aside from the block getting taller as the displacement increased, I can't confirm any other dimensions with regards to the location of the aux shaft or pump actuating arms. I would assume that later pumps had slightly greater capacity or fuel diplacement to compensate for the larger engines.

If the PO replaced the pump, did the car run and work when you got it? If it worked then it worked, and the problem may lay elseware. If it never worked or always had problems since the PO replaced the pump then I'd consider getting the correct pump for your engine.

[So Cal Mark]

1.8 and 2.0 pumps are different and not interchangeable. You have the wrong pump

[mdrburchette]

I just replaced the pump on my 1608 from IAP and it fit right in and worked like a charm. It's listed for 68-73 models on the box and in the Fiat parts book. part # from IAP is 17025000. Just make sure you buy extra fuel pump filters since you'll have to replace the one between the pump spacer and the engine block.

[htchevyii]

I just replaced the pump on my 1608 from IAP and it fit right in and worked like a charm. It's listed for 68-73 models on the box and in the Fiat parts book. part # from IAP is 17025000. Just make sure you buy extra fuel pump filters since you'll have to replace the one between the pump spacer and the engine block.

That seems like a funny place for a filter, I think you've been spending too much time standing on your head you meant gasket, right?

[offshore]

Thanks for the help. I have ordered a new fuel pump.

[offshore]

I put on the new and correct fuel pump and I have fuel to the fuel filter. I primed the fuel filter and I have fuel going to the carb. However, I do not see any fuel going into the carb. If I dibble a little a bit of fuel in the carb the car almost starts. The owner passed away right after putting the new carb on, so I am not sure everthing is connected right or adjusted correctly. Could someone look at the pictures and tell me if they see anything wrong or have any ideas? Thanks.

Kafer

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[So Cal Mark]

fuel hose is connected properly. Choke should be closed with a cold engine. There is a large vacuum port that you have a hose connected to, and the hose seems to go to the right side of the engine compartment. What is that hooked to? That's a fairly large vacuum leak if the hose isn't connected to the right spot

[offshore]

The big hose connects to the air intake and there is a smaller hose that runs from the bottom of the carb-plate to the air intake also.

Kafer

[So Cal Mark]

the hose I'm concerned with is the vacuum hose from the intake manifold that points toward the fuel filter. What does the other end attach to?

[offshore]

The vacuum hose from the intake manifold runs up and under to the housing that the master cylinder is connected to.

Kafer