Fuel pump relocation questions, and other problems Options

[championgt1]

I finally got my car what I thought was running right. However after a half hour drive the car started to buck at around 3000 rpm. When I came to a stop the car just died. It would restart, but as soon as I gave it some gas it would just die. Acted like it was starved for fuel.

The TPS has been adjusted per the tech articale on pelican. The plugs look good, pump runs and is getting fuel to the cylinders. I thought it could be the fuel filter. This is where it gets strange. My car is a 74 which should have a small inlet and outlet. The filter is in its stock location but has a small inlet and a large outlet like the filters on a 75, 76.

The filter on the right is the replacement, the filter on the left came out of the car.



The fuel pump was relocated to the front at some point.

Couple of questions.

#1 Does anyone have pictures of a installation and did you leave the filter in the stock location?

#2 Should the filter be between the tank and the pump,not after the pump?

#3 The fuel filter that I removed was bulged outward. What could cause this?

I'm sure I will come up with more questions. Just a little tired right now.

[Joe Owensby]

A somewhat late reply, but there is, or at lease was, a very real vapor lock problem with the original pump. I am posting this mostly for others referencing this in the future.

My brand new '73 914 left me stranded about 5 times during the first month I had it. I had it back to the dealer each time, and the poor mechanic who did the pre-delivery inspection had to try to find out what was wrong. He exchanged every component on the FI system, one at a time, each time thinking the problem was fixed. Replaced fuel filters, hoses, etc. etc. I would take the car back, and then later after it was suppposedly fixed, usually when I would stop at a stoplight or tool booth, the car would just die in the middle of traffic. I was so pissed, as this was my first new car, and it was turning out to be a POS. Fortunately, I later got it fixed.

Turns out the summer of 73 was a pretty hot one in the eastern US. Somewhere around the end of the summer, the factory had a fix for the problem. This was to basically take off the baffle on the passenger side heat exchanger flapper valve and add a small hose to route the air that blows through the heat exchanger away from the pump. The original bafle (which was a kind of open cap) actually directed the hot air onto the pump, causing the problem. If anyone is interested to see if their car had this modification, the driver side flapper valve should still probably have the cap baffle.