Quote:
Originally Posted by aoncurly
Thanks Tony. So if I understand this correctly, since my mechanic did the "traditional" test and was ok, this rules out the WUR and the FD.
So, if I replace the FP check valve first and check the car and if the problem persists, I then replace the FA. The check valve is cheap, but the FA is expensive, so I'd rather start there.
BTW, my mechanic is familiar with older Porsches and is used and recommended by many Pelicans.
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Aoncurly,
No. What the traditional or conventional test tells you is that the residual pressure is good or bad. If the residual pressure is good that's great. But what happens if the residual pressure is bad? There are several most likely culprits aside from a leaking fuel line or fitting and they are fuel accumulator, FP check valve, and fuel distributor.
Each of these most likely culprits could be individually bench tested unless you want to replace parts after parts till you correct the problem. Someone claims it is always the fuel accumulator as the sole culprit for residual pressure problem, that is not TRUE. There are two other culprits to consider. So after replacing the FA and the problem still exists, what would you do next? Replace the FP or check valve? Or the FD?
It easy and convenient just to replace these parts if you don't mind spending your hard earned money. But in most cases, car owners want to spend wisely and just replace defective or bad parts only.
Tony