New option for fuel pump replacement

[tomtom72]

Scott, as I change out my fuel filter every two years and I bleed off the line pressure using my gauge for that. So my gauge is attached so it's easy to test after I change the filter. I know what I'm doing is not by the book to test fuel pump psi. I go to KOEO and look at the gauge, 54 PSI is what I got this past April. I go look under to eye up the filter connections for leaks. Then I start it and she is stone cold at this point so I have time to go look again at cold idle PSI, 54 PSI this year. I go under, again, to make sure I have no leaks and as she is up on stands I don't run at more than idle speed.

I know it's not the correct way to test the pumps, but both should be running if the temp gauge is pined left. I figure if it ever gets to 50 psi then I will do a proper psi test as per the FSM. So far, knocking on wood, the Bosch pumps have done right by me.


Tom

[scottfab]

Originally Posted by tomtom72

Scott, as I change out my fuel filter every two years and I bleed off the line pressure using my gauge for that. So my gauge is attached so it's easy to test after I change the filter. I know what I'm doing is not by the book to test fuel pump psi. I go to KOEO and look at the gauge, 54 PSI is what I got this past April.

Excellent. Thank you very much. Longevity is a key issue on these pumps and keeping each other informed on reliability is the key to that. 54psi is a real good number especially after that much time.

[tomtom72]

You're welcome Scott! Oh, just to be accurate about 'time in service' for the Bosch pumps on my car, it is since this thread was started in 09. I saw what Andrew wrote concerning the pumps that came with the replacement pump/sender assembly and just ordered up the Bosch pumps before I did the transplant. So I have 4 yrs and about 23k miles of usage on the Bosch pumps.


Tom

[Paul Workman]

Pardon me for "axing" a dumb question, but is that 54# reading with or without the engine running??? If you jump the pumps with the engine not running, that would be one thing. But, with the engine running, the fuel pressure regulator should be clamping it at around 50-52, no? 54 seems on the high side, to me.

P.

[tomtom72]

Sorry, that 54 psi is a KOEO reading.

Yes, with the motor running the psi goes down to a reading of 50 psi at idle speed. I just figured that if I see 54 psi doing the KOEO test & a 50 psi at idle speed that she's good to go?


Tom