| Author |
Message |
bobm (68.35.160.48)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, April 26, 2004 - 9:48 pm: | |
4104 with a problem dying out and lack of power.Iinspected all the fuel lines and replaced two. I have primed the system and it started. while running I removed the small square plug on top of the secondary filter until I got a good flow of fuel, however, I cant get that flow to be completely free of air.small bubbles persist,if i just loosen the square plug and raise the RPM tiny bubbles foam up the fuel around the plug. Should that fuel be 100% free of air? |
Geoff (Geoff) (66.238.120.101)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, April 26, 2004 - 10:34 pm: | |
You are supposed to check for air in the fuel lines/system by putting the return line from the cylinder head into a bucket and then checking for bubbles. I am surprised you didn't get a shower when you pulled the plug off the secondary filter-- it is on the pressure side of the fuel pump.
--Geoff
'82 RTS CA |
Tom Caffrey (Pvcces) (65.74.65.65)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, April 26, 2004 - 11:56 pm: | |
Start with new filters. If you still do not have considerable pressure and bubble free fuel, you're looking at a bad fuel pump or a leak in the suction line coming from the fuel tank.
With those in good order you should see something over 25 psi at the secondary filter most of the time. And no bubbles.
Good luck running down the problems.
Tom Caffrey PD4106-2576
Suncatcher |
Jose (63.186.9.102)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, April 27, 2004 - 10:47 pm: | |
Geoff;
If I may add;
While doing this You may as well:
Check the pump flow on a 6-71 you should get approxmiately 0.8 gallons per minute (with a fuel line restriction fitting haveing a .080" spill orifice )at 1200 RPM.
Put the end of the hose into the bucket of fuel then watch for air bubbles in the fuel.
This excess flow of fuel is necesairy to cool the injecters.
Jose
Just a dumb,retired mechanic |