testing the ALCL. poor cold start running

[Karl]

Originally Posted by Franke

What XfireZ51 said plus I am surprised that it runs with that low of a fuel pressure. Interesting.

What's really interesting is when I modified my old 85 with a new engine and such, first thing to go was the fuel pump.

Guess it's coincidence....

[Schrade]

Cool.

All I noticed was 23# holding pressure @ idle (static FP test is primed FP only, motor off).

[Karl]

I just finished changing the fuel filter and the car now holds 22psi at idle.

Time to pull the fuel pumps.....

[XfireZ51]

Originally Posted by Karl

I just finished changing the fuel filter and the car now holds 22psi at idle.

Time to pull the fuel pumps.....

Karl,

Check to see if you have the plastic clamps on the pumps. If so, I would replace w metal hose clamps and see what happens then before replacing pumps. Altho there's always the "while you're there" rule and the corollary which is "may as well".

[Franke]

Originally Posted by Karl

I just finished changing the fuel filter and the car now holds 22psi at idle.

Time to pull the fuel pumps.....

Karl, do you have another fuel pump tester? Just to verify the first one is reading correctly before you replace the pumps. 22 PSI is really low.

[Karl]

Fuel pump assembly has been removed. All looks good. Before I replace the fuel pumps with ones from a suburban 454, is there a test I can do to confirm they are bad?

[XfireZ51]

Karl,

I would replace those black plastic clamps first then put pumps back in the tank. See what ur FP is. Its easy enough to pull the pumps again if u need to replace them.

Originally Posted by Karl

Fuel pump assembly has been removed. All looks good. Before I replace the fuel pumps with ones grok a suburban 454, is there a test I can do to confirm they are bad?

[Karl]

Are you referring to the black clamps around the hoses?

[XfireZ51]

Originally Posted by Karl

Are you referring to the black clamps around the hoses?

Yep, replace them w hose clamps. They get loose and fuel will squirt out lowering the FP.

[Karl]

One last question. How tight should the clamps be?