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-   -   testing the ALCL. poor cold start running (http://zr1.net/forum/showthread.php?t=22923)

Karl 05-12-2014 04:37 PM

Re: testing the ALCL. poor cold start running
 
Quote:

Originally Posted by Franke (Post 203099)
What XfireZ51 said plus I am surprised that it runs with that low of a fuel pressure. Interesting.:confused:

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....

Karl 05-14-2014 09:43 AM

Re: testing the ALCL. poor cold start running
 
I just finished changing the fuel filter and the car now holds 22psi at idle.

Time to pull the fuel pumps.....

XfireZ51 05-14-2014 10:50 AM

Re: testing the ALCL. poor cold start running
 
Quote:

Originally Posted by Karl (Post 203210)
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". :dancing

Karl 05-17-2014 11:18 AM

Re: testing the ALCL. poor cold start running
 
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?

http://s5.postimg.org/wtgnw0rf7/20140517_095805.jpg


http://s5.postimg.org/d04k3be1f/20140517_095814.jpg

http://s5.postimg.org/dqxa93ger/20140517_095823.jpg

XfireZ51 05-17-2014 07:44 PM

Re: testing the ALCL. poor cold start running
 
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.


Quote:

Originally Posted by Karl (Post 203367)
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?

http://s5.postimg.org/wtgnw0rf7/20140517_095805.jpg


http://s5.postimg.org/d04k3be1f/20140517_095814.jpg

http://s5.postimg.org/dqxa93ger/20140517_095823.jpg


Karl 05-17-2014 09:47 PM

Re: testing the ALCL. poor cold start running
 
Are you referring to the black clamps around the hoses?

XfireZ51 05-17-2014 11:35 PM

Re: testing the ALCL. poor cold start running
 
Quote:

Originally Posted by Karl (Post 203398)
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 05-18-2014 12:00 AM

Re: testing the ALCL. poor cold start running
 
One last question. How tight should the clamps be?

Karl 05-18-2014 12:01 AM

Re: testing the ALCL. poor cold start running
 
The ones I replace them with? Hand tight?

XfireZ51 05-18-2014 12:09 AM

Re: testing the ALCL. poor cold start running
 
Quote:

Originally Posted by Karl (Post 203406)
The ones I replace them with? Hand tight?

Just don't have the rubber squeeze through like dough.


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