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03-01-2011, 10:23 PM
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#1 |
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Addicted to Rust
 
Join Date: Dec 2009
Location: Abbeville SC
Posts: 1,030
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Interesting Problem
I am having an issue with the switching valve on my truck. (87 GMC) It was originally a TBI truck with the motor driven valve. I have installed a 5.3 ls, and now it is pumping out of the right tank and returning to the left. The meter is also not changing. The pumps switch from side to side. Either the valve is stuck, will not handle the 60 psi or I have flubbed up the wiring some how. It was working fine when parked in July(famous last words). Further investigation with a diagram in the near future. Jay
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Current trucks: (48 GMC100 320 inliner) Gone (48 Suburban in pieces) Sold 87 GMC CCSB 5.3 4l60E Daily Driver ECTA National record holder XO/PP We never really grow up, we just learn how to act in public. |
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03-01-2011, 10:58 PM
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#2 |
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Robert Olson Transport
 
Join Date: Oct 2002
Location: recent transplant to NC USA
Posts: 20,310
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Re: Interesting Problem
i had an old f 150 that did that and it was the crossover valve
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Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!! |
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03-02-2011, 01:11 AM
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#3 |
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the pollock
Join Date: May 2008
Location: abilene, texas
Posts: 4,423
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Re: Interesting Problem
soulds like your valve had gone to crap.
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Jack of ALL trades, Master of none.. (but one... procrastination) Army vet 02-08 RIP El Jay! Miss you brother! http://67-72chevytrucks.com/vboard/s...d.php?t=343538 http://67-72chevytrucks.com/vboard/s...d.php?t=386042 |
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03-02-2011, 10:53 AM
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#4 |
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Slots go on anything!
Join Date: May 2003
Location: Richardson, TX
Posts: 5,957
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Re: Interesting Problem
I think Bob (Glock) had found a higher pressure switching valve when he did his LS swap. It's towards the front of his build thread.
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1974 Jimmy- 5.3/4L80e/NP241 |
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