Dual fuel tank question
#16
05-09-2012, 03:49 PM
Join Date: Apr 2012
Location: Orange County, CA
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When you jumper the EEC it runs all 3 fuel pumps at the same time. There is a low psi pump in each tank and a hi psi pump on the left side frame member. Between the tank pumps and the hi psi pump is a tank selection valve. That selector valve works off of pressure from the low psi pumps in the tanks. In other words when you flip the switch on the dash the tank/pump you select switches the vale over. (Eg: Turning on the back tank cuts power to the front pump and fires up the back pump. The psi from that pump is what actually causes the selector valve to switch). Which ever pump is on will cause the valve to switch to it. It is all done by fuel psi alone, there is no electrical connection at all to this valve. Therefore I am not sure jumping the EEC will work because the selector valve will be receiving psi from both tank pumps.
#17
05-09-2012, 04:18 PM
Believe me, I did not get it all at once either. I have a Clymers manual I bought at Autozone. It took me awhile with that book, this forum and internet research. I have already cleared my history so I no longer remember where I looked on the internet. I'm sure I started with Google though. I have some experience because I've always had to work on my own vehicles. So, don't sweat it. It will come to you.
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MdCowboy44
1987 - 1996 F150 & Larger F-Series Trucks
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09-22-2011 11:15 AM
