FLEX FUEL SENSOR PLUMBING

turbodaniel

clean air 1
Joined
Nov 14, 2007
I have a GM sensor off a 2003 Tahoe and have read that some installs Y off on the return line. Is this necessary or can it just be spliced in? I am running a magnafuel 625 pump with an lines
 
I had assumed it would just go in-line, but the potential for a return restriction is there. Guess it will depend upon how much maximum return flow you have
 
I have a GM sensor off a 2003 Tahoe and have read that some installs Y off on the return line. Is this necessary or can it just be spliced in? I am running a magnafuel 625 pump with an lines

I would y your return. Remember that the factory pump and pressure are lot less than what you will be having. All that I have seen installed have been Yed, including mine. You dont need a lot of fuel to flow through them to read.
 
I would y your return. Remember that the factory pump and pressure are lot less than what you will be having. All that I have seen installed have been Yed, including mine. You dont need a lot of fuel to flow through them to read.
Thanks figured that would be the way to go
I would y your return. Remember that the factory pump and pressure are lot less than what you will be having. All that I have seen installed have been Yed, including mine. You dont need a lot of fuel to flow through them to read.[/QUOTE
 
When you say 2003 tahoe, I assume you have this one.
M-ACDelco-FlexFuel-Sensor-V2-1.JPG


I have this one and I'm going to try to run straight through it even with a weldon 2035 pump. It's roughly .320 ID (same as -8 hose). There is one little ring in the middle where it samples, but it does not look like much of a restriction to me. The weldon can supposedly use a -6 return, so I should be fine. I hope to fire the car back up tomorrow and will know if it causes issues like that or not.
Flex_Fuel_Sensor_E85_in_stock_at_Dynosty.png
 
Where are these mounted on the trucks? Thought they were on the firewall but didn't see them.
 
Thats the one I have.... look forward to to hearing the results

Posted from the TurboBuick.Com mobile app
 
No, I've had a cold and didn't get as much done this weekend as I wanted.
 
No, still nothing. I've gone off on another tangent and am changing a few things to make it more of a "street" car. It might not run for a while.

I have GM# 13577394
 
Done mine last week. Thanks for help mike.

Posted from the TurboBuick.Com mobile app
 

Attachments

  • 1403194062347.jpg
    1403194062347.jpg
    89.9 KB · Views: 544
  • 1403194086277.jpg
    1403194086277.jpg
    91.6 KB · Views: 489
the sensors do not need to be "Y'ed" there are designed to be run in the feed line of a production can and offer no restriction. In the return they will be fine
 
Wish i saw this before dumping big bucks on all the y fittings...any way a couple pics of install

Posted from the TurboBuick.Com mobile app
 
With the new style flex sensor the inlet and outlet are larger then the old one like you have turbodaniel. I had to y my setup as well but with the new sensor you don't have to. The old sensor gets very small thus needed to y it

Posted from the TurboBuick.Com mobile app
 
Nice install guys! You cannot be too careful on fuel systems. Using "Y" seems prudent with the level of investment many of you have made in your TB!
Conrad
 
Top