Where on a GM truck do the flex fuel sensors mount? Are they exposed to the 60psi of the rail?

Thanks!

 

it should be down by the frame rail... drivers side frame rail if im not mistaking... i will confirm at work tomorrow just follow the fuel lines.. its called teh fuel composition sensor... i believe its on teh frame rail area around about by the firewall

 

I don't need persay to find it on a gm truck, we have one and are using megasquirt to create a flex fuel 4 stroke snowmobile. We were going to mount the sensor between the fuel pump and the rail which will be about 60psi. I assumed that since GM uses 60psi at their rail that we'd be set, but I was making sure....

ps thanks for the quick response!

 

oh.... oops sorry about that... yes it does see the full rail fuel pressure

 

thanks!

 

Flex fuel(E85) factory pressure is 48~54 psi.. Regular gas engines are 55~62 psi. According to my factory manual.

 

hm... ok lets hope 60 psi doesn't hurt it then I guess I could back it down if I had to Stock rail pressure for the sled is 42psi but we were upping it to 60 in an attempt to make the currect injectors flow enough for e85