i had a digital fuel pressure gauge hooked up in my car

within two weeks it just scrolls low

the company sent me a new sender i havent installed it yet

i have a high idle and one day got a code 44, it went away

still high idle

dont give all the iac tps suggestions

im just trying to rule out my fuel pump

iac is new

tps is .54v

rebuilt maf

fresh ford 19lb injectors

car has always idled high just now its worse and im still in the troubleshooting process

ill be able to datalog soon


im just trying to get smarter and feed my curiosity for the time being


the fuel sender will scroll low if the pressure is below certain psi

either the sender went bad withing two weeks or maybe just mayeb the fuel pump is going or my year old fuel filter is going bad or clogged


so to feed my curiosity does anyone know how low the fuel pressure can be and the engine will still run even if not too great?

im sure if it was so low id be getting a lean code all the time just curious guys

thanks

 

well with my dieing fuel pump my car idled with 25psi ish... it didnt run well but it would run.

 

turned out to be a bad sender, but thanks for the info. nice to know the limits of your own engine

 

Remember that to lean conditions like to low fuelpressure and so will melt the pistons, to much air and not enough fuel will be hot... just a reminder..

The Ford injectors, are they densos you have ? check on the side, If they are densos, dont go much over 39psi because they dont like it..