You can check pressure at the rail, or you can check the flow. To check the flow you need a 5 gal bucket and a stop watch. Disconnect the fuel output line from the pump and hook a piece of hose to it. Hang the hose in the bucket. Fill the tank with some gas. Hook power to the fuel pump and time how long it takes to fill the bucket. 5 gal/(bucket fill time) = gpm or gps.

 

Fuel ok but engine just cranks... maybe a little ignition, but still not running. Do you think that there is still bad gas running thru the lines?

 

Could be bad gas in the lines, ignition problem, clogged injectors, or any number of things. I usually use a timing gun to see if each plug is firing.

 

How do you use a timing light?

 

Just put it on the plug wire. When the plug fires the light will flash.

 

i just finished my rebuild. i would check your ground on your intake manifold to check that it is grounding right. if not you will have an incomplete circuit to the injectors and it wont spray fuel.

also check your EFI fuse on the main block its the third one up on the left side it should be a 15 amp.

on our motors the pump only runs when the engine is cranking. were the fuel lines exposed during the sit time? if so u could have a clogged injector.

last if your battery isnt charged with enough volts it wont run the EFI when starting. it will crank but wont always run the EFI.

i might also check your mass air flow sensor because if its all clogged up with crap the truck might not run let alone start.

lastly i would pull a spark plug and keep it attached to the wire and ground it to something metal w/o paint and crank the engine quick and have some one tell you if it has spark

good luck!

 

I got it running, thanks for the HELP!!!

 

( lastly i would pull a spark plug and keep it attached to the wire and ground it to something metal w/o paint and crank the engine quick and have some one tell you if it has spark )
My truck 2.7 died on me today. got it home and tried this and had no spark. What now?