Rob Virgo

iTrader: (6)

correct me if im wrong but if you disconnect the fuel line at inlet manifold and turn on the ign the fuel should flow continiously as the pump trys to prime to set back pressure

correct ?????

Mark Shead

No it will only prime for a few seconds.

Mark

robvirgo

thks for the reply mark ,

how does the fuel pump prime if its open ended, am i missing something.getting a fuel pressure rig to check that am but thought id look at flow to see if we have good supply to rail,car wont pick up on nrevs and will only start intermitingly

Mark Shead

Remove the return line and put in to a can then you can measure return flow with engine running, But carefull running car with a open can.

Mark

james kiely

iTrader: (5)

are you having a few problems rob?

robvirgo

mark ,

engine only runs with fuel feed disconnected ( really and for a few seconds only...lol)

with fuel line connected it wont start ?????

james ,

tryin to sort a buddy car .......escos

Mark Shead

I would look at a fuel pressure problem, Either the pump or reg.

Mark

robvirgo

changed the reg for one i had on the shelf so would assume its the pump

cheers mark

Mark Shead

If its still on the fuel box power supply check the volts at the pump.

Mark

robvirgo

what the fuel box power supply mark , was told it had been rewired so didnt check,also had a new pump fitted last year (023 i think )

Mark Shead

Check the power supply by the boot to be sure, Not seen many problems with bosch pump but as with anything there are fakes around.

Mark

robvirgo

just to go back to my earlier q , should the pump run continuiously if open ended, surley it cant hit the pressure cut off setpoint if not dead ended ???????

Mark Shead

There is no pressure cut off as the car does not have a pressure sensor.

Mark

robvirgo

cool , so what stops the pump running then,when ign is switched on like in my saff the pump runs and then stops after a few seconds.always thought it was on a pressure signal....

robvirgo

btw does the ford start tester read l6 or l8, if so do you know the scan procedure.....

cheers again

Mark Shead

Its a timer in the ecu and wont run till it see's a crank input.

Mark

robvirgo

good to clear that up ,

have you ever seen a tps sensor disconnect light up the battery dash light.disconnected it while car was running (other car) to test therory on non running one......light has stayed on

martysmartie

iTrader: (1)

Nope won't affect it at all, if the light is on whilst running then you have a problem with the charging system see what power you are getting at the battery first though.

Martin

Rob Virgo

iTrader: (6)

Prob sorted, map sensor issue

Cheers all