can anyboy tell me what tells the ecu to give power to the injectors as cant get car started.have fuel have spark but have no power to injectors.have connected a led to injector plug to see if there getting power,every now an then the led would flash but its not constant as it should be

cheers mark

 

What car is this for?

 

Check the all the earths in the engine bay, my frst wouldnt start after a 4 year rebuild. was an earth on the drivers side inner wing. All the pumps primed, plugs fired, just injectors wouldnt work.

 

gessing form the information you have given. but its normaly the cps that firs the injectors and the spark but if you are getting a spark but no injectors then you have a problem

 

its a 3dr cos

 

crank sensor

 

its a 3dr cos,just done a build up,car was running,parke it in garage overnight went next day to start it and it wou'lt start.if cps(tdc) does spark then what does phase sensor control?

 

Phase sensor = Spark
Crank sensor = Injectors

Or it might be the other way round?

 

does anybody know for sure which i.e. phase or cps sensor controls injectors so i know which to try first

 

I was under the impression that on the L1 ECU loom the "power" feed for the injectors came from the fuel pump relay and then the injectors are switched to earth by the ECU in order for them to fire.......

Might be worth looking for your 12 volts and work from there........

 

Infact, looking at wiring diagrams, all the cossie wiring looms are like this - 12 volt feed from the fuel pump relay once the ignition is on......

 

As said^^ 12v for the injectors will be constant when turned on, so check it's there first, it does normally come from where said.
tabetha

 

when you first click the ignition on the led i put in injector socket lights up but then it goes off ,so you say the best place to check is the fuel pump relay.
can you tell me where i can find such relay?
could this also be a bad earth?
as the fuel pump is priming?
ive ordered a new tdc/phase sensor today from matt lewis so when they get here im gonna whack them on gap them properly and see how it goes.

 

bump

 

here we are
try this, i use this info all the time very useful

http://www.cannell.co.uk/Ford_Worksh...sis%20Info.pdf

 

i now have injectors after changing relay but car still wont start .anymore ideas anyone?
HELP

 

cheers nelly i used this to check all the wiring. was great info!!!!

 

this sounds like the same problem i have can not get ecos started turning over alright but wont fire up...have you had the car started since rebuild mate? im just pissed off at this stage tried and checked everything, hope you get her started, cheers hugh