Disco 2 TD5 cranks over but will not fire

[zac220193]

Hi everyone,

I just wanted some help and advice with a suspected injector harness issue.

I recently bought a Discovery 2 TD5, it was running fine when purchased but me being me I decided to give it a few days of TLC and check over everything and do a complete service.
I pulled apart and cleaned a lot of items and everything was reassembled correctly. Upon completion I tried to start the car but I had no luck. The car manages to crank over absolutely fine but just will not fire. I have changed the fuel pump as I was told the stock ones tend to clog up around the same amount of km's mine has, fuel is getting past the pressure regulator as well.
The only other issue I can see is that the injector harness has failed and will not open the injectors. I did find that one of the electrical pins were slightly bent but that was straightened but with no luck of making the car start.

Am I heading down the right track ? or are there any other issues that could prevent the car to crank but not fire ???

Any help or advice would be greatly appreciated.


Thank you in advance.............

[sierrafery]

Hi, measure voltage on the battery while cranking, if it drops below 10V the starter still spins well but the ECU will not open the injectors so you have to give a good charge tio the battery or replaceit with a new powerfull one... did you run the 5 pedal purge sequence after you replaced the pump?

[djam1]

An injector harness is unlikely to cause it not to start. run rough yes but not starting is more than likely related to a system that hasn't been bled properly.
Turn the ignition on and hit the throttle pedal 10 times in 10 seconds (might be 5 in 5) and the engine light will come on and the fuel pump will run a full bleed cycle.
The other thing that will cause non starting is the crank position sensor (did you mess with this?)
Get a nanocom or similar on it to find out what is actually wrong throwing parts at a TD5 to solve an unknown problem will get expensive.
Oh and don't use cheap fuel pumps




Hi everyone,

I just wanted some help and advice with a suspected injector harness issue.

I recently bought a Discovery 2 TD5, it was running fine when purchased but me being me I decided to give it a few days of TLC and check over everything and do a complete service.
I pulled apart and cleaned a lot of items and everything was reassembled correctly. Upon completion I tried to start the car but I had no luck. The car manages to crank over absolutely fine but just will not fire. I have changed the fuel pump as I was told the stock ones tend to clog up around the same amount of km's mine has, fuel is getting past the pressure regulator as well.
The only other issue I can see is that the injector harness has failed and will not open the injectors. I did find that one of the electrical pins were slightly bent but that was straightened but with no luck of making the car start.

Am I heading down the right track ? or are there any other issues that could prevent the car to crank but not fire ???

Any help or advice would be greatly appreciated.


Thank you in advance.............

[Pippin]

An injector harness is unlikely to cause it not to start. run rough yes but not starting is more than likely related to a system that hasn't been bled properly.
Turn the ignition on and hit the throttle pedal 10 times in 10 seconds (might be 5 in 5) and the engine light will come on and the fuel pump will run a full bleed cycle.
The other thing that will cause non starting is the crank position sensor (did you mess with this?)
Get a nanocom or similar on it to find out what is actually wrong throwing parts at a TD5 to solve an unknown problem will get expensive.
Oh and don't use cheap fuel pumps
X2

[discorevy]

never heard of fuel pumps "clogging up" at x amount of kilometres, as mentioned hopefully isn't a cheapie, 5 pumps of the pedal for purge sequence , is the pump making a nice even tone when ign is first switched on ?
also try locking the doors with fob , then unlocking and try starting, to eliminate a miscommunication of immobiliser

[PhilipA]

Maybe try to do a windows reboot.
Lock with the key fob then unlock with the key fob.
If there is some RF interference they can do this.

Also do a prime by turning on the ignition and pumping the accelerator 5 times then wait for a while until you hear the fuel pump stop.
3rd possibility, reset the impact sensor on the firewall.

Regards Philip A

[John_D4]

It does have fuel in it doesn’t it? I had an issue within the last 12 months where the gauge was reading 1/3 but the tank was actually empty.

Just a thought.

[bsperka]

Perhaps you should list what you pulled apart and cleaned. This may provide some pointers to what the issue may be.