Datatek
Well-Known Member
Sounds like it could be a couple of knackered injectors. Try slacking of the fuel pipes at each injector in turn to check there is fuel and bleed any air. Wear gloves and goggles, high pressure diesel is dangerous.
It rings of MAP sensor not sending proper signals to ECU it does not matter how much manifold pressure it has if the ECU is not providing boost fuel you will not get power. The fuel feed is pressurised it cannot suck in air, fuel can only leak out.
You need good diag on it, you would see the problem immediately if it is indeed as i say above.
Map sensor. Pin 1 Blue/yellow is signal to pin 54 ECU. Pin 2 Brown/green to pin 13 ECU. Pin 3 White to pin 51 ECU. If the MAP sensor is working correctly. With engine running and revved you should get a variable voltage to pin 54 ECU as the revs rise and fall.
Maybe a leakoff test on the injectors to varify you dont have a jammed open injector?
If he had a jammed injector he would have smoke and crap all over the place. Problem is MAP sensor.
Very true.. it be smokin' like goodn'..... The diag would reveal the map sensor value change when revving the engine,that is if its functioning correctly.If he had a jammed injector he would have smoke and crap all over the place. Problem is MAP sensor.
You have checked the pipe and the exit from the manifold isnt blocked?
Has someone asked already
Very true.. it be smokin' like goodn'..... The diag would reveal the map sensor value change when revving the engine,that is if its functioning correctly.
You have checked the pipe and the exit from the manifold isnt blocked?
Has someone asked already
Post # 3.
Datatek
Well-Known Member
No smoke if the injector is not opening.Very true.. it be smokin' like goodn'..... The diag would reveal the map sensor value change when revving the engine,that is if its functioning correctly.
You have checked the pipe and the exit from the manifold isnt blocked?
Has someone asked already
But very uneven running he does not report that.
Is there a Nanocom or similar near you on the LZIR map?
Devon. Cannot remember who is down that way. @PastyMuncher83 might know if there's a member down that way with a Nanocom.
You have lost me where does he say that?
Datatek
Well-Known Member
Early on he said that removing the leak off showed no fuel leaking off from the injector.
I suggested he cracked off the fuel pipe nuts at the injectors one at a time to check for fuel and remove any air.
Yep read through and seen that now. If the injectors are in good nick there should be leak off. They are designed with loosish tolerance to avoid goring that is why you need leak off pipes. Maybe they need servicing. But that said it is unlikely that is causing his loss of power. I still favour the MAP sensor being dicky.
stemac33
Well-Known Member
Have you tried the fuel flow test In tech archive by wammers.
Checking diesel fuel pump flow rate.
Just a thought as when I swapped engines in mine I couldn't get it to bleed. Found when I change the intank pump I had got the lines crossed so it was pumping fuel to the leak off side instead of the filter but the car started and ran ok.
Checking diesel fuel pump flow rate.
Just a thought as when I swapped engines in mine I couldn't get it to bleed. Found when I change the intank pump I had got the lines crossed so it was pumping fuel to the leak off side instead of the filter but the car started and ran ok.
brianp38dse
Well-Known Member
I can confirm that they drive very sluggish with out a map sensor, its not to as bad low revs low speeds but try and give it some throttle and not a lot will happen and lifting of then back on a little it seams to help and hills forget it just slows down,
so worth a look at as wammers said .
so worth a look at as wammers said .
What's goring, chap?
Two pieces of metal rubbing together and marking the surface finish or causing the parts to seize.. Moving parts in injectors have fairly generous clearances to prevent goring and/or particles in the fuel from seizing them. That is why you have leak off.
Thought it might be. Same as scoring then. Cheers.
