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2003 Kangoo 1.5DCI - no fuel pressure.

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3.3K views 4 replies 3 participants last post by  ours2012  
A
#1 ·
Hello.

After the cambelt snapped I have replaced the engine on this car with a 2nd hand engine which came complete with injectors but not fuel pump. I have fitted my original fuel pump and timed it properly but left the injectors in that came with the engine. I know I will need to code the injectors at some stage (or fit my original injectors).

Yesterday I had the first go at trying to start the replacement engine. It wouldn't start which didn't suprise me too much but I had my laptop connected and it was registering effectively zero fuel pressure. I know my pump was good. I am presuming at least one of the injectors fitted to the replacement engine is stuck open?

I am planning on trying to remove my original injectors from the old cylinder head and fit them but I am curious as to how I would diagnose which of the replacement injectors is causing the problem? I presume a healthy injector with the electrical connector disconnected should produce zero leak off - is this correct? Would an injector that is stuck open produce leak off even at cranking speed?

Thanks in advance.
 
#2 ·
Before you get too carried away........
Yes injector leak can cause starting issues and yes, a leak off test at crank speed should show.
You may have the problem that fuel has gummed up or dried in injectors if they have been left dry for too long.
No, electrical connection has no effect on leakoff, mechanical system only

But, diseasals are notorious for starting issues when starting dry.
Pump primer till hard, get some easy start and a helper, pump primer hard again, get helper to try starting while you keep pumping primer and squibbing easy start in. Best into turbo mouth/intake but after air filter if you can't get to that.
If it fires, keep squibbing until it runs on its own.
 
A
#3 ·
Thanks for the reply.

I think you could be right about the injectors being gummed up. I don't think the replacement engine had been stored particularly well.

I did have a go as a last resort with easy start. It worried me a bit because the engine sounded like it was struggling to turn over - I wonder if the easy start was combusting on the upward stroke? There was a bit of popping and banging but the engine didn't run. It does looks like at least one of the injectors is not seated very well as occasionally we saw fumes escape from that injector.

I'm going to see if I can get the injectors out of my original cylinder head (which we removed to inspect for damage when the cambelt snapped) and take it from there.
 
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