1999 E46 320d engine harness plug

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  1. 1999 E46 320d engine harness plug 
    #1
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    Need some urgent help guys,

    Just changed the high pressure diesel pump on my 320d (after spending £640 getting it over hauled).

    Finished the job except for one plug that in not sure where it goes??

    Its the plug right at the very top of the diagram in the middle

    cheers



    Its the one following on from the air mass meter plug

    sorry cant seem to get pidc to show, please look at the URL it takes you to realOEM
     
     

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    right scrap my previous, i found where it goes.

    Problem i have now is that the car wont start? any ideas?
     
     

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    More info...
    Does it turn over?
    What were the main things you have done.
    Mention everything from the last time it was driving OK, and why the pump was looked at.

    A low battery will hide itself with all other electrical systems working, just the car refuses to turn over. Likewise, I wonder if there is some sort of first run priming that needs to do done.
     
     

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    Right, stopped working one day, had diagnostic check done and came back as "faulty high pressure diesel pump". Took it off and had it tested and confirmed as faulty, had it overhauled and fixed.

    Just put it back in, hell of a job but got there in the end, engine turns over all thats missing is that "spark" to fire it up so to speak. Cracked off injector fuel supply's and there is fuel present at all four. Removed air intake pipe and it lets out the usual "combustion Mist" i guess ill call it.

    But it just wont fire up.
     
     

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    So you should be able to see the white fog of the diesel at the exhaust

    From what i can see, there are a number of important things that should have been done when refitting, one is getting the timing right, and another is getting the pump phase set up which means a dial indicator on the pump shaft, there is a half moon shaped groove in it, and it needs to be set with the half moon bit turned to and exact depth that is stamped on the side of the pump.

    It's not a pump like any other style, it is more similar to a tiny engine that compresses shots of diesel and squirts them to the injectors as exact times, so it does need to be in the correct spot.
     
     

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    Ive not noticed any mist at the exhaust, ill check.

    The pump phase was set up at the specialists and they locked it ready to be put back on and thne unlocked when on the vehicle. I locked the flywheel when i put the pump back on so that the timing limed up ok with the pump.

    It also sends out the shots of diesel as ive taken off the fuel hose to the injector while its cranking.
     
     

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    It could still be out 180 deg.

    Locking the flywheel at TDC is OK, but there are 2 TDCs, one for compression, and one for exhaust.

    You might need to go back and check, you'll need the pump set fir TDC again, which looks like it will need to come out.
    The groove in the pump shaft where the drive sprocket fits has to be pointing diagonally at the outlet for cyl 2 on the other end.

    If you take the oil cap off, you should be able to look inside at the cam, and there will be TDC mark which is for TDC comp. cyl 1.

    That's the TDC you need.
    If you have done that, then it should be OK, and we'd need to look elsewhere.
     
     

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    Ok cool, ill have a look into the TDC mark through the cap and see where it its, but i dont believe that anything had turned as much as 180degrees between the time the pump was taken out and put back in so it should really be in the right place. Am i wrong in assuming that?
     
     

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    the pump could have been taking out whilst the engine was in any position, timed /aligned out of the car, and it could have been the pump out compared to the engine.

    If you know how to lock it again, and it will only lock at TDC (i can't be sure of this) trying locking it and seeing if the engine TDC has the visible score on the cam, you need to look in at an angle, the line would be maybe an inch away towards the back of the engine from the filler cap.

    If the pump can be locked in any position, then it's a bit more of a pain in the ass, as i was hoping to lock the pump, turn the engine over once (360deg on the crank to TDC again) and then reconnect.

    The cams and the pump turn at half the speed of the engine, so to squirt diesel once per every 2 turns for each cylinder.
     
     

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    Update....

    Pump is back out and being phased at the diesel specialists! it seems that it has to be within 0.000000001 of a degree to be in the correct place for the timing!!!! hmmm you cant just guess at that...

    Also ive now had the injectors tested and 1 was blocked, 1 was hosing, 1 was not great and the last wasnt too bad.. So they are all being overhauled with new tips etc.

    Just now awaiting for them to be done, (parts From Germany im afraid).

    Im gonig to change the glowplugs also and hopefullly i feel that ive covered alll bases, and fingers crossed it will start first time..

    Ill let you know what happens
     
     

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