c270cdi injecter problem

c9rcy

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hi there all, i recently had car in and hand new mass air flow and also 2 injecters sorted,no's3 & 5.car ran fine for 2weeks untill today when it wouldnt start.tried some easy start which got her going. after having a look around i noticed diesel blowing from injecter 2.i took no2 out had a good clean up changed the copper washer,put bk together. she started up fine took for a spin down carriage way all was fine.got bk turned off then tried to start again,when she fired up there was a loud clunk and the car rev'd hire for a couple of seconds then bk to normal.there was also a little smoke that came from the top of no 2,but no diesel had blown out?? left her ticking over for about 30seconds all seemed ok no odd noise,no odd revin but after turning off i tried to start again,once but no joy.any ideas anybody.thanks in advance. ps car has 68000 on a 52plate.
 

kebo57

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Hi and welcome to the forum
Don't know about the loud clunk but it sounds like the injectors aren't sealing properly you can test this by filling the cavity around each injector with soapy water and if you look closely you might see minute bubbles that will show that they are leaking, then you need the re-seat the injectors

Kevin
 
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star

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you need to see if you have air in the lines or you have a fuel pressure problem. Test leak off on the injectors.
 
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c9rcy

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yep i was thinking i may aswell do that but the clunk and bit of smoke from number 2 is bothering me,i was thinking no 2 may be shot??
 

kebo57

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yep i was thinking i may aswell do that but the clunk and bit of smoke from number 2 is bothering me,i was thinking no 2 may be shot??
could be that liquid deposits around the injector where blow out and vaporized which looks like smoke because of the leaking injector seat also do a leak off test like star said

Kevin
 

Alex Crow

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have you checked for air bubles circulating in the clear plastic fuel pipes? common problem for poor starting. usually happens after someone has changed the fuel filter. the sealing between the top and the body of the housing is poor and easy to get an air draw there.

as said the other common cause of poor starting is the excessive leakoff from the injector/s, it is usually VERY obvious when you watch the leakoff!
 

MB TECH WARRINGTON

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non start which usually starts on easy start is usually faulty injector, you will need them checking on star
 

Alex Crow

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can't check leakoff on star! just take the pipe off and watch.
 
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