New injectors = Now running like a bag of nails?

B

Border Terrier

New Member

Posts

7

• Jan 16, 2012

• #1

New injectors = Now running like a bag of nails?
Firstly, thanks to all who helped with my timing chain query.
On a different subject, i have just fitted new injectors to my 1979 series 3, and it is now running even worse than ever. It sounds really rattly.
Before replacing injectors it was ok, but had to replace injector no.4 due to damage recieved after a hotspot failure. So thought i would do the whole set, to keep things on an even basis.
Fitted them yesterday, bled the fuel system of air, turned the key and now have the rattliest, noisest diesel i have ever heard! Do any of you guys have some advice? Seems to idle but a wiff of throttle creates plums of smoke and a death rattle. Have i ballsed up somewhere and missed something?
Is it possible that the old injectors were firing at the wrong pressure due to wear and tear (late so pump timing has to be advanced to compensate), and now new injectors are fitted the timing is way too advanced? Any thoughts will be most welcome.

I wait i hope of sanity, have even started looking for alternate methods of transport.

Cheers

BT

 

jamesmartin

Well-Known Member

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91,879

Location

louth lincs

• Jan 16, 2012

• #2

whole engine will be worn to some degree including pump and injectors,pump wear is often compensated by wear injectors and adjustments,new injectors can be too much ,i would get injectors checked its not unusual for new/refurb ones to fail ,did you fit both washers copper and steel

 

B

Border Terrier

New Member

Posts

7

• Jan 16, 2012

• #3

Yes both washers have been replaced, thanks for response.

 

N

nongrokal

Active Member

Posts

184

• Jan 16, 2012

• #4

sounds like a faulty injector, slacken of each pipe in turn and see if the noise stops, if so then that injector is bad.

 

B

Border Terrier

New Member

Posts

7

• Jan 16, 2012

• #5

Hi, thanks tried that first, no joy. Like i mentioned all the injectors are new. The symptoms to me seem to be over advanced so will mess about with the pump tomorrow.
Nothing ventured, nothing gained and all that.

Thanks anyway.

 

jamesmartin

Well-Known Member

Posts

91,879

Location

louth lincs

• Jan 16, 2012

• #6

where did you get injectors from you can get usless ones ,its often better to get old ones refurbed with geuine nozzles

 

elsie

Well-Known Member

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1,300

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the very wonderfull Conwy Valley

• Jan 16, 2012

• #7

have you reset the pump timing ??

 

B

Border Terrier

New Member

Posts

7

• Jan 17, 2012

• #8

No not yet, thats todays job, my suspicion is that the the pump is now too far advanced,
but really needed a confidence boost before messing with anything. Like i have said, have checked the systems in a reasonably logical order - Bleed fuel lines of air, crack off injectors whilst running, to confirm they are functioning. So i guess now is pump time.

Thanks for the advice.

BT

 

tacr2man

Well-Known Member

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3,928

Location

England

• Jan 17, 2012

• #9

If its black smoking sounds like its overfueling ie injectors set up wrong

 

D

divie

Well-Known Member

Posts

1,121

• Jan 18, 2012

• #10

Before you panic i had the same problem and found that on one injector i had trapped the sealing washer. Replaced that and all ok. I came close to pulling the engine out it was so bad the navy could use it for laying smoke!

 

pef77

Active Member

Posts

213

Location

bristol

• Jan 20, 2012

• #11

had similar problem after having the injectors o/hauled and eventually plucked up courage to rev it a bit and it cleared so could have been a sticky injector... took alot of guts to do cause it sounded like it was about to blow up....