2.8 crd miss fire
#1
01-30-2013, 06:54 AM
2.8 crd miss fire
have a 2.8 voyager 2005.
It has a constant misfire. I know nothing about common rail diesels but have a good base knowledge of cars.How can i determine which cylinder it is I have tried removing each injector electrical connector 1 at a time and it cuts out completely. i have also tried easing of the injector pipes at injector with engine running but again it cuts out completely.
I replaced all the rockers and hydraulics last year after a cambelt failure and the car has run fine for over 3000 miles? I bought these from a very reputable supplier.
I cant hear no air leaks or strange noises....
If i leave it to tick over it sometimes purges???
Any advice before i strip off the cyclinder head?
Many thanks in advance
Nick
It has a constant misfire. I know nothing about common rail diesels but have a good base knowledge of cars.How can i determine which cylinder it is I have tried removing each injector electrical connector 1 at a time and it cuts out completely. i have also tried easing of the injector pipes at injector with engine running but again it cuts out completely.
I replaced all the rockers and hydraulics last year after a cambelt failure and the car has run fine for over 3000 miles? I bought these from a very reputable supplier.
I cant hear no air leaks or strange noises....
If i leave it to tick over it sometimes purges???
Any advice before i strip off the cyclinder head?
Many thanks in advance
Nick
Last edited by nicksmith; 01-30-2013 at 07:02 AM.
#6
02-01-2013, 03:17 PM
at idle the pressure in the fuel rail is about 3500psi. Cracking the fuel lines is a very dangerous thing to do.
You could measure the voltage to each injector while the engine is running and measure the electrical resistance of each injector. If you find a marked difference on one then that should tell you something.
A leak back test would also show a failed injector
Does it sound odd when cranking over?, if you have access to a oscilloscope and current clamp you can measure the relative compression of the cylinders by looking at variations in current draw.
Regards
Richard
You could measure the voltage to each injector while the engine is running and measure the electrical resistance of each injector. If you find a marked difference on one then that should tell you something.
A leak back test would also show a failed injector
Does it sound odd when cranking over?, if you have access to a oscilloscope and current clamp you can measure the relative compression of the cylinders by looking at variations in current draw.
Regards
Richard
#7
02-14-2013, 07:28 AM
FAULT FOUND AND RESOLVED.
It was a faulty hydraulic tappet, even though i replaced all 16 only as few months ago. so complete strip down again.
Done it in less than a day. Just waiting for the out come from the manufacturer. As to why there was a failure of the tappet.
As for the high pressure's thank you for your advise...
You live and learn.
It was a faulty hydraulic tappet, even though i replaced all 16 only as few months ago. so complete strip down again.
Done it in less than a day. Just waiting for the out come from the manufacturer. As to why there was a failure of the tappet.
As for the high pressure's thank you for your advise...
You live and learn.
#8
02-14-2013, 02:57 PM
Miss-fire on 2.8CRD..
Ah Nicksmith,
Another after repairs fault appears. Good thing you mentioned the work that you had done as I was just going to bring it up. You can always depend on the guys on here giving ideas and and possibility of you/someone throwing away money to find fault.
Goggs.
Another after repairs fault appears. Good thing you mentioned the work that you had done as I was just going to bring it up. You can always depend on the guys on here giving ideas and and possibility of you/someone throwing away money to find fault.
Goggs.
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