premmington
Senior Member
- Joined
- Jan 16, 2007
- Messages
- 112
- Reaction score
- 0
- Location
- norfolk UK
- Website
- www.remmington.plus.com
Common rail injector testing (leak off method) This is very simple. I hope you can follow the following text. Remove leak off pipes from injectors, connect soft transparent 1/8" or 3.2mm pipe of the same length from each injector leak off fitting & place other end in an identical 250ml (ish) transparent bottles. Start-run the engine for a few minutes, all bottles should have the same amount of diesel in them, after the test run at idling speed. Any bottle with more fuel in it, indicates a fault with the injector connected to the bottle in question. It is possible for the injector to have a fault and have less in the bottle, but normally a faulty injector will leak off more fuel due to a worn internal injector components. If it has less derv in it, the chances are the coil in the injector is not being activated due to, dodgy internal injector coil or the host wiring to it .
My leak off test kit has six identical "tesco indian tonic water bottles" connected to a short length of wood by screws thru lid, from the inside. A small hole is bored on the neck of each bottle, to make a snug fit for the pipe to enter the bottle. The wood, has a length of welding wire connected to it, so that I may suspend the whole thing from the bonnet catch while conducting the test. Another small hole in the neck of the bottle is needed to allow air to escape. This second hole is handy to put the other end of the pipe, when testing is over, so not spilling fuel everywhere.
Larger bottles will exaggerate the test result, but four or six 500ml bottles could weigh up to 3kg when full and make a vile mess when the welding wire gives way. Oh... obvious point I missed, four bottles = four cylinder, six bottles = six cylinder.
One last thing, I have proved function several times with this method, but I've had to reach for the engine degreaser afterwards, due to pipes coming adrift.
www.remmington.plus.com
My leak off test kit has six identical "tesco indian tonic water bottles" connected to a short length of wood by screws thru lid, from the inside. A small hole is bored on the neck of each bottle, to make a snug fit for the pipe to enter the bottle. The wood, has a length of welding wire connected to it, so that I may suspend the whole thing from the bonnet catch while conducting the test. Another small hole in the neck of the bottle is needed to allow air to escape. This second hole is handy to put the other end of the pipe, when testing is over, so not spilling fuel everywhere.
Larger bottles will exaggerate the test result, but four or six 500ml bottles could weigh up to 3kg when full and make a vile mess when the welding wire gives way. Oh... obvious point I missed, four bottles = four cylinder, six bottles = six cylinder.
One last thing, I have proved function several times with this method, but I've had to reach for the engine degreaser afterwards, due to pipes coming adrift.
www.remmington.plus.com
