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Discussion Starter #1
Good evening.

What is the limit on a leak off test to determine if the injector(s) needs replacing.

Corsa D 1.7 CDTi (A17DTS)
I've done a test with engine at operating temp, sat on idle for 3 mins and the results were:-

Cylinder 1 - 30ml
Cylinder 2 - 35ml
Cylinder 3 - 40ml
Cylinder 4 - 42ml

I did see online that a diesel specialist has said that anything over 30ml doing the same as I did is a dud injector, but as the amounts are quite close is it just normal for my injectors or are they all shagged?
Thanks
 

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Premium Member
2012 sxi 1.2 5 door in black
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812 Posts
Just had one of my return pipes snap on astra 2.0 cdti, lost around 3 gallons over 30 miles, still I wasn’t paying double time for a Sunday night recovery on the principle of it, yes the car stinks of diesel, it was vx only part but sorted for £90. There was plenty of diesel in engine bay so 30 ml x 4 injectors x 20 mins, doesn’t seem excessive but have a chat to a diesel specialist and see what they have to say and if the injectors are 💩 I wonder if the 2.0 astra j ones are any bigger flow? Bigger flow, more fuel, remap. Just saying 😆
 

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Had the all plastic plugs on the return pipe snap so I've had to order a new one, was only £13.50 plus an extra few quid on clamps etc. Need to find a Vauxhall specialist as each car has a different return flow amount.
 
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