Injector leak back test result

Unread post by **darbuck** » 01 Mar 2023, 19:49

Hi All, I just ran a leak back test and I have three good injectors the fourth is not returning any diesel. Does this indicate a clogged injector.

Thanks in advance for any advice

Unread post by **MattBLancs** » 01 Mar 2023, 19:59

Given how little is in all of them, I'd be tempted to run it for longer. It might not give a different result, but at the moment it could be that it does "leak less" just at present less than not a lot = nowt

Unread post by **darbuck** » 01 Mar 2023, 20:17

I ran it for 3 mins which is the recommended test but there is absolutely nothing coming out of the cylinder 3 injector on leak back, It would explain why I am getting a jammed shut fault code for the no 3 injector. Thanks by the way Matt. I also think it tells me that my valves are good

. Not damaged from timing belt being out by a tooth.

Unread post by **MattBLancs** » 01 Mar 2023, 22:10

Sorry, didn't make the link to the other discussion - yes seems a likely candidate for your new poor running issue.

I think injectors can be cleaned - ultrasonically? I'm not sure if your typical "domestic" type ultrasonic cleaner is powerful enough? Would think cycling the injector on and off would also be a good idea. Am sure I have seen it done (on YouTube most likely - will have a dig)

Unread post by **darbuck** » 01 Mar 2023, 22:39

Ok I have an ultrasonic cleaner it might work. but I also bought a second hand injector off eBay so I will swap out when it arrives I am going to try swapping injector 2 and 3 to see if my issue jumps. What do you think

Unread post by **MattBLancs** » 02 Mar 2023, 09:09

darbuck wrote: 01 Mar 2023, 22:39 Ok I have an ultrasonic cleaner it might work. but I also bought a second hand injector off eBay so I will swap out when it arrives I am going to try swapping injector 2 and 3 to see if my issue jumps. What do you think

Yes, sounds a good plan. Have you got a set of the copper sealing washers too? Would be best to change those when disturbing at least a couple of injectors.

Unread post by **darbuck** » 02 Mar 2023, 12:54

No I'll order a set now thanks for reminding me.

Unread post by **darbuck** » 02 Mar 2023, 22:05

Hi lads tried to pull the Injector but wouldn't budge using a slide hammer.
Good news tried starting her and running her and she just started running nice I think the slide hammer freed the solenoid. Code cleared didn't come back so fingers crossed.

Unread post by **MattBLancs** » 02 Mar 2023, 22:08

Ha ha! Excellent news!

Either "percussive maintenance" or else the threat of violence was enough!

Hope it continues to behave, must be a relief after weighing up potential bent valves etc recently! Well pleased for you

Unread post by **darbuck** » 03 Mar 2023, 11:37

Thanks for your help Matt it really helped. The same to everyone else.

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Injector leak back test result

Injector leak back test result

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