Testing injectors
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Senior User
Joined: Aug 2005
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Testing injectors
Hi I am farely new to the diesel world and would like to know how do you know if you have an injector going bad or not i see tons of posts on how to change them and that there bad but not how to test them. I am starting to think i have number 8 going bad and would like to know how to tell. Thanks.
Postmaster
Joined: Jul 2006
Posts: 4,993
Likes: 2
From: Bend, OR
Find someone with auto ingenuity in your area and do a Buzz test, cylinder cont. test, and a rotational value test. Its very rare to have injectors go bad, under 200k but it does happen. What are the symptoms?
Postmaster
Joined: Jul 2006
Posts: 4,993
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From: Bend, OR
I would look at the pre pump, intank and regulated return mods... If you have kept up on the maintance I doubt its going out. Where ya located at, someone around there is bound to have AE...
FYI, I have never had an injector "go out" in over 750,000 miles on PSD's.
FYI, I have never had an injector "go out" in over 750,000 miles on PSD's.
Post Fiend
Joined: Sep 2006
Posts: 7,426
Likes: 6
From: Sioux Falls, SD
Here's one of the kits that they are refering to:
http://www.itpdiesel.com/store.php?c...on=show_detail
http://www.itpdiesel.com/store.php?c...on=show_detail
Lead Driver
Joined: Jan 2006
Posts: 7,308
Likes: 250
From: Hartford, WI
Originally Posted by white Buffalo
Here's one of the kits that they are refering to:
http://www.itpdiesel.com/store.php?crn=152&rn=276&action=show_detail
http://www.itpdiesel.com/store.php?crn=152&rn=276&action=show_detail
http://www.itpdiesel.com/other/FuelS...Kit-Manual.pdf
If you look at the instructions you will see Fig 11, 12 and 13 are slightly different and have a date stamp. Those are my pics.
My only complaint on the kit was that Dennis didn't install it for me and I had to do it myself. LOL!!
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Lead Driver
Joined: Jan 2006
Posts: 7,308
Likes: 250
From: Hartford, WI
Others have mentioned some tests. HOWEVER, IMO, the only way to truely test an injector is to remove it and have them do it on a bench. That way, you can see the spray pattern and what not too.
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Postmaster
Joined: Jul 2006
Posts: 4,993
Likes: 2
From: Bend, OR
Originally Posted by aklim
Others have mentioned some tests. HOWEVER, IMO, the only way to truely test an injector is to remove it and have them do it on a bench. That way, you can see the spray pattern and what not too.
Lead Driver
Joined: Jan 2006
Posts: 7,308
Likes: 250
From: Hartford, WI
Originally Posted by CSIPSD
So your saying remove an injector you have no reason or back up to believe is bad? To bench test it? Flow rates and spray pattern are one thing, but its very difficult to "test" a PSD injector with it out of the motor.
Postmaster
Joined: Jul 2006
Posts: 4,993
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From: Bend, OR
Originally Posted by aklim
I don't know how to test it out of a motor. However, I'll bet some diesel shops will have the tools to test it for spray pattern.
Senior User
Joined: Mar 2007
Posts: 491
Likes: 0
From: Kingsland, GA
Originally Posted by CSIPSD
Yes but spray pattern can be good or bad on a perfectly operating injector... Spray pattern is nothing more then the tip, but you need to know if the injector is firing when told, and corectly...
