using autoengineuity to check injectors
Postmaster
Joined: Aug 2004
Posts: 3,948
Likes: 2
From: SHELTON, WA
buzz test checks the wiring and the solenoids to make sure they are working. do that first. if you hear the idm buzz and then 8 buzz's that part is good.
then for the actual injector do a cylinder contribution test. make sure the eot temp is above 160* the closer to 200* the better. the pcm wont let you run the test with it lower than 160*.
dont do anything with the truck while its running doing the test. just let it do its thing. its scary the first go around.
buzz test done with engine off.
cyl cont done with engine running.
then for the actual injector do a cylinder contribution test. make sure the eot temp is above 160* the closer to 200* the better. the pcm wont let you run the test with it lower than 160*.
dont do anything with the truck while its running doing the test. just let it do its thing. its scary the first go around.
buzz test done with engine off.
cyl cont done with engine running.
Postmaster
Joined: Aug 2004
Posts: 3,948
Likes: 2
From: SHELTON, WA
well the buzz test scared me didnt know what to expect.
and the cyl cont test just doesnt sound good. but you will get used to it.
and the cyl cont test just doesnt sound good. but you will get used to it.
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Lead Driver
Joined: Oct 2004
Posts: 7,413
Likes: 1
From: Columbia, MO
Originally Posted by amiller93
Also you can monitor the "Rotational Velocity Change %" in live data to "Watch it" during a test drive
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Post Fiend
Joined: Jun 2006
Posts: 5,497
Likes: 7
From: Central, Al
On the live data screen in the drop down there is a selection for "Rotational Velocity Change Cylinder X" X being the cylinder number. It gives you the live data the CCT uses during a contribution test.
Also during a CCT there should be no noticable difference in the sound of the motor (that is from the Service manual) But the KOER will make alot of strange noises
Also during a CCT there should be no noticable difference in the sound of the motor (that is from the Service manual) But the KOER will make alot of strange noises
Lead Driver
Joined: Oct 2004
Posts: 7,413
Likes: 1
From: Columbia, MO
Thanks alan. Looks like I've got some observing to do. Do you know what kind of nubers I should be looking for or watching out for in the roataional velocity display? If it's similar to others I've seen, it's like a golf score, the higher the number the worse off you are.
Senior User
Joined: Aug 2004
Posts: 352
Likes: 0
From: Racine Wi
ideally, the numbers would be all 0's, but I think acceptable is anything under 5%. If you have any one or two that read different than the rest, then you might consider checking out those cylinders for issues. If your truck is running fine, then I suspect you will not see anything larger than 2's. I ran my truck last week and had #8 showing up to 3.4% at idle, but as soon as I picked up RPM, all 8 cylinders went to 0. IT WAS A GOOD THING!
Post Fiend
Joined: Jun 2006
Posts: 5,497
Likes: 7
From: Central, Al
CCT will fail a cylinder if it is over 4% i believe the live data on mine stays below 0.6%.
Unless you have a real bad problem the Change should go to 0.0 with throttle but also the change will normally be at its highest when coming back to idle and then stabilize. Its the stabilized idle numbers that mean the most.
Another thing fun to watch is how fast the ICP responds to throttle and how the IPR resonds to the ICP
Unless you have a real bad problem the Change should go to 0.0 with throttle but also the change will normally be at its highest when coming back to idle and then stabilize. Its the stabilized idle numbers that mean the most.
Another thing fun to watch is how fast the ICP responds to throttle and how the IPR resonds to the ICP
Post Fiend
Joined: Oct 2003
Posts: 5,903
Likes: 1
From: MICHIGAN
Originally Posted by amiller93
Also you can monitor the "Rotational Velocity Change %" in live data to "Watch it" during a test drive
someone explain this to the other half for me
I'm off to buy a Autoenginuity right now.
