Jul 24, 2024

I tried it again and yes the intake rocker quit after 5 cranks

Jul 24, 2024
"

To check the VLOM you need to pull it off and pressurize the main oil port under the oil pressure sensor with air and check for leaks. Those solenoids are normally closed so without power to them they shouldn't leak. I still think it's going to be a spun lifter though. These VLOM (07-13) rarely have a failure where they leak like that. Besides that, if the VLOM was leaking it would effect both lifters not just one. You most likely didn't have oil pressure build up and you would have to do the test twice in a row. I should have probably mentioned that as well.

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Jul 24, 2024

I cranked the engine with key off , both rockers move after 6 cranks, however you said the vlom must be on, how I do that?

Jul 24, 2024
"

Not likely. If the VLOM was the issue it would effect both lifters on that cylinder since there is one solenoid per AFM cylinder. You most likely have a spun lifter, using the starter relay with the keyu00a0off,u00a0spin theu00a0engine over. Make sure not to jump the wrong terminals as it could damage the ECM. (Vlom Must be on for this test). While it is spinning watch the suspectedu00a0rocker move. Make sure that it rocks at least 6 to 7 times before you let up on the starter. If one rocker stops moving before then it is getting fed oil pressure and is likely spun. You can determine this by looking at the side of the lifter. To see the side of the lifter you need to pull the VLOM and clean out the oil tower of the suspected lifter with cleaner and shop air. Once cleaned you can look down the oil tower and if you see a hole in the lifter it is not spun. If however you see only shiny metal or a flat surface then the lifter has spun due to a bad plastic lifter guide. When this happens you will need to replace the camshaft and all lifters. This would be a good time to do a full AFM/DOD delete where you remove all AFM components and replace them with non AFM components.

I do now offer AFM delete kits for select models. Be sure to check my website for your engine.

https://www.crazedperformancerepair.com/afm-delete-kits

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