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October 31, 2024 — Random Misfire

By tysondavis57 | Oct 31, 2024 12:00 AM | 3 views
October 31, 2024
Random Misfire

I removed passenger side valve cover, and hand cranked the motor. I found #6 loose and not moving. I thought I heard tapping coming from both sides. Is there a possibility that two AMF lifters will stick?

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Replies (3)

By tysondavis57 | Sep 1, 2026 8:26 PM
Nov 06, 2024

I did everything you showed me to. The '09 Suburban with 205k miles has the lifter released, DOD deleted, new spark plugs, same old gaskets. She has 38-40 psi oil pressure at idle and 45 psi at 1500rpms. I am so grateful for your time. I'll throw you a bone when I recover financially. Go America!!
By tysondavis57 | Sep 1, 2026 8:26 PM
Nov 03, 2024

Just a lil follow up. It was #6 intake. I hummed the Fibonacci sececence for ten minutes, tapping hard, not so hard rapidly, 1, 1, 3, 5,8,13. taps per session. Trying to produce a spiral of vibrations. It worked. Push rod shot out. Reset the pushrod /lifter with tinks until it tonked. Checked the work, and $$$$$$$$$$.

Boom Booyah. Reusing old gaskets, they look non degraded. The op loss was 6loose VLOm bolts. Cut the inside gaskets out of the gasket, will mod valve cover, awaiting ECU from LS1. Probably be running tomorrow.
By Crazed Performance Repair | Sep 1, 2026 8:26 PM
Oct 31, 2024
"

It is possible but unlikely. The more likely vehicle to have that happen if it is to happen would be the newer stuff with direct injection. This is because the VLOM is prone to leaking pressure into the lifters when the system is not commanded on.

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