bwhite8889
Active Member
80,000 miles on an Expedition we bought a few months ago.
Already had VCT work done to address startup knocking. This new knocking is worse than what I was hearing before the VCT. Already verified it’s not the wastegate actuator arm.
I always fill up with 87 octane but last night I added octane booster and it immediately quieted down. This morning the knocking came back. Is it because these engines need 91 octane and mine is still burning through the 87 even with the booster? Also bear in mind that the engine is still “re-learning” timing since the front end of it was off for the VCT work. Not sure if that’s part of the issue. See link below for before/after octane booster videos.
Already had VCT work done to address startup knocking. This new knocking is worse than what I was hearing before the VCT. Already verified it’s not the wastegate actuator arm.
I always fill up with 87 octane but last night I added octane booster and it immediately quieted down. This morning the knocking came back. Is it because these engines need 91 octane and mine is still burning through the 87 even with the booster? Also bear in mind that the engine is still “re-learning” timing since the front end of it was off for the VCT work. Not sure if that’s part of the issue. See link below for before/after octane booster videos.
iCloud
Sign in to iCloud to access your photos, videos, documents, notes, contacts, and more. Use your Apple ID or create a new account to start using Apple services.
share.icloud.com