Thread: Fuel Trim
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Old 11-21-2013, 03:38 PM
projectSHO89 projectSHO89 is offline
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Quote:
When I start the truck,
Ignore anything before the PCM switches to its closed loop operation for a fully warmed up engine.

You have two sets of each trim, one for each bank. You have to monitor both banks and both trims for both banks to get any insight into the mixtures.

Did you ever check the infamous PCV hose and it's various elbows? It accounts for the huge majority of this set of symptoms.
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