2002 Chevy 4x4 Wiring Schematic

Check the hose clips for tightness and inspect the trunking for any cracks or splits and moreover all the vacuum system, the small bore pipes and fittings for cracks and missing parts. The best showing off to locate a leak is to have the engine organization and warm and after that vaporizer lighter gas /propane or brake cleaner roughly each joint in turn. If the engine rev s occurring you ve found your leak.

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Might afterward be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can pull off a quick irregularity locate if you unplug the meter and control the engine without it. if the engine condition is the same subsequently chances are the meter or the relationship to it is faulty. Its then worth cleaning the MAF sensor wires, as they can acquire coated taking into account dirt beyond era which next offsets the reading. Use some door cleaner or brake cleaner to spray onto the wires to sever the dirt on no account adjoin the wires like everything as they are enormously fragile

have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you occurring to date upon every maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms occurring and is warmed up? oftentimes in engine take steps many factors may cause the same symptom(s)

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