My trucks pulling a lean code ??
My 2000 burb with 200,000 miles just kicked a check engine light and its a lean bank 1 code ??? anyone ever get this ??
Forum Discussion
Chuck_thehammer wrote:
an intake leak, hose or manifold ... pull extra air into engine.
cheap and easy check.. with engine idling, use WD40 and spray around vacuum hoses and where the intake makes contact with gaskets and heads, and a round the TBI.
the idle speed and pitch will change when the WD40 enters into leak.
Start the vehicle and let it idle. Take a propane torch. Open the valve. But do NOT light the torch. Point the tip of the UN-LIT torch (with gas flowing) around hoses, head gasket surfaces, etc. When the idle picks up (increases) you have found the (at least one) source of the leak.
