Check engine light on 2001 Pontinac Firebird 2001 V-6
I have a Pontiac Firebird v-6 2001, check engine light comes on the code
shows for evap... Everyone mechanic wants to run smoke.Is there another
check first.. Have changed sensor for rear, oil sensor, oil filter, oil, new plugs,
wires, and run engine clean.
You must have a po442 code, Evaporative Emission Control System Leak Detected Small Leak 2 things that are in the system that you may try first, the Vapor Canister Vent Solenoid, about $25, and this can be tested to see if it is working, and the Vapor Canister Purge Valve, about $40, but rarely goes bad. The VCVS is what usually goes bad & like I said, can be tested first. Otherwise a bad gas cap and filler neck could be the problem. The smoke test would check hoses and connections which is usually a last resort.
You can run a smoke test at home. Pull the brake booster line and attach another hose to it and blow cigar smoke or cigarette smoke though it. Then follow the smoke. I did this on my 2000 Pontiac firebird hatchback.
Do you have the engine running when you do this or not. Sounds pretty cool, and sounds like it may work.
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