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Carbon canister circuit troubleshooting?

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YOUR RESEARCHCarbon canister circuit troubleshooting?

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POST 1 / ORIGINAL POSTEROriginal post

I'm chasing down an emissions readiness monitor issue. One problem may be the carbon canister circuit. When connected to my durametric the display indicates 0.40 (somethings) @ 2500 rpm and operating temperature. When brought back to idle, the durametric display slowly drifts down to 0 somethings (takes about 60 - 75 seconds). Questions. 1) Do you know if this is correct behavior? 2) Do you know what the durametric is reading? Vacuum? / Pressure / Other? Car is actually 996 GT3, but way more traffic on this board and I'm assuming carbon circuit is similar. Ps. ECU indicates no fault codes. Thank you Craig

POST 2Original post

Have you tried driving the car to fully warmed up then park and idle the engine for 3 minutes? Some codes (at least pending) have to be developed if there is an underlying problem... Cold start, drive at least 20min, park and idle the engine.

POST 3 / ORIGINAL POSTEROriginal post

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