Quote:
Originally Posted by kbod
First id like to thank you on how helpful you have been ever since I bought this Boxster, now for the evap system, I took off the passenger fender liner and replaced the 2 solenoids along with the charcoal canister, so for the evap system that leaves the lines themselves along with the solenoid under the intake manifold. I suppose my next move is to first do a smoke test to see if there are any post MAF vacuum leaks, then if nothing obvious shows its to test the evap valve under the throttle and presumably replace those. While the little vacuum hoses have all been replaced the vacuum canister and solenoids haven't so those might be an issue. I was also considering the possibility of a leaky injector? but that would probably throw a MIL
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A smoke test will only show you obvious vacuum leaks.
Smoke tests cannot test vacuum on the down stream side of a one-way vacuum operated valve.
Such as the one in the SAI system.
So for example a smoke test would not detect a vacuum leak in the SAI vacuum canister.
A vacuum gauge only costs around $20.00-$25.00
Anyone who tinkers with cars should have one and know how to use it.
They are a very useful diagnostic tool.
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