Question about BMW X7 Series
Very small leak detected
Posted by Anonymous on
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Posted on Jan 02, 2017
a small evap leak is often interpreted as a loose gas cap , which it can be , it means the evap systems integrity has been breached , it can be an electrical solenoid , switch or just a vacuum line in the system . a bidirectional scanner can run the evap test after checking the gas cap , most well equipped shops can hook up a smoke machine to the evap system service port and run the smoke test , it there is a leak you will see the smoke , makes the diagnosis quickly . get an estimate from a reputable shop , by the way this problem has no effect on drivability , but should be fixed . cheers
Posted on Jan 13, 2009
Usually the source of the leak is the gas cap (either loose or defective) but if that doesn't apply to your issue then the canister is next to the gas tank.
Posted on Jun 09, 2009
check gas cap and make sure on good, if possible find another one to try on car to see if that works clear codes before trying(take neg cable off battery for approx ten minute) or might have leak in vaccume line or canister
Posted on Sep 03, 2009
check ur gas cap for tight and proper seal that is the most common problem for the the evap codes if cap is good check fuel and vent lines for damage or leaks from gas cap under vehicle up to engine compartment
Posted on Oct 18, 2009
The best way to find these leaks in these systems now adays, is to take it somewhere that does smoke tests. What they do is inject smoke into the system and if there is any little leak the smoke will come out of it pin pointing the leak. There might be a pin hole in one of the vaccum lines, or the plastic casing on top of the evaporative purge valve could be cracked. The smoke test will find it.
Posted on Mar 30, 2010
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