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| 2003 Dodge Dakota 4.7l (Page 1/1) |
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Mickey_Moose
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SEP 12, 03:44 PM
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Ok, been having the code for 'small evaporator leak' come up for the last few months and I just can't seem to nail it down.
Gas cap replaced, gone through the hose and replaced the ones that were dried and cracked - and it still keeps coming up. 
Now I am not fully sure if I understand how it detects a leak - but I read that it basically pumps down the system and then the pump turns off - it then times when the pump turns back on again and as such determines if there is a leak based on the amount of time that has elasped. Is this true, if not what is the method?[This message has been edited by Mickey_Moose (edited 09-12-2012).]
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jaskispyder
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SEP 14, 03:15 PM
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could be one of the valves that control the vacuum for the test. Do you have to fix it? You may have to have a smoke test performed to find the leak.
I have this issue on my Aztek, but I just reset the code and ignore it. It happens once or twice a month.
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GreenPlatypus
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SEP 20, 05:59 PM
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I'm willing to bet the vent valve is hanging open, or the fuel tank seal has gone bad - where the pump flange seals, or even the schrader valve on the test port isn't sealing anymore. You really need to take it to a shop that can smoke test it, otherwise it is all guessing.
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Fierofreak00
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SEP 20, 09:21 PM
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Use a vaccum gauge and apply 15-20hg of vacuum to both sides of the purge solenoid and see if it drops. The leak you have is small, so it may take a little time (1-2 mins) to drop, if thats the issue. I see these go quite often here at work. That will cause a small leak every time. -Jason
14 yr Chrysler certified tech  [This message has been edited by Fierofreak00 (edited 09-21-2012).]
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Fierofreak00
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SEP 28, 10:32 AM
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