Question about 1998 Chevrolet Malibu
When I add gas or remove gas cap ... about 3min after starting engine I hear knocking near rear by gas tank and engine starts to stall. Any ideas. I'm thinking EVAP canister or fuel tank pressure sensor but don't know where either are located.
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Posted on Jan 02, 2017
SOURCE: 02 monte carlo- EVAP code.
hi there, you see todays cars are so emmision friendly that not even the vapors from your tank can be released into the atmosphere so what they have done is all your vapors are put into a charcoal canister to absorb the vapors and the next time you start the car it has a purge solenoid open and burn the vapors off. if you look around the intake youll see a hose with a green cap follow it back to the charcoal canister and while your doing that just check the hoses and the hoses around the canister to make sure there is no holes or cracks in them and then follow the hose from the canister to the gas tank. if every thing looks good then i would replace the purge solenoid.
Posted on Aug 28, 2008
Best not to ignore the check engine light because it also can indicate a serious running problem just as it is indicating a pollution problem now. I don't trust folks that have 'snap' answers for a given problem without any kind of testing (the fuel cap). This problem can be caused by split vent hoses or fuel filler hose, sensors that leak or read incorrectly--the list goes on. Smoke generator tests can help track this down but require intelligent analysis to replace or repair the correct component. Finding someone like this to take the time to be at least fairly sure of a cure before loading the car up with unnecessary parts is a rare find. Good luck!
Posted on Jul 17, 2010
in my experience the usual culprit is the evap cannister. the problem is it gets moisture in it and freezes during winter thus cracking the plastic. if you lay under the car and look at the evap box it black plastic and if you see a loose or cracked hose or the box itself is cracked that is most likely it. as a side note you can check the gas cap and buy a new one to see if that rectifies the situation. lastly i don't think the gas tank should be suspect as you would probably notice if gas was leaking out of the tank. if you take the car to a dealer or shop they can do a smoke test and determine where the leak is.
Posted on Oct 19, 2010
I do not think canister, but a little bulb on or beside the canister is the problem. it seem to me i seen this on motorweek, on the garage part. hope this helps.
Posted on Jan 03, 2011
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