2005 chevy cavalier 2.2 automatic runs very rough, shakes and when speeding up, the check engine light blinks

Asked by Aug 21, 2014 at 01:44 PM about the 2005 Chevrolet Cavalier Base

Question type: Maintenance & Repair

I was coming home from work in a different vehicle, my wife calls, says the cavalier
won't start.  I get home, grab the gas can and put what was left in it.  It starts, we get it
to the gas station and fill it up, but only fills up about another 5 gallons and the pump
shuts off.  If i remember right its a 14 gallon tank, but anywho, the next day she drives
to work and calls me to say that the car's check engine light started blinking and the
car was shaking very badly??????   Since then I've replaced the fuel filter, plugs, oil, oil
filter, and no go.  Anything?

1 Answer

70,255

Sounds like the vent valve for the gas tank is bad. Possibly stuck closed. This will cause pressure in the tank when filling up which will shut off the gas pump prematurely. It can also create a vacuum in the gas tank which will not let the fuel pump pump fuel properly if at all. Try running it, for testing purposes only, with the gas cap loose. This will cause the check engine light to come on but if the car runs ok you'll know what's going on. HTH. -Jim

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