Starting issues

[ajax591]

My gf has a 06 cobalt 2.2L. every once in a while when she starts it, itll take an extra second or 2 to start. at first it was the "must have just been a bad start or bad tank of gas" until it kept happening(not constantly but enough to notice). so i changed the spark plugs and replaced the fuel filter. couple days go by and then it happens again. its been a couple months and its done it a couple times here and there. she came home today and said it did it again so i figured id see if anyone can help me with this issue. any suggestions would be appreciated, thank you

 

[YelloEye]

Is she cranking it straight from off to crank? Fuel pump may not be priming completely. She can turn it to ON, wait a few seconds and then crank it.

 

[ajax591]

yeah shes tried that too, turn the key, wait for the fuel pump to prime and then start. its not a constant thing. just happens ever once in a while. would just like to find out what it is and stop it before it gets more expensive.

 

[YelloEye]

Making any strange noises? I'm running short on ideas.

 

[ajax591]

no noises. she turns the key and the starter goes for a second or 2 more than what it should. thats it, i dont know what it could be.

 

[YelloEye]

The only thing I can think of is fuel, spark, and air. You already did plugs and a fuel filter. Changed the air filter?

 

[ajax591]

air filter is brand new, she got the car about 3 months ago. it has 63000 miles on it. its been through a couple tanks of fuel, shes ran fuel system cleaner through it(expensive stuff, dont remember the brand)