My 06 Colorado will just turn over at times, like it is fuel starved. You can hear the fuel pump engage when you first turn the key on so I don't think that is the problem. If you leave the truck alone for a half hour or so then try to crank it again, it will fire with no problem at all. There is a check engine light on so I had the auto parts store pull he codes. THey said it could be one of the following:
#1 purge or vent solenoids defective
#2 check connector or wiring
#3 fuel saturated vapor canister
#4 failed EVAP vent solenoid
What should I do to isolate these possible causes?
There is a faulty switch in the steering wheel column. My truck did the same thing. Next time check to see if the security light flashes next time it doesn't start. the time delay is more like 10 min.
When the truck won't start next time, get out, pop your fuel cap, and listen for a hissing noise.
If you hear it, your vent or EVAP system needs to be serviced.
My first indication is that the vent is plugged, and as the vehicle warms/cools, it's vapor locking the tank.
I would have a fuel pressure test done on it to determine the exact pressure although you hear the pump work if it is so much as off by just a few pounds of pressure it will not stay running and spit n sputter as well as a lack of power
could also be one of the sensors on the exhaust which tells teh computer how much fuel / air ratio to deliver
ask for a print out of the codes and look them up on the computer or obtain the codes again yourself by using a code reader from a parts store ...................they will allow you to use it for free .
simply plug it into you car and turn the key to on position it will give you any and all codes as it will communicate to your vehicle
SOURCE: 06 Colorado wont startat times
none of these codes will cause a no start condition.. have your fuel pressure and flow volume checked
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