GTkllr

I've had a problem with my 00 z28 since I bought it and the previous owner said it started after he had changed the cam and crank sensor. It'll sometimes start on the first try and sometimes it'll take anywhere from 2-9 times to make it start. It'll just sit there and crank and pop through the exhaust. Pretty embarrassing. It's not throwing any dtcs. Runs good though after it turns on. Seems to do it more so when it's colder out for some reason.

randys101

Hymmm.... Sounds like it needs a calibration, maybe??

99 ss

iTrader: (12)

Yes I’m having the same problem it sometimes don’t start on the first try I will have to turn the ignition on and here the fuel pump and then after that it will start right up don’t know what’s the problem it might be are crank sensor might be going bad

randys101

Try a new crank sensor then calibrate.

NoSmokies

Try replacing crank sensor (easy job) then have someone re-learn the procedure on both crank and cam to synchronize. Some reputable race shops or dealerships should be able to do this for you.

bbond105

Check the fuel pressure on start up. The check valve in the fuel pump may not be holding. Cycling the ignition a few times will repressurizing the fuel lines if the fuel pump relay is working.