I have aftermarket cams (zc, crespos) and the motor was half pulled apart by someone who didnt know what they where doing. now when i put the car back together, i just left the cams in the spot they where, even though they were just layin there.

so loong story short i just pulled them and noticed a "I" marked (hand written) on the exhaust cams sproket, and no other markings on them. how do i tell which one is exhaust and which one is intake?

Now the car has always idled like **** real bad, but runs half decent and pulls real good (turbo). Will a car run at all with the intake and exhaust cams mixed up?

How do i tell them apart by looking at the lobes?

 

one cam has a notch on it for the distributor

 

both do! its obd0 and has the can position sensor in the exhaust cam

 

if i hold them straight up, (arrow pointing up) and imagine they spin counter-clockwise, the intake valves will open first right?