im not really certain how to go about doing a compression check. do i need to unhook all the coils, or just the one on the cylinder i am checking?

and what are the specs anyway? what should the reading be?

 

anyone,anyone?

 

guess not......

 

I'm not sure but I think they should be 205 PSI. There is no way an engine will maintain through daily use. The key thing to look for is if one cylinder is drastically lower than the rest. If they're all within 5-10PSI your all good. Yeah, the nissan tech guy told me they take out one plug at a time then screw in the sensor and give it a crank or two on the starter. Don't start the engine or you will flood that cylinder. Where did you get a sensor? How much?

 

well i dont have one yet, but you can buy a compression tester at any parts store for about $30