Is it ok to drive with a bad knock sensor for a few days. I Havent actually checked the ECU yet but it sounds like little ticks from by the manifold and MAF. I Have to work tommorrow morning so will that actually hurt the car do you think?

 

IIRC, you won't hurt the car, but you'll definitely get bad gas mileage and big loss in performance.

 

does your check engine light have to be on to do an ECU test?

 

No...you can do the test w/o a CEL

 

how? When i start turning clockwise then stop an go counter clockwise the engine light will come on?

 

It will start blinking with your codes...0505 is the "Everything's fine, chief!" code IIRC

PS - Read the stickies!