no, no check engine light at all

 

any suggestion?

 

no CEL for me either. I assume its a misfire because thats what my tunner said he believed it was, and i also thought thats what the symptoms seemed to point to, but it might not even be that. Im curious to see what the shop tells you is wrong when you take it in. Im close to doing the same cause im stumped as to how to correct this problem.

 

changed to NGK7173, not any better...dam

 

i am guess that it has to related to something that related to temperature, cause when the car warmed up, everything turns to be just fine tho

 

will that be something related to battery? this cold start rattle thing comes the second day after i change my battery tho.

 

you changed your battery which means your ECU was reset.

 

regarding your temp gauge issue. do you still have the stock ecu?

 

no, actually running on AEM EMS, i think version 1.19, so shouldn't be the problem of resetting the computer. since it rattles after i changed the battery, would it be any sensors or staff? really have no idea.

BTW,since the check engine light is not on tho, will those electronic scanner find where the problems are?

 

could this be MAP or MAF sensor problem?