I was tuned at @1100 ft above sea level and I live @4200 ft above sea level. I noticed that I seemed to run rich when I got home. Runs a little choppy on the low end and smoothes out. I keep fouling plugs. My question is: Would the difference in elevation affect the tune?

Thanks...

 

Depends. If the tune has proper barometric pressure correction, it wouldn't matter. It doesn't sound like the tune was done correctly to account for the difference in barometric pressure though.

What are you using for engine management?

 

chris, are you still running those #9's?

pm'd you

 

what ecu r u using? if u r using a JDM ecu then that might be ur problem. they dont have barometric correction