bad tune or bad valvetrain
08-30-2008, 01:17 PM
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bad tune or bad valvetrain 
so i used my hp tuners to scan my car as i did some thrashin to tryand figure out why i have a hickup between 5000-6000 rpm. car pulls hard any other rpm but up around in there not so much an dif u listen closely it sounds liek its skippin beats. i have done plugs, wires, fuel filter, pcv as far as tune-up stuff goes. here are the scanner logs maybe some oen wil see sometin that i dont. just trying to figure out if its just the tune or did somethin in my vavletrain die. thanx 
08-30-2008, 02:04 PM
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no KR was found and as fo rthe a/f ratio i dont have a wide band. i did adyno back in spring and it wasn't too far off so i adjusted it then. i stil ha dthe same hick-up that day as well. and also i just swapped out my o2 sensors as well.yeah any one will ned the hp tuners inorder to look at it
08-31-2008, 08:05 AM
#5
The first thing I notice is that at higher rpms your throttle position is actually decreasing. You're going from 100% down to 94-96% throttle. Not sure how much of a difference that will make, but talk to Joe Gibbs racing about how much less power a partially closed throttle body makes.
08-31-2008, 09:01 AM
#6
The first thing I notice is that at higher rpms your throttle position is actually decreasing. You're going from 100% down to 94-96% throttle. Not sure how much of a difference that will make, but talk to Joe Gibbs racing about how much less power a partially closed throttle body makes.
