Hello, I'm new to the HPTuners world and while I have started to read through the mountains of posts, however I am getting really frustrated with the bucking and surging in my goat. It starts easily cold or warm and idles pretty well, although it seems to idle at about 1100 rpm when warm. The most aggravating issue is the bucking I get which is worse when it is cold. It is most pronounced between 1000-2200 rpm although I can feel it lessen as the rpms climb. The bucking is especially bad between 1000-1500 RPMs. If I push the clutch it will immediately stop bucking and the engine drops into a very stable idle. At heavy throttle/wot it smooths out. Have attached my tune file and a log. Any pointers at were to start would be appreciated!
I have 2006 M6 GTO. I have the following mods:
Vararam Intake
LS2 Ported Intake Plenum
JBA Shorty Headers and catted mids
Magnaflow 2.5" Catback
Underdrive Pulley
FTI (Ed Curtis) Streetsweeper Cam - Specs below
Intake Exhaust
Valve Adjustment: .000” .000”
Lobe Lift: .361” .353”
Gross Valve Lift 1.70 Ratio: .614” .600”
Duration @ .050” Tappet Lift: 228* 234*
Lobe Separation: 112*
Recommended Intake Centerline: 109*
Specs at 109 Degree Intake Centerline:
Valve Timing at Open Close
.050” Tappet Lift: Intake: 5* BTDC 43* ABDC
Exhaust: 52* BBDC 2* ATDC