stuttering at 6000 rpms

[adrian2627]

Yup, when i rev my car (no load) it will kinda hesitate/stutter at about 6000 rpms up to 6900. But other rpms are ok. Plugs are new, plugs are magnecore, everything good, just had oil change. i have an afc to tune my ecu, 16g, 3 inch tbe, injen intake, greddy ebc, greddy gauges (boost, egt, a/f) also, when at idle, it sounds like it has cams or something, i mean the idle isnt smooth. what could it be? thanks guys

 

[GVR4592]

Have you done a boost leak test? What plugs are you using and what is the gap? What are your SAFC settings? Do you have injectors or a larger fuel pump?

 

[adrian2627]

i have a larger fuel pump, the thing is i bought this car from a guy and he doesnt know anything about the car. Rich dude, so all he did was drive the car and be content. know that i have it im slowly learning whats been installed. So far i know that it has a larger fuel pump, safc, e3b16g, fmic, greddy type rs bov, , 6 puck clutch, shep tranny, all 60k maintenance done (water pump, all belts, seals, and gaskets), egt gauge, boost gauge, a/f gauge, greddy EBC. stock block and head. I dont know about injectors if they are aftermarket or not. The settings on my AFC are as follows: LFTS - 3000 to 7200 is +3 accross, hfts - 3000 to 4800 is +3, 5000 to 5400 is +4, 5800 to 6800 is +19, then 7000 to 7600 is +9. I will hit fuel cut at about 4500 - 5000 at 16-17psi.

 

[adrian2627]

-i havent performed a boostleak test yet, plugs are ngk bpres6, using penzoil platinum syntetic 10-30, im about to do a clutch job sunday coz i hate the way the 6 puck grabs, i will do the tests then see what i get. also already did a compression test 163 +/- 3 psi accross. The guy said he already had it leakdown tested. oil pressure is good, no smoking whatsoever, doesnt pull that strong compred to my gst when i had 560cc and stage 3 keydiver. i know something is wrong with the settings or the car just dont know what and where. also he gave me the dyno sheets for it, its pulled 297hp and 289tq at 17psi.

 

[adrian2627]

nobody???