hi, thought i would pop over as you guys know shed loads more than the vx220 forum
I have a Z20LET VXR220. Mods are CMS remap, new VXR injectors, hybrid vxr220 turbo, NGK iridium "7" plugs (std gap, 6 months old),new courtenay uprated actuator,Helix clutch + lightened fly,new solenoid on turbo,new AMM. It is ****in fast!!! Anyway - my problems...
- when changing gear (1,2,3) @ 2.5 - 3k the revs will occasionally jump 200rpm or hang. If i come off the gas (dont touch clutch/brake), the engine revs hang before you feel the engine goes into overrun. So i doubt it is the clutch switch
- when pressing part throttle and coming off quickly it will occasionally chatter at 2500rpm. Sometimes it is a judder (linked to above??)
- after full bore acceleration (2,3), to 6k, on changing up i get a backfire! (dispack or plugs?)
-It may be my imagination but it sounds like a tractor under load @1000rpm in 5th.
Spoke to courtenay and they will naturally look at it but 360 mile round trip when i could change the DISpack/sensor/actuator first. Got a OBD but no boost guage if that helps
Any thoughts please as the 1st 2 are getting right on my t1ts