Running Rough After A Ecu And Tune

[noely1]

hey guys i got an ecu and tune to fix my cars power problem (which it didnt fix) my car seems to scream and go no where until my VCT kicks in (around 5.5krpm) my car is non turbo..

so i got HKS FCON Ecu and tune and it has driven fine but it still lags to get to my power for some reason anyway was driving today and parked the car for a good hour or two and went and got in it and the started it up and the car was shaking and really rough sounded like its gonna clonk out and so i gave it a little rev slowly through the rev ranges to about 4krpm and it sounded like a wrx engine ( i know this is a coilpack issue, however it has had new coilpacks put in it in the last few weeks ) so i got my frend to put his hand over the exhaust and everytime i gvae it some revs a splatter of black would be covered on my friends hand??

after bout 4k rpm it would rev out smooth and normally however low revs was really really rough..

so i babied it down the highway back to bris and noticed it was running fine (idled fine and sounded fine) so i pulled over and started off in 1st again and my car was back to its normal sluggish ways but it wasnt running rough at all?? could this be a cold start issue when teh tuner tuned it?? or what could it be?

im taking it back monday anyway to pick ther brains as to what it could of been... luckily i video/recorded the idle when it was bad as proof to show the shop and let them listen

[SlowSkyline]

Changed the sparkplugs?

[blind_elk]

VCT is OFF until about 1500, then switches ON, then turns OFF again at around 4500. If it isn't doing the initial ON, then the tune will be all wrong for the cam timing available.

Edited September 2, 2010 by blind_elk