*turbo h22 help with high speed map please

[boostedh22]

ive got a stock bottom end h22 head has skunk 2 valve train and tuner cams ported buttery plate and upper manifold and jdm 345cc injectors its stock other than that i have an s300 ive gone through numerous base maps and have the same problem as soon as i hit the high speed map it looses power and doesnt want to pull a/f is ok its at 12.3 right not wot ive richend it to 11.2 up and it doesnt help it seems better around 12 ive taken timing out and added timing from 20 to 28 it doesnt help either way i did not have this problem untill i put the turbo on its just a 16g home made manifold side mount intercooler im at 4psi boost right now can some one please help me figure this out

[Spunkster]

Check your grounds, especially at the thermostat housing.

[boostedh22]

ill recheck them thanks for posting i didnt take anything loose other than moving the battery to the trunk ill recheck the ground @ the battery

[boostedh22]

k so spunkster if u can help at all, i recheck all grounds i added another ground from the battery to the engine i cant figure this out i pulled the vtec solenoid and housing off and nothing looks wrong there im not getting any error codes , it does it no matter what map i use as soon as vtec comes in it just looses power and does not pull, no mifire or anything just has no pull at all i tuned the low speed map to redline and disabled vtec and it has no issues pulling all threw the rpm band only when i enable vtec it doesnt im loosing my mind here

[Spunkster]

It sounds like the ECU is grounding through the VTEC solenoid and when it engages it can not handle it and the ECU shuts down/revlimits. This is a common problem with grounds.

Try the ECU in a known working vehicle.

[Blwncr1]

I had a issue like this. Turns out I needed to dial the cams to suit boost (reduced overlap). I advanced the exhaust 4 crank degrees and retarded the intake 4 crank degrees too. From there my F20B wanted to make power on the high speed vtec lobe.

[hpmx18]

post a datalog the fuel & ign map need alot of tweaking wats full specs on motor