Heres the deal I swaped this motor in about 4 weeks ago (d16Z6) and I keep geting a CEL 22.
The thing is, If I leave from a light and run it all the to redline. No CEL but if I'm on the highway and downshift and run up the rpms I get the CEL. at about 4500 or so. Its like if I keep it at high RPMs for a long time it throws the CEL and Vtec drops off.

I'm running a chipped ECU with chrome, 4500 RPM crossover, no rev limiter and 5000 RPM launch control. Ebay OBD1 conversion harries(lots of good reviews and no problems from other people with them. Looks as good or better that more expensive ones).

I've replaces the entire Vtec silinoid unit including the switch and gasket. My screen filter was clogged pretty good. I thought that was it because we took it for a ride and no CEL at all. Last night on the highway it came back. Wiring is good. Oil pressure is there but I cant hook up my oil pressure gauge up until I get a sandwich plate.

I replaces timing belt, water pump, oil pump, did a full tune up, filter and oil. Before I installed the motor. Running 10w30 full senthtic motor oil.

any Ideas what I can check or fix. Its getting really annoying. Thanks

Also I may try to barrow a stock ECU to see if that could be it. Don't think thats it.

 

any ideas?