my 1998 honda civic sedan lx d16y7 wont rev past 2500rpms when i put it to the floor.then if i hold it to the floor it slowly idles down to 1200-1500rpms. the code thrown is p1106 which is barometric pressure sensor which is in the ecu and ive tried 3 different ecus. i have good fuel pressure. i changed the dizzy. checked the ecu ground on the thermostat housing and its got me beat trying to figure it out

 

Not sure about why replacing the ECU did not clear code P1106.

But have you checked the mechanical timing?

 

I have not checked the timing but i was told today it might be the wiring harness

 

This sounds like a bad MAP sensor to me. I've had dozens of Civics and Accords with this problem and the problem is usually one of two things; timing belt off or bad MAP sensor. I would pop off the timing cover and move crank to TDC to check the marks and if they're good then I'd move to swapping out the MAP sensor for a known good one. I guess you can swap MAPs first if you have one on hand since it's easier, but I feel strongly that either of those two is the cause.

 

could be a bad injector or injector pulse they might be dirty if it just started ive heard of this happening because of it but mostly on older civics like ef's