gomer124

I'm curious, I've got a D16Z6 and I've adjusted the timing as far as I can, the dist won't turn any further, but it still runs poorly under 2500 RPM, runs great above that. It's got 93 octane and new dist and new fuel pump,NGK wires and air intake.

The ECU has been replaced with a non-vtec ECU from same year civic, the ECU was reprogrammed by Phearable.net to run the VTEC (and he replaced the capacitors)

My question is does the ignition timing map need to be changed?

redm3turbo

I just went through a similar problem--mine turned out to be the 02 sensor (no CEL) either, then again the car was stock, no ECU/reprogramming etc.

NotARaCist

iTrader: (1)

First off, your car doesn't need 93. That's silly and wasteful. Second off, are you adjusting your timing properly, by jumping the service connector and using a timing light, with the engine warmed up, and idle properly set within spec? Third, and finally, why do you have a modified ECU? There's something to the story you aren't telling us.

CandyRedRC46

I think the op is trying to make additional power by advancing the ignition timing and running higher octane fuel to avoid any detonation that could be caused by the earlier spark event. This in itself isn't really silly, but adjusting the ignition by twisting the distributor when you have a chipped ecu that could have the ignition timing advanced in the mapping, is EXTREMELY SILLY.