eg6cx

Alright, so I have a 5-spd 94 cx hatch and I just put a 16v 94' dx head on the block. I have also converted the throttle body and injectors over to dx spec as well. However, I still have the stock CX exhaust mani on the block.

The problem I am having is that when I drive it, I am not getting much power. It struggles to get up into the higher RPMs when in gear. It revs up fine in nuetral, and my tranny is is good shape, but is my problem with the sluggishness my exhaust mani or the injectors or potentially something else?

jbpnoman

Check your mechanical and ignition timing.

98civdx

^ I agree!

mechanical, then check ignition.

eg6cx

I will check both of those! But to add more information into the post, I idles great, however, when gas is applied to drive normally, it bogs down considerably. Ive heard a lot about the DX ecu and its difference in fuel mapping but i thought that was only at HIGH rpms, but at normal rev levels like 3000 or 3500 I dont understand why there is an issue. Should I just swap the ecu for a DX spec ECU?

jbpnoman

Clean idle and bogging on acceleration is a classic "timing off by a hair" problem. Worry about that first, then worry about the ECU.

Are you using CX IM/injectors, or DX IM/injectors?

Arthas

Use the ECU that was made for the head.

HondaPartsHero

^this plus the DX injectors are 240cc and the CX are 180cc so it also could be running rich. With the DX ecu you'll have to convert to a 4 wire 02 unless your CX is already 4 wire.

nealnanoHX

Check the timing and put the CX injectors back in if running the CX ECU./

24TEN

iTrader: (2)

https://sites.google.com/site/24teng...h-16valve-head

In addition, get rid of the CX transmission. From personal experience, the power band shifts towards the higher RPMs but the CX gearing places you just below it with every shift under normal driving conditions. This will result in you flooring it even more than you were before the head swap.