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if not mistaken the stock ecu for EK9 is PCT

i think there is much parameter for VTEC engagement. But yes you can disable the parameter. -manifold pressure window -rpm window -mininum tps -minimum speed -minimum water temp.

Have you guy seen this

thanks leej8. From reading other HT thread someone said maybe tight valve lash will make AF leaner but the discussion didn't have more info. So we just re tune back and so far no issue.

check o2 sensor mate.

are you using latest SManager software version? Try to reset ecu and load calibration back.

Hi EK9.org Need some opinion are tight valve lash will causing rich a/f ratio. We having wideband road tuning and all seem ok (part tuning 14.7-15 AFR WOT 13 AFR). After 1 week we decided to do valve lash adjustment due to idle not stable. Checked valve lash a bit tight from factory spec...

awesome track monster built.

If not mistake JDM K20 using O2 sensor wideband type. European K20A2 O2 sensor is narrowband. So you cannot run narrowband sensor as PRC ECU will looking O2 sensor wideband voltage.

monster crx. congrats

or check TPS according to manual.

b16a jdm block but head might already change to older model. As for gear box go find roundaboart as jesse said or pull out drive shaft and look inside gear box. If no bar inside gearbox its got LSD.

look stunning mate.

Use O2 sensor that have 4 wire and connect to strayed wire you found.

Maybe your ignition coil bad. Poor contact HT lead at distributor cap always make ignition coil died.

x 2....I already experience car bog down and misfiring sometime and after reset back ECU and upload back calibration the issue solve.

try swap other known good distributor. The sensor inside distributor.

2 port with breather should be OK. 1 port goes to valve cover and another 1 port goes straight to crankcase box (black box). You can ditch out the PCV because PCV need to work with intake manifold vacuum to operate. In my country the little plug/stopper easy to find. Not sure what size it...

One of my friend also have this kind issue. Before done top overhaul the AF ratio OK (3k rpm - 6k 13 AFR) and high rpm 12.5 AFR. After complete doing top overhaul on same dyno after VTEC the AFR going crazy rich (11.0-10.5 AFR). The only thing he change was Ignition Coil and need to turn max...

you might want to look at old one website for porting the inlet..