The curse of the AsianDM motor. B16a4

[KB]

engine = ADM b16a4
wiring = ADM b16a4 EK4 harness
ecu = ADM B16a4 ECU

All from halfcut.

Symtoms as follows.....


Reset ECU
Car runs perfect except no VTEC. (No codes)
Jump Service connector
VTEC works but cuts in and out from 5800 to redline. (Now im throwing 20 and 23, knock and ELD)
Disconnect Service Connector
Still throwing codes 20,23. VTEC works great but after about 30mins of driving the car starts to randomly begin to misfire, bogging down, stuttering under WOT at low rpms. After more time has passed begins to stutter more but in all rpms. After even more time. Car is only barley drivable with stuttering, missfiring and bogging down if anymore than 10% throttle is given.


FROM MY CONCLUSIONS I HAVE FOUND...
- VTEC only works if the MIL is on(throwing a code)
- Once VTEC starts working over time performence starts to go.
- Misfiring, stuttering sounds like ignition but what would cause the igniton to fail over time? ie one minute the car is driving well enoguh to chop a B16a2 with I/H/E, then 20mins later cant use hardley any throttle or it will bog down(simular to if you have your ignition timing fully advanced)
-Almost feels like pre-igniton.

ANY IDEAS?



PS can anyone do custom chips in Perth? Need an Open Loop only chip with ELD and KNOCK Disabled.

[Weq]

new vtec solenpoid and pressure switch would be my best guess. ive got one if u need it.

[ECU-MAN]

check your oil presure, ( save your self alot of time )

[VT3C]

what about Dizzy ? it is like missfiring at low-load cruising and under throttle.

seems to me like detonation but cannot confirm.

KB explain your modifications to the Distributor.. is using D-series coil etc.

I doubt vtec solenoid needs replacing Weq.. maybe the Grounds for the PGMFI and VTEC solenoid are dodgy.. but I still think it's dizzy / points related.

KB have you checked your OIL level yet ? though didnt seem to be blowwing any smoooke out exhaust.. hrm..

[Weq]

a dizzy will not throw a ufking 22 & 23. Its either ur ecu/wireing or ur vtec solenoid is stueed. (im assuming good pressure ecu-man). and 'tricking' ur car to run vtec is a bad bad thing. if it is truely bad oil pressure u can say goodbuy to ur bearings in no time.

[KB]

weq can i use the solenoid off my D16y8?

[Thresher]

just got new code

21 VTEC spool solenoid valve

is that the solenoid itself needs replacing?

[Thresher]

^^^ This Is Kb Using Threshor Account

[VT3C]

a dizzy will not throw a ufking 22 & 23. Its either ur ecu/wireing or ur vtec solenoid is stueed. (im assuming good pressure ecu-man). and 'tricking' ur car to run vtec is a bad bad thing. if it is truely bad oil pressure u can say goodbuy to ur bearings in no time.

I didnt say the dizzy would trow a FKUCKING code 22 + 23 so calm the FKUCK down !!!

KB hasnt mentioned his hybrid dizzy setup and it may be relevant - there's more problems driving the car a lot worse than no vtec !!

'sake Weq...

[Weq]

KB, no. the y8 solenoid is unique to the y8, for some dumb reason. the y1 solenoid is compatible with any vtec head, except of course the y8.

vtec: sorry im getting my wires confused. it sounded like u were blaming the codes on the dizzy. no way thought would happens.

As for the coil differences, im pretty sure the internals swap wont hurt anything. but to elimate it, try another dizzy if u have access.

[KB]

how can one test the solenoid?

[ECU-MAN]

measure its resistance

from memory it should be with in 14 to 17ohm

remove the spool housing, apply compressed air to the solenoid, apply 12v to the solenoid, you should see the valve move and the air bleed through.