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Originally Posted by Nahkapohjola
Check out the p. EC-174, VTC exploded pic:
1. ECU gives VTC advance command:
- the solenoid is activated (gets +12V) and this blocks flow, oil pressure builds up in VTC, system rotates =advances cam. (no advance command while idling).
2. No Advance:
- the solenoid is NOT activated (NO +12V), solenoid remains open and oil pressure escapes via solenoid, no VTC oil pressure buildup, no cam advance.
If click in case 1, only freezing the VTC adv mech helps. Solenoid grounding is balooney. I guess VTC may be opened and something can be fabricated to keep the advance mech in desired position.
If click is in case 2, then blocking, or rewiring solenoid to +12V may hlp.
Note that cam adv pos might have some effect on mpg, so figure out where u want to freeze it.
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If I'm reading this right, grounding the solenoid creates a constant #2 condition, right? It's always open, no advance.
I'm going to try, first, giving the solenoids a constant +12v and see if that helps. If not, I'll try unplugging the solenoids completely. If neither of those help, I'll try blocking off the solenoid. Then I'm looking into the exhaust sprocket idea.