Ignition timing not setting - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

sr vegas 240 · 08-20-2019, 10:38 PM

Trying to adjust timing on the old sr20 im doing this by the FSM stuck on the step where i unplug my TPS rev the engine to 3k 2-3 times (more like 25 times at this point) and rpms never drop to 800 or so it stay more at like 1800. I set the timing at 15* plug the TPS back in and timing drops to -5*. So i tried adjusting it with the TPS pluged in and as i turn the CAS the RPM's go up. My CAS was originally off but i redid it and its spot on now. Is it possible that my idle is adjusted wrong. I've read few other threads with same issue happening but no one ever resolved it or never posted back. Im thinking i need to unplug the TPS and adjust the IACV? Any one know of any other issues that it could be?

08-20-2019, 10:38 PM	#1
sr vegas 240 Zilvia Junkie Join Date: Dec 2013 Location: vegas Age: 36 Posts: 302 Trader Rating: (12) Feedback Score: 12 reviews	Ignition timing not setting Trying to adjust timing on the old sr20 im doing this by the FSM stuck on the step where i unplug my TPS rev the engine to 3k 2-3 times (more like 25 times at this point) and rpms never drop to 800 or so it stay more at like 1800. I set the timing at 15* plug the TPS back in and timing drops to -5*. So i tried adjusting it with the TPS pluged in and as i turn the CAS the RPM's go up. My CAS was originally off but i redid it and its spot on now. Is it possible that my idle is adjusted wrong. I've read few other threads with same issue happening but no one ever resolved it or never posted back. Im thinking i need to unplug the TPS and adjust the IACV? Any one know of any other issues that it could be?