sr timing issue - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

KoukiMonsta · 01-31-2010, 02:50 PM

ok guys so my car started to run a bit poorly. redtop w/ injectors, s15 bb, FMIC, FPR, 255 pump etc....

so i checked tps....in spec. so then i check timing. it was way off past 20* like a couple inches!!!!! when i adjusted the CAS w/ tps unplugged it wont even run at 15* BTDC. could my cas be off a tooth? what would cause this. right now its actually running pretty well....and thats with timng way off

steve shadows · 01-31-2010, 02:54 PM

I have seen this more and more lately. I think it's just a symptom of a dyning CAS or a bad CAS. You could try re-punching it although in my expreience this usually doesnt help.

What I often do on these cases, suggest a new CAS. Or if you have a power fc or an adjustable EMS which you can manually control the timing map you could try adjusting this and scaling it - x degrees based on where your starting place is. I have had to do this on a couple cars because of the horrible synch on the trashed cas.

KoukiMonsta · 01-31-2010, 04:29 PM

Quote:

Originally Posted by steve shadows

I have seen this more and more lately. I think it's just a symptom of a dyning CAS or a bad CAS. You could try re-punching it although in my expreience this usually doesnt help.

What I often do on these cases, suggest a new CAS. Or if you have a power fc or an adjustable EMS which you can manually control the timing map you could try adjusting this and scaling it - x degrees based on where your starting place is. I have had to do this on a couple cars because of the horrible synch on the trashed cas.

i have enthalpy so cant do that,,

will look into a new CAS

01-31-2010, 02:50 PM	#1
KoukiMonsta Nissanaholic! Join Date: Mar 2009 Location: NC Posts: 1,969 Trader Rating: (23) Feedback Score: 23 reviews	sr timing issue ok guys so my car started to run a bit poorly. redtop w/ injectors, s15 bb, FMIC, FPR, 255 pump etc.... so i checked tps....in spec. so then i check timing. it was way off past 20* like a couple inches!!!!! when i adjusted the CAS w/ tps unplugged it wont even run at 15* BTDC. could my cas be off a tooth? what would cause this. right now its actually running pretty well....and thats with timng way off __________________ @UpshiftEngineering

01-31-2010, 02:54 PM	#2
steve shadows Post Whore! Join Date: Aug 2003 Location: LA and OC Posts: 8,202 Trader Rating: (5) Feedback Score: 5 reviews	I have seen this more and more lately. I think it's just a symptom of a dyning CAS or a bad CAS. You could try re-punching it although in my expreience this usually doesnt help. What I often do on these cases, suggest a new CAS. Or if you have a power fc or an adjustable EMS which you can manually control the timing map you could try adjusting this and scaling it - x degrees based on where your starting place is. I have had to do this on a couple cars because of the horrible synch on the trashed cas. __________________ Like Me on FaceBook !

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