Timing Getting Retarted Into Negative - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

nighthawklude99 · 01-06-2008, 03:09 PM

Ok so I have been trying to figuere out why my car runs like crap sometimes, but for the most part it runs great. The problem is that sometimes, and its never predictable always just at random times it will bogg and cause a huge loos in power. I alwayse thought it was because it was retarding the timing and finaly tonight I had my data logging laptop hooked up and was logging when the problem occured. When i get into any kind of boost, decel, and sometimes right when i got on it (then it would quit and run really strong, others it would continue to bog) it would pull timing all the way down to -14 at times but usualy -5 to -10. The tricky thing is that it only happens sometimes, not all the time and its never predictable. It also seems like it does it when its extreme hot (hotest days of the summer) or extreme cold (night like tonight mid to high 20's) this has been the first time it has done it since the hot summer days. What do you think could be causing this, my thoughts are knock sensor or mass. Does anyone know how I can logg knock to see if this is it? Timing is dead on 15 btc. Its really annoying, it makes my car non consistant and i cant stand that.

Thanks Jason

Car is a 1989 240sx hach w/ red top sr20det, front mount, 2.5 cold pipes, 3 hot pipes, apexi avc-r, tomei ecu(had stock sr ecu and did the same problem) 3 down pipe, 3 exhaust cutout.

01-06-2008, 03:09 PM	#1
nighthawklude99 Join Date: Oct 2006 Location: North Carolina Age: 39 Posts: 25 Trader Rating: (0) Feedback Score: 0 reviews	Timing Getting Retarted Into Negative Ok so I have been trying to figuere out why my car runs like crap sometimes, but for the most part it runs great. The problem is that sometimes, and its never predictable always just at random times it will bogg and cause a huge loos in power. I alwayse thought it was because it was retarding the timing and finaly tonight I had my data logging laptop hooked up and was logging when the problem occured. When i get into any kind of boost, decel, and sometimes right when i got on it (then it would quit and run really strong, others it would continue to bog) it would pull timing all the way down to -14 at times but usualy -5 to -10. The tricky thing is that it only happens sometimes, not all the time and its never predictable. It also seems like it does it when its extreme hot (hotest days of the summer) or extreme cold (night like tonight mid to high 20's) this has been the first time it has done it since the hot summer days. What do you think could be causing this, my thoughts are knock sensor or mass. Does anyone know how I can logg knock to see if this is it? Timing is dead on 15 btc. Its really annoying, it makes my car non consistant and i cant stand that. Thanks Jason Car is a 1989 240sx hach w/ red top sr20det, front mount, 2.5 cold pipes, 3 hot pipes, apexi avc-r, tomei ecu(had stock sr ecu and did the same problem) 3 down pipe, 3 exhaust cutout.