Stock KA24DE Randomly Running Rich... - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

AadosX · 03-04-2005, 12:31 AM

My car has the stock KA24DE in it with and intake, removed emissions crap, and side exit exhaust (no cat, no muffler, nothing).

The exhaust has been on the car for about a month now with no problems. Usually I drive like a woman... shifting by 3k. Well lately I've been driving much more heavily, autocross, drag strip once, etc. Even around on the street I'm known to get on it some times.

Anyways, the other day my car randomly decided to start running rich, or at least it seems. At idle the car shakes but RPM's are the same... almost like a loping from cams. It also shakes more when accelerating. There's a noticable loss of power, and when I get on it, or just take it easy, the exhaust sounds different. If I go WOT and push in clutch to shift it backfires like crazy (more than normal hehe). It did this for about 10 minutes then went back to normal. I drove for another 30 minutes and it started again. This time it continued for a few hours until I stopped driving for the day. Today when I turned the car on it seemed fine for my 2 minute trip down the road... but it was still warming up. A few minutes after that trip I drove some and it was rich again. It was like that the few times I drove all day, but then randomly went back to normal on my way home tonight. I was actually on throttle when it happened too, and there was an obvious bump in power, exhaust note change, and smoothening out of everything.

Any ideas?

Thanks!
John

03-04-2005, 12:31 AM	#1
AadosX Zilvia Addict Join Date: Dec 2003 Location: Auburn University Posts: 959 Trader Rating: (0) Feedback Score: 0 reviews	Stock KA24DE Randomly Running Rich... My car has the stock KA24DE in it with and intake, removed emissions crap, and side exit exhaust (no cat, no muffler, nothing). The exhaust has been on the car for about a month now with no problems. Usually I drive like a woman... shifting by 3k. Well lately I've been driving much more heavily, autocross, drag strip once, etc. Even around on the street I'm known to get on it some times. Anyways, the other day my car randomly decided to start running rich, or at least it seems. At idle the car shakes but RPM's are the same... almost like a loping from cams. It also shakes more when accelerating. There's a noticable loss of power, and when I get on it, or just take it easy, the exhaust sounds different. If I go WOT and push in clutch to shift it backfires like crazy (more than normal hehe). It did this for about 10 minutes then went back to normal. I drove for another 30 minutes and it started again. This time it continued for a few hours until I stopped driving for the day. Today when I turned the car on it seemed fine for my 2 minute trip down the road... but it was still warming up. A few minutes after that trip I drove some and it was rich again. It was like that the few times I drove all day, but then randomly went back to normal on my way home tonight. I was actually on throttle when it happened too, and there was an obvious bump in power, exhaust note change, and smoothening out of everything. Any ideas? Thanks! John