KA24DE power problem - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

nissandr1ft · 04-09-2006, 04:12 PM

To start off I've had 240's since about 98, and I know how my last ones have run. I've had this current 92 coupe since about December, and its been a piece of junk. The car was originally titled in Cali, so it has all the Cali emission options. The motor surges and stutters when I'm driving....below 4k it really lacks power, above 4k it starts building power, and 5500 on it runs like it should. Its like it comes in stages that are very noticeable. When your in neutral just revving it the cars stutters then catches and revs. Ive tried replacing nearly everything off a motor that runs well, or get it new. So far I've replaced the plugs, wires, cap, rotor button, fuel filter, and O2 sensor. Ive swapped over a different coil, distributer, coolent temp sensor, MAFS, fuel pump, and the ECU. The EGR is blocked, and the evaporative emissions is gone. The ECU I tried wasnt a Cali model, and they seem to run about the same. I've checked the codes with the cali ECU and it gave me a (14) speed sensor, (32) EGR, and (34) Detonation circuit. The EGR light was on with it connected and seems to run better lugged. The speed sensor is probably due to the digital dah only coming on randomly, because I checked it via the FSM procedure and it's fine. I've been wondering if its the knock sensor because that would make sense that the ECU is pulling timing and itd be runnin like this. I tried jumping the knock sensor plug to see if that helped or leave it unplugged. Anyone have any similer symptoms that theyve fixed? Any ideas on what to check.

Steven

04-09-2006, 04:12 PM	#1
nissandr1ft Zilvia Member Join Date: Sep 2004 Location: Clayton, NC Age: 41 Posts: 284 Trader Rating: (0) Feedback Score: 0 reviews	KA24DE power problem To start off I've had 240's since about 98, and I know how my last ones have run. I've had this current 92 coupe since about December, and its been a piece of junk. The car was originally titled in Cali, so it has all the Cali emission options. The motor surges and stutters when I'm driving....below 4k it really lacks power, above 4k it starts building power, and 5500 on it runs like it should. Its like it comes in stages that are very noticeable. When your in neutral just revving it the cars stutters then catches and revs. Ive tried replacing nearly everything off a motor that runs well, or get it new. So far I've replaced the plugs, wires, cap, rotor button, fuel filter, and O2 sensor. Ive swapped over a different coil, distributer, coolent temp sensor, MAFS, fuel pump, and the ECU. The EGR is blocked, and the evaporative emissions is gone. The ECU I tried wasnt a Cali model, and they seem to run about the same. I've checked the codes with the cali ECU and it gave me a (14) speed sensor, (32) EGR, and (34) Detonation circuit. The EGR light was on with it connected and seems to run better lugged. The speed sensor is probably due to the digital dah only coming on randomly, because I checked it via the FSM procedure and it's fine. I've been wondering if its the knock sensor because that would make sense that the ECU is pulling timing and itd be runnin like this. I tried jumping the knock sensor plug to see if that helped or leave it unplugged. Anyone have any similer symptoms that theyve fixed? Any ideas on what to check. Steven __________________ ------------------------- www.carolinanissans.com -------------------------