95 s14 help - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

drift240_2009 · 10-07-2010, 08:47 AM

Ok guys i need some help with this. My zenki has 157k miles on it and i have replaced alot of parts including BMC,spark plugs,all sensors etc. The problem is is that the engine light comes on and tells me that the BMC is malfunctioning when its braking like it should whether the light is on or off, The 02s are bad and cylinders are blown. Now i did a CT and it has good compression for all cylinders. So anyways i just recently got it cleared of all codes and the light went off and this was 3 weeks ago. Now the lights back on and its the EXACT same codes. What am i suppose to do,replace the new parts with new parts again or pull the light bulb out?

drift240_2009 · 10-07-2010, 11:03 AM

Someone help with my car.

LigouriRd · 10-07-2010, 11:28 AM

There is no code for a brake master cylinder malfunction. Please list out what codes you are getting.

drift240_2009 · 10-07-2010, 11:37 AM

Mass Air Flow Sensor----------12--------EC-92
IACV-AAC Valve---------------25-------EC-110
EGR System-------------------32-------EC-117
Front O2 Sensor---------------33-------EC-125
Knock Sensor------------------34-------EC-130
CYL 4 Misfire------------------65-------EC-150
Rear O2 Sensor----------------77------EC-162
Crank Position Sensor (OBD)----82------EC-167

This is what it shows after i installed all these were replaced.

drift240_2009 · 10-07-2010, 01:24 PM

So tell me guys, whats wrong with the car

LigouriRd · 10-07-2010, 01:37 PM

A lot.

The fact that you are still having problems with all of those even after replacing all of those components leads me to think that something is wrong with the wiring. It could even be that a few pins are bent at the ecu.

I would go though the electrical diagnoses detailed in the factory servise manual until you find the source of the problem.

MANOlOS14 · 10-07-2010, 02:00 PM

me personally. i would go back and re-check all the parts i replaced. Specially when it comes down to sensitive parts like sensors and stuff. have ur scanner clear out the codes, wen about to start the car, switch the key to "ON" wait 3 seconds (this will get all the systems ready to start the car) and then start it see if u get the same problems. LMK

drift240_2009 · 10-07-2010, 04:20 PM

Thanks guys. but Its all be checked by a mechanic today and everything is in working condition, plus he did the wiring for everything with new wires and the codes came back.

Mangudai · 10-07-2010, 04:57 PM

Wouldn't tracing the wiring for those sensors to see if something is shorted out make sense? Just because he did the wiring doesn't mean he did it right.

drift240_2009 · 10-07-2010, 08:24 PM

True but we checked it 3 times and still cant find shorts

10-07-2010, 08:47 AM	#1
drift240_2009 Zilvia Junkie Join Date: Oct 2009 Location: suwanee,ga Age: 37 Posts: 386 Trader Rating: (0) Feedback Score: 0 reviews	95 s14 help Ok guys i need some help with this. My zenki has 157k miles on it and i have replaced alot of parts including BMC,spark plugs,all sensors etc. The problem is is that the engine light comes on and tells me that the BMC is malfunctioning when its braking like it should whether the light is on or off, The 02s are bad and cylinders are blown. Now i did a CT and it has good compression for all cylinders. So anyways i just recently got it cleared of all codes and the light went off and this was 3 weeks ago. Now the lights back on and its the EXACT same codes. What am i suppose to do,replace the new parts with new parts again or pull the light bulb out?

10-07-2010, 11:28 AM	#3
LigouriRd Zilvia Member Join Date: Sep 2003 Location: Edgerton Wi. Age: 46 Posts: 204 Trader Rating: (1) Feedback Score: 1 reviews	There is no code for a brake master cylinder malfunction. Please list out what codes you are getting. __________________ '96 Nissan 240SX KA-T ─ '05 Grand Cherokee Laredo 4x2─'85 Nighthawk

10-07-2010, 01:37 PM	#6
LigouriRd Zilvia Member Join Date: Sep 2003 Location: Edgerton Wi. Age: 46 Posts: 204 Trader Rating: (1) Feedback Score: 1 reviews	A lot. The fact that you are still having problems with all of those even after replacing all of those components leads me to think that something is wrong with the wiring. It could even be that a few pins are bent at the ecu. I would go though the electrical diagnoses detailed in the factory servise manual until you find the source of the problem. __________________ '96 Nissan 240SX KA-T ─ '05 Grand Cherokee Laredo 4x2─'85 Nighthawk

10-07-2010, 04:57 PM	#9
Mangudai Zilvia Addict Join Date: Jan 2007 Location: South Posts: 656 Trader Rating: (0) Feedback Score: 0 reviews	Wouldn't tracing the wiring for those sensors to see if something is shorted out make sense? Just because he did the wiring doesn't mean he did it right. __________________ Almost there.

10-07-2010, 11:03 AM	#2
drift240_2009 Zilvia Junkie Join Date: Oct 2009 Location: suwanee,ga Age: 37 Posts: 386 Trader Rating: (0) Feedback Score: 0 reviews	Someone help with my car.

10-07-2010, 11:37 AM	#4
drift240_2009 Zilvia Junkie Join Date: Oct 2009 Location: suwanee,ga Age: 37 Posts: 386 Trader Rating: (0) Feedback Score: 0 reviews	Mass Air Flow Sensor----------12--------EC-92 IACV-AAC Valve---------------25-------EC-110 EGR System-------------------32-------EC-117 Front O2 Sensor---------------33-------EC-125 Knock Sensor------------------34-------EC-130 CYL 4 Misfire------------------65-------EC-150 Rear O2 Sensor----------------77------EC-162 Crank Position Sensor (OBD)----82------EC-167 This is what it shows after i installed all these were replaced.

10-07-2010, 01:24 PM	#5
drift240_2009 Zilvia Junkie Join Date: Oct 2009 Location: suwanee,ga Age: 37 Posts: 386 Trader Rating: (0) Feedback Score: 0 reviews	So tell me guys, whats wrong with the car

10-07-2010, 02:00 PM	#7
MANOlOS14 Leaky Injector Join Date: Feb 2010 Location: Newbury Park Age: 33 Posts: 113 Trader Rating: (0) Feedback Score: 0 reviews	me personally. i would go back and re-check all the parts i replaced. Specially when it comes down to sensitive parts like sensors and stuff. have ur scanner clear out the codes, wen about to start the car, switch the key to "ON" wait 3 seconds (this will get all the systems ready to start the car) and then start it see if u get the same problems. LMK

10-07-2010, 04:20 PM	#8
drift240_2009 Zilvia Junkie Join Date: Oct 2009 Location: suwanee,ga Age: 37 Posts: 386 Trader Rating: (0) Feedback Score: 0 reviews	Thanks guys. but Its all be checked by a mechanic today and everything is in working condition, plus he did the wiring for everything with new wires and the codes came back.

10-07-2010, 08:24 PM	#10
drift240_2009 Zilvia Junkie Join Date: Oct 2009 Location: suwanee,ga Age: 37 Posts: 386 Trader Rating: (0) Feedback Score: 0 reviews	True but we checked it 3 times and still cant find shorts