need help sr misfiring, bad throttle response, etc - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Fender Defender · 10-16-2010, 05:12 PM

a week ago I just cleaned up the wiring on my sr. I just cut the unnecessary harnesses and just made it look cleaner. After that I drove it under boost twice. After that I have problems with bad throttle response like when i press the gas pedal the response is not good. Second of all I notice my temperature is lower than normal while driving. I hear misfiring and it sounds like my motor is jumping alot. Please help!! could it be the sparkplugs? i changed them about a month and a half ago. Could it be my coilpacks? Please help meeee

Edwin562 · 10-16-2010, 05:22 PM

wat exactly did u cut off the harness?

Fender Defender · 10-16-2010, 06:36 PM

i didnt cut anything off the harness I just cut extra harnesses off that I didnt need.

benarovi · 10-17-2010, 10:36 AM

clearly that was the problem since you cut that stuff and then you started having problems... what did you cut? the extra shit on the lower harness? you shouldnt be doin shit like that if you dont know what your doing. prob cut the wrong shit and you cut a wire on the coilpack harness or fuel injector harness part..

Fender Defender · 10-18-2010, 01:49 PM

I didn't cut anything for the coilpack harness and fuel injector parts. Lol I know what these wires are for. I cut the horn since I don't have a horn. I also cut the ones for the ka wiring. If I cut the ones for coilpack and etc then it would barely even start and run stupid. My sr starts good and runs well now after I changed my sparkplugs. I just need a good tune thats prolly it.

eklips3 · 10-18-2010, 03:36 PM

part of your problem is maybe your thermostat is stuck open. this is why you coolant is lower then normal, which leads to you not reaching operating temperature. when the car is not at operating temperature it wont run the greatest.

other then that thats all i can say. i understand you cutting off stuff that you dont need from your harness but you have to be very very careful what you're doing. but since your car still runs , then you didnt fuck up royally.

Fender Defender · 10-18-2010, 06:09 PM

cool cool thanks for the info man. Everythings back to normal now after changing the sparkplugs.

benarovi · 10-18-2010, 06:48 PM

lol u were calling me stoopid? i was just trying to help. did you make a thread about help with changing spark plugs too?

Fender Defender · 10-25-2010, 03:28 AM

lol no i wasn't I said "it'll run stupid" the motor... lol...

10-16-2010, 05:12 PM	#1
Fender Defender Zilvia Junkie Join Date: Feb 2010 Location: Orange County, CA Posts: 497 Trader Rating: (5) Feedback Score: 5 reviews	need help sr misfiring, bad throttle response, etc a week ago I just cleaned up the wiring on my sr. I just cut the unnecessary harnesses and just made it look cleaner. After that I drove it under boost twice. After that I have problems with bad throttle response like when i press the gas pedal the response is not good. Second of all I notice my temperature is lower than normal while driving. I hear misfiring and it sounds like my motor is jumping alot. Please help!! could it be the sparkplugs? i changed them about a month and a half ago. Could it be my coilpacks? Please help meeee

10-18-2010, 03:36 PM	#6
eklips3 Zilvia Addict Join Date: Apr 2008 Location: Calgary Canada Age: 31 Posts: 626 Trader Rating: (3) Feedback Score: 3 reviews	part of your problem is maybe your thermostat is stuck open. this is why you coolant is lower then normal, which leads to you not reaching operating temperature. when the car is not at operating temperature it wont run the greatest. other then that thats all i can say. i understand you cutting off stuff that you dont need from your harness but you have to be very very careful what you're doing. but since your car still runs , then you didnt fuck up royally. __________________ 1992 240sx (RB20. [email protected])

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10-16-2010, 05:22 PM	#2
Edwin562 Post Whore! Join Date: Nov 2009 Location: Whittier (562) Age: 31 Posts: 4,721 Trader Rating: (35) Feedback Score: 35 reviews	wat exactly did u cut off the harness?

10-16-2010, 06:36 PM	#3
Fender Defender Zilvia Junkie Join Date: Feb 2010 Location: Orange County, CA Posts: 497 Trader Rating: (5) Feedback Score: 5 reviews	i didnt cut anything off the harness I just cut extra harnesses off that I didnt need.

10-17-2010, 10:36 AM	#4
benarovi Zilvia Addict Join Date: Jun 2010 Location: FaiL Age: 28 Posts: 913 Trader Rating: (11) Feedback Score: 11 reviews	clearly that was the problem since you cut that stuff and then you started having problems... what did you cut? the extra shit on the lower harness? you shouldnt be doin shit like that if you dont know what your doing. prob cut the wrong shit and you cut a wire on the coilpack harness or fuel injector harness part..

10-18-2010, 01:49 PM	#5
Fender Defender Zilvia Junkie Join Date: Feb 2010 Location: Orange County, CA Posts: 497 Trader Rating: (5) Feedback Score: 5 reviews	I didn't cut anything for the coilpack harness and fuel injector parts. Lol I know what these wires are for. I cut the horn since I don't have a horn. I also cut the ones for the ka wiring. If I cut the ones for coilpack and etc then it would barely even start and run stupid. My sr starts good and runs well now after I changed my sparkplugs. I just need a good tune thats prolly it.

10-18-2010, 06:09 PM	#7
Fender Defender Zilvia Junkie Join Date: Feb 2010 Location: Orange County, CA Posts: 497 Trader Rating: (5) Feedback Score: 5 reviews	cool cool thanks for the info man. Everythings back to normal now after changing the sparkplugs.

10-18-2010, 06:48 PM	#8
benarovi Zilvia Addict Join Date: Jun 2010 Location: FaiL Age: 28 Posts: 913 Trader Rating: (11) Feedback Score: 11 reviews	lol u were calling me stoopid? i was just trying to help. did you make a thread about help with changing spark plugs too?

10-25-2010, 03:28 AM	#9
Fender Defender Zilvia Junkie Join Date: Feb 2010 Location: Orange County, CA Posts: 497 Trader Rating: (5) Feedback Score: 5 reviews	lol no i wasn't I said "it'll run stupid" the motor... lol...