sr20 sputtering while in vacuum - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

stockevokiller · 07-29-2008, 02:24 AM

I have searched throughout these forums and have found nothing related to my problem.

I have a s13 with a s13 blacktop. When it is cold in closed loop it runs fine. But as soon as it warms up and gets to open loop it starts to bog and sputter kind of like misfireing. But this only happens sometimes and only while in vacuum. When I hit 0 psi or positive boost(full throttle) the car runs perfect and has all its power and pulls to redline no problem.

What would cause a car to sputter (misfire) but only during vacuum(part-throttle)?

Any help would be greatly appreciated.

Thanks

slide180sx · 07-29-2008, 02:41 AM

Maybe a bad ignitor. Sometimes when the ignitor is going bad it starts to bog. Call heavy throttle describe it..he knows his shit.

stockevokiller · 07-29-2008, 02:10 PM

What is heavy throttle's number? Is it a shop or a person on the forums?

aznrib · 07-29-2008, 02:26 PM

Heavy Throttle

Hes more like a store/tech guy. He doesn't do installs anymore.

SoguRacing · 07-29-2008, 02:30 PM

closed loop referrs to the o2 sensor's signal being adapted into the final afr. i dont think it has to do with that. it might be the coolant temp sensor.

07-29-2008, 02:24 AM	#1
stockevokiller Join Date: Jul 2006 Location: North Hollywood, ca Age: 36 Posts: 43 Trader Rating: (0) Feedback Score: 0 reviews	sr20 sputtering while in vacuum I have searched throughout these forums and have found nothing related to my problem. I have a s13 with a s13 blacktop. When it is cold in closed loop it runs fine. But as soon as it warms up and gets to open loop it starts to bog and sputter kind of like misfireing. But this only happens sometimes and only while in vacuum. When I hit 0 psi or positive boost(full throttle) the car runs perfect and has all its power and pulls to redline no problem. What would cause a car to sputter (misfire) but only during vacuum(part-throttle)? Any help would be greatly appreciated. Thanks __________________ 1989 240sx, currently under construction.

07-29-2008, 02:10 PM	#3
stockevokiller Join Date: Jul 2006 Location: North Hollywood, ca Age: 36 Posts: 43 Trader Rating: (0) Feedback Score: 0 reviews	What is heavy throttle's number? Is it a shop or a person on the forums? __________________ 1989 240sx, currently under construction.

07-29-2008, 02:30 PM	#5
SoguRacing Post Whore! Join Date: Nov 2007 Location: (714) Age: 35 Posts: 2,967 Trader Rating: (23) Rides Gallery: SoguRacing Feedback Score: 23 reviews	closed loop referrs to the o2 sensor's signal being adapted into the final afr. i dont think it has to do with that. it might be the coolant temp sensor. __________________ Pre Tune Checkup! Compression,LeakDown,Vacuum Test $80. Cams Install: $180

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07-29-2008, 02:41 AM	#2
slide180sx Zilvia Member Join Date: Feb 2008 Location: norcal Posts: 199 Trader Rating: (0) Feedback Score: 0 reviews	Maybe a bad ignitor. Sometimes when the ignitor is going bad it starts to bog. Call heavy throttle describe it..he knows his shit.

07-29-2008, 02:26 PM	#4
aznrib Zilvia Member Join Date: Nov 2005 Location: Edison Posts: 248 Trader Rating: (2) Feedback Score: 2 reviews	Heavy Throttle Hes more like a store/tech guy. He doesn't do installs anymore.