sr20 sputtering while in vacuum

stockevokiller · 07-29-2008, 03:24 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, 03:41 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, 03:10 PM

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

aznrib · 07-29-2008, 03:26 PM

Heavy Throttle

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

*SoguRacing* · 07-29-2008, 03:30 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, 03:24 AM	#1 (permalink)
stockevokiller Join Date: Jul 2006 Location: North Hollywood, ca Age: 24 Posts: 43 Trader Rating: (0)	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, 03:10 PM	#3 (permalink)
stockevokiller Join Date: Jul 2006 Location: North Hollywood, ca Age: 24 Posts: 43 Trader Rating: (0)	What is heavy throttle's number? Is it a shop or a person on the forums? __________________ 1989 240sx, currently under construction.

07-29-2008, 03:30 PM	#5 (permalink)
SoguRacing Legitness! Join Date: Nov 2007 Location: (714) Garden Grove Age: 23 Posts: 2,110 Trader Rating: (7) Rides Gallery: SoguRacing	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. __________________ Leave Me Feedback If You've Bought From Me For Sale Items Services: Parts Install. pm me for details.

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07-29-2008, 03:41 AM	#2 (permalink)
slide180sx Zilvia Member Join Date: Feb 2008 Location: norcal Posts: 200 Trader Rating: (0)	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, 03:26 PM	#4 (permalink)
aznrib Zilvia Member Join Date: Nov 2005 Location: Edison Posts: 194 Trader Rating: (0)	Heavy Throttle Hes more like a store/tech guy. He doesn't do installs anymore.

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