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Old 01-23-2002, 02:24 PM   #1
outback bosco
Scooby Newbie
Member#: 12075
Join Date: Nov 2001
Location: Garage, messing w/the XTs
2K OBS blue/silver
Lobotomized 86 & 87 XT

Default engine sputtering at High Rev full throttle app.

I was driving last night and my engine started to sputter when accelerated w/full throttle app i hit around 75-80mph at about 4.5-5k rpm. But with normal driving it was fine. The sputtering noise sounds like a series of misfired.

I have an intake and free flow muffler. No other engine mods.
The only thing that was different last night was that it was colder than usual. Could it be that there is too much oxygen going in and that is causing the misfire or detonation.

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Old 01-23-2002, 04:03 PM   #2
Scooby Newbie
Member#: 6436
Join Date: May 2001
Location: Holland, PA
1998 Impreza 2.5RS

Default ignition

It's most likely ignition related. Check your spark plugs and ignition wires. If you have Champions in there, change them to NGK.
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Old 01-25-2002, 12:11 AM   #3
Scooby Newbie
Member#: 14398
Join Date: Jan 2002
Location: Chicago..Me love you long time
2003 White Wag Wrx
Stage Dos


Check the plugs to see what color they are. My guess is that you might be running lean. Too much air, not enough fuel . . . .

By the way, did you reset your ECU when you put on your intake/exhaust?
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Old 01-26-2002, 11:17 PM   #4
Scooby Newbie
Member#: 14672
Join Date: Jan 2002
Location: south louisiana
2002 impreza wrx
midnight pearl black

Default engine sputtering at high rev

i hope i can save you the time and headaches i suffered when my wrx had the same problem your describing.after a month at the dealership they found my pre-cat had become clogged with some sort of contaminate(it was an orange gooey substance).they changed the pre-cat and drained and cleaned the fuel tank, the hoses on the back of my intercooler had cracks in them as well apparently from overtightening the hose clamps that held them on.hope this helps you get your subie back in action.....

p.s. if you have any mods short of a rear muffler upgrade return the car to stock even if you just have a k&n airfilter the warranty guys at soa are verrry strict on any mods. peace wrxtcy
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