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Old 01-21-2002, 04:41 PM   #1
WRxednEffect
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Default weird problem with throtttle sticking

k how to explain, under normal driving its fine. The minute i am half wot or full wot it sticks. this is the scenario.

driving: press gas down untill shift point, shift with foot off throttle. but at this point the rpms jump 500 or 1000rpms up. then back on gas and noraml. when i press teh gas with no gear in or load its fine. but when the car has load it jumps rpms after a shift out of gear


really weird, i have my boost line tied to the throttle cable down south. weird. but its not tight enough to restrict ti. uness the engine is moving or sumint
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Last edited by WRxednEffect; 01-21-2002 at 05:18 PM.
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Old 01-21-2002, 05:13 PM   #2
Force[FED]
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I have noticed this, too. Accelerate easily (or even half throttle) in a gear, let off gas, press clutch, and the rpms either stay up or actually climb some while shifting. Almost feels like a slipping clutch, or super heavy flywheel...but it doesn't happen all the time, some days it doesn't happen at all. Something is definitely not right, just not sure what it is?

Anyone else have this sporadically and figure out what it was?

Kevin
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Old 01-21-2002, 05:17 PM   #3
WRxednEffect
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this is weird, i called my suby dealer and he said that its kinda normal with subarus. SEems like all these weird hickups are "normal" **** man i should of bought an evo but i cant. I can deal cause I really love this car
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Old 01-21-2002, 05:20 PM   #4
WRX Power
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Guys this is normal w/ turbo cars.... and even some N/A cars.

Do a search, there is a thread that discussed this!

Bryan
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Old 01-21-2002, 07:07 PM   #5
larryg
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Mine does it too and it drives me nuts (short drive...). Anyway, it only happens under part throttle acceleration. It doesn't do it when I am driving hard so I am not worried about over-reving it.
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Old 01-21-2002, 07:20 PM   #6
WRxednEffect
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ya think for 42g's canadian this wouldnt happen
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Old 01-21-2002, 07:22 PM   #7
mitch808
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This is a emmisions feature, some sort of purge valve that is in place that makes the RPM's jump inbetween shifts. Do not worry about it.
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Old 01-21-2002, 07:24 PM   #8
Imprezer
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Suby engines drink a lot of oil. Try taking the IC and look how much oil is in there. Now the TB sits at an angle and all that oil drains into the manifold. All that oil gathers by the butterfly plate and eventually builds up to a point so that at idle the TB passage becomes blocked with oil build-up or almost blocked and the butterfly gets sucked in by the vacuum when you let off the gas pedal.

The solution?

1. Take the TB off and clean it.
2. Up your idle screw a bit (if you dont want to do #3)
3. Install oil catch can.

Hope this helps.

-Alex
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Old 01-21-2002, 08:02 PM   #9
WRxednEffect
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i have a god damn oil catch can, but i dont know how to install the ****er!!!!!! and all the faq's arent helping caues they arent detailed enough
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Old 01-21-2002, 08:50 PM   #10
nhluhr
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Default Re: weird problem with throtttle sticking

Quote:
Originally posted by WRxednEffect
driving: press gas down untill shift point, shift with foot off throttle. but at this point the rpms jump 500 or 1000rpms up. then back on gas and noraml. when i press teh gas with no gear in or load its fine. but when the car has load it jumps rpms after a shift out of gear
This is normal for turbocharged, intercooled engines. All the air that your turbo is compressing when your throttle is half to wide open is being pushed into the intercool before the engine. The intercooler, being very big is going to "store" lots of air. This is the reason intercoolers cause lag and bigger intercoolers cause more lag. Anyway, all this pressurized air continues to flow through the system and expand to normal volumes after you close the throttle. This is manifested by the engine burning fuel to match the air. This, of course, causes the rpms to rise if it's out of gear.
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Old 01-21-2002, 09:12 PM   #11
mr2guru
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Hmmm I noticed this also. My SVT contour did the exact same thing. The people at Contour.org called it "throttle hang" Between shifts the throttle would not drop for a very brief period or sometimes even jump a little. All while your foot was off the gas and your pushing in the clutch to shift. Very annoying. They had a fix which I don't know if it would be applicable in our cars. Had something to do with inserting a copper plug with a 7/32" or similar size hole drilled in it, into a hose somewhere on the emissions equipment. (sorry that's all I remember ) Anyway, It (throttle hang) is built into the car on purpose for emission reasons. It is supposed to be there. Just annoying.

cheers
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Old 01-22-2002, 12:49 AM   #12
cronic
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it also happens to me. i hate it!
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