mau709394 Posted February 11, 2009 Share Posted February 11, 2009 G'day to anyone that can provide me with some explanation. I have a Legacy B4 yr2000. every morning i give the car a good 5-10min warm up. But if i don't warm up the car as in my engine. my car seems to bunny hop at first and second gear and if say the car is park and engine off for an hour or so. This will also create a bunny hop situation at first and second gear for a short period of time. Has anyone experience this problem? and does anyone thing this is a Temperature sensor problem or a O2 sensor problem? sorry for the really brief explanation as this is my first topic post. any suggestion or help will be gladly appreciated. I'm planning to take it into Subaru to get it check out. Cheers Link to comment Share on other sites More sharing options...
jonklein611 Posted February 11, 2009 Share Posted February 11, 2009 AT or MT? Link to comment Share on other sites More sharing options...
mau709394 Posted February 12, 2009 Author Share Posted February 12, 2009 MT. thanks for the feedback Link to comment Share on other sites More sharing options...
jonklein611 Posted February 12, 2009 Share Posted February 12, 2009 Does the gauge ever make it standard operating temperatures? Link to comment Share on other sites More sharing options...
mau709394 Posted February 13, 2009 Author Share Posted February 13, 2009 Hi guys.thanks for the feedback.MY car is MT transmission and it does reach it normal temperature.Basically there is lack of power and will bunny hope at first gear and second gear when the engine temp is cold. Link to comment Share on other sites More sharing options...
KnifeyMcShanker Posted February 14, 2009 Share Posted February 14, 2009 Do you have any intake mods? Messing with the stock airbox can make it jumpy at low speed/revs. Link to comment Share on other sites More sharing options...
ultimakf7 Posted February 14, 2009 Share Posted February 14, 2009 rough idle? kids jumping in the back seat? live bodies in the trunk? Link to comment Share on other sites More sharing options...
987687 Posted February 14, 2009 Share Posted February 14, 2009 Possibly because when the engine is cold it will idle around 1500 RPM. So when you are going slow in first gear you will be pulling it below 1500RPM... On that note, my '99 outback is always jumpy like you described at low speeds. Even when it is warmed up. But not so much. It also occasionally has a bit of a stutter during idle. I have been thinking injectors for a while, but being my second car, I haven't looked into it much. Link to comment Share on other sites More sharing options...
mau709394 Posted February 15, 2009 Author Share Posted February 15, 2009 yea seems like you experiencing the same problem as me. It bothers me to a certain extent but as soon as the car is warm up. All those problem goes away. I'm thinking it also might be the injector. Would the spark plugs/leads play apart to this problem? Link to comment Share on other sites More sharing options...
987687 Posted February 15, 2009 Share Posted February 15, 2009 Maybe, maybe not. But if they haven't been replaced in a while it is time to do it anyway. (have fun doing them in a 2.5...). Also, as someone recommended replace your air filter. I got a washable one and cleaned my MAF. All on my legacy, I have yet to give some love to my outback... Link to comment Share on other sites More sharing options...
jonklein611 Posted February 15, 2009 Share Posted February 15, 2009 change plugs too. Link to comment Share on other sites More sharing options...
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