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2002 forester hesitates surges and bucks.


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Hi everyone I'm new here just picked up a 2002 subaru forester in trade. Now I test drove the car a week ago and no issues. Today when I pick it up and bring it home. It runs like crap. It hesitates bad in 1st gear seems like it has not enough fuel. Then it picks up and I shift into 2nd and it bucks and surges. It does this in every gear. When your on the highway it surges and you can see the rpms go up and down as its running. Cel is on I checked it today as I brought it home had code 0301 for every cylinder 1 2 3 4 had a code for bank 1 sensor and also showed a code for a small evaporated leak. Any ideas on what maybe causing this? Please any help and ideas where to start or possibly what is causing this and how to fix it it greatly aappreciate this is now my only transportation and I have a young child and I don't feel it's safe to drive him in this car. Can anyone give me some advice and or help please. Thank you very much!!!

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It did all this on my way home and it was sunny and warm. It sits idea is very rough and low to the point it wants to stall. And when your driving no matter what speeds it surges and backs down almost like it's starving for fuel and it bucks and jerks at times and it does it everyone you run the vehicle

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1 lucky Texan it was filled before I got the car and then ran about half a tank out of it and it was doin it when I got the car I drove it 20 miles home and it did it all the way home I stopped and filled it on my way and it still did it

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No I got it from a private party trade. The one code I remember was the p0301 for each cylinder which is a misfire and it said cylinder 1 and it had a misfire code for each cylinder which I would assume is bad wires and then I remember a reason showing up for a small evaporated leak which I was told could be the gas cap. And then there was something about bank 1 and it running to rich just don't remember the exact codes. I should wrote them down

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Yeah. Start with new plugs and wires. NGK brand is recommended on these cars because they last 4 times longer than most other brands. That may very well solve the issue.

 

PCV, fuel filter are next on the tune up list.

 

If the problem persists, it may time time to look at the fuel pump

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Just want to thank everyone who responded with answers I put new plugs and wires still had issue. So I did I test and unplugged my front o2 sensor and car ran great. So I replaced it which its called the air fuel ration sensor or something similar to that and the car ran just fine. No issues with it no so again I just wanna say thank you to everyone for the quick help and tips on what to look for

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