Question about 1999 Subaru Forester

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Strange intermittent hestitation

Hi guys,

Maybe y'all can help me out a little. I have a 99 subi Forester with 145,000 miles on. Two weeks ago I had the rear right hub assembly replaced and prior to that I have had the right front shaft replaced. I get my car back from the dealer shop I bought it at and now I am getting this strange and unpredictable hesitation when accelerating. If I drive like my grandmother and keep it around 45 it seems to do fine but if I try to drive normally with your general ups and downs in acceleration I get hesitations ranging from slight to severe. Not every time but often enough when I start out it seems very sluggish running through the first two gears and then "Boom" it takes off like a race car and runs beautifully but then if I have to stop it may or may not do it again. Other times I feel I am driving against an extremely forceful headwind that is pushing me back when traveling on the interstate. It hesitates for a period of time and then stops and runs beautifully. What could this be? Fuel pump/filters/tranny/vacuum hoses...what? I don't know where to begin to look and honestly am not sure the guys at the garage will either. They hate to see me come in, they despise my subi and have told me to shoot it and then bury it. I have no flashes on my check engine light. One other note.. when I run my air conditioner, it seems to worsen the problem, actually it is constant if I have air on and not constant if I don't. ??? Can you help?

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  • Anonymous Jun 26, 2008

    Have a 99 Subaru Forester with 18,000 miles. Car had complete turn up 1 year ago or 3000 miles ago. Just started to hesitate intermitantly while excellerating a week ago. Local mechanic (not dealer) couldn't duplicate problem but checked all filters and hoses and said the seemed like new. Any sugestions



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Also try checking knock sensor this will cause same hesitation due to timing issues

Posted on Jul 19, 2008

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You know many things will cause this problem, but i recomend you to start with the cranshaft position sensor have it replace and look for some ignition coils may be use coils will be fine
but when a vehicle does not have spark plugs serviced a least every 30000 miles then the current coming from coils start taking plug wires and then the coils because there is a lot of power coming fron the coils it is between 12 to 50k volts
any way try first the crank sensor like i told you and let me know

Posted on Jun 08, 2008


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