Acceleration problems I have a '98 Subaru Legacy Brighton w/ 320,000 miles. The car seems to stall out between 20-30 mph when accelerating with high rpms, although it doesn't kill. The tranny fluid looks good, and I just had the Mass Air Flow sensor replaced. At highway speeds it's OK, but when I slow to a stop the same 20-30 mph problem occurs. What to do?

SOURCE: subaru vibration

I had similar problem with my '99 outback. Replaced the front half shafts and seemed much better. A few months later seemed to be comming back so replaced the driver side shaft again and the problem disappeared. I had put in rebuilt shafts and the driver side shaft was not rebuilt correctly.

SOURCE: car lurches and bucks, rpms erratic on acceleration on hills

You could have any of these problems:
1) vacuum leak- broken air hose or disconnected air hose.
2) water in the gasoline- add a water remover to you gas tank.
3) bad or disconnected spark plug wire(s).
If this were my Forester, I'd take it to a mechanic who has a electronic engine tester..

Mike Butler

• 6674 Answers
• Posted on Aug 23, 2009

SOURCE: 2004 subaru forester, 99,000 miles. Check engine

Drop in to an Autozone, or Pep Boys, or similar big parts store & they will usually scan for codes free. This will hopefully eliminate all the guess work, or at least point everyone in right direction for better diagnosis. If not obvious from codes what the problem is, get back to us and we'll help you out.

Testimonial: "Thanks for the great suggestion . I'll have Autozone read the codes on Monday. Thanks again!"

SOURCE: my subaru was running fine and later on the

Try changing the ignition coil.
The easy way to test this, is turn the ignition on,for about thirty second's ,then feel the coil ,if it is hot ,replace it.

SOURCE: 93 Impreza hesitation at low rpm light backfire

Check the WOT sensor. WOT = Wide open throttle.