EJ20 in 97 Forester misfiring

gafsubi · Post by **gafsubi** » Sun Feb 15, 2009 1:16 pm

My 97 Forester's misfiring in the 2800-3000rpm range. Gets flat spots but clear after that. Starts and runs fine everywhere else.
It's recently been serviced with new plugs, leads and fuel filter but.....
Had been running on 90 RON but now on at least 95 RON, 98 when I can get it.

all suggestions welcome...within reason.

cheers

Thumpage44 · Post by **Thumpage44** » Sun Feb 15, 2009 7:41 pm

I have a similar problem with a ej20 with a recent plug,filters and oil change. Mines more in the 4500rpm range, Im interested to find out aswell.

Matatak · Post by **Matatak** » Sun Feb 15, 2009 7:58 pm

could be a coil issue.

AlpineRaven · Post by **AlpineRaven** » Mon Feb 16, 2009 6:13 pm

check for the codes and disconnect the battery overnight and see if you still have the problems. Sometimes it can be an ECM glitch..
Cheers
AP

BrennyV · Post by **BrennyV** » Tue Feb 17, 2009 10:31 am

Could be coil as Matt mentioned also check the plugs are correct for your car (i know it sounds simple)

Also is it braking down under load at that rev range? or all the time?

gafsubi · Post by **gafsubi** » Tue Feb 17, 2009 6:08 pm

(Also is it braking down under load at that rev range? or all the time?)

should have been more specific guys, it's only doing it under load. Very smooth all the way up when free revving.

Will be looking into all of it this weekend.
thanks to all so far. I'll keep you posted.

gafsubi · Post by **gafsubi** » Tue Feb 17, 2009 7:29 pm

BrennyV wrote:Could be coil as Matt mentioned also check the plugs are correct for your car (i know it sounds simple)

Also is it braking down under load at that rev range? or all the time?

Under load, should have said that to start with, sorry. It's free revving all the way up when not under load, doesn't miss a beat.