TOTALLY STUMPED!! I have a 1998 Subaru Forester S. Had a miss fire on # 1 cylinder. Put in new plugs, wires, coil pack, miss fire is gone...BUT... then the car sputters when you push the throttle. If you ease into the throttle it's ok. Idles fine. Other new parts we have tried to fix this are... cam sensor, TPS, fuel filter, and cleaned the EGR. Any ideas what is causing this?

20

Asked by kpierce2509 Mar 11, 2014 at 08:27 AM about the 1998 Subaru Forester S

Question type: Maintenance & Repair

Had a miss fire on # 1 cylinder. Put in new plugs, wires, coil pack, miss fire is
gone...BUT... then the car sputters when you push the throttle. If you ease into the throttle
it's ok. Idles fine. Other new parts we have tried to fix this are... cam sensor, TPS, fuel
filter, and cleaned the EGR. Any ideas what is causing this?

8 Answers

5,435

Does it sputter in neutral when doing this as well?

20

Yes it does it when you get on the throttle a bit quick. If you ease into the throttle it seems okay.

1 people found this helpful.
5,435

Does it throw a check engine light or anything for this?

3 people found this helpful.
20

If I stay in the throttle when it starts to sputter it will. If I let off and let it clear itself the light will not come on.

20

One code is for evap, had a miss fire on #1 once. since I put the cam sensor, fuel filter, and TPS in I have managed to get out of the throttle quick enough for the sputter to clear before it throws a code. Someone said there is a vacuum controlled fuel sensor on the fuel rail that could be the problem. Does that sound right?

5,435

It sounds like you're trying more to avoid the code than you are to fix what the issue is. The evap is separate, but do you keep only getting the misfire for cylinder 1, or does it misfire on more than just that cylinder?

2 people found this helpful.
555

test your knock sensor and crank pos sensor. could be a clogged or faulty injector as well. and last but not least a clogged cat. also check all vacume lines

1 people found this helpful.

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