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2004 Subaru Impreza Misfire

Tiny
FISHMAN83
  • MEMBER
  • 2004 SUBARU IMPREZA
  • 2.0L
  • 4 CYL
  • TURBO
  • AWD
  • MANUAL
  • 156,000 MILES
When accelerating through the gears on freeway 5th gear lost power and struggled to maintain 80 mph. Check engine light started blinking. I took it to auto zone and they said it was a misfire in cylinder 1 and 4. I replaced all spark plugs and coil packs replaced fuel filter and cleaned the maf sensor. Took it back in to autozone now I have a misfire in all cylinders. Engine shakes while idling. Not sure what else I can do. Any suggestions?
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Wednesday, November 18th, 2015 AT 3:41 PM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Misfires are best left to pros to handle as they can be sensors, stuff you replaced, injectors or basic engine problems. Check your fuel pressure with a gauge that might be it and make sure your wires are hooked up correctly that you replaced. Fp should be 41-46 psi 41 minimum at idle.
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Thursday, November 19th, 2015 AT 6:23 AM

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