Misfires, hesitation?

2007 SUBARU IMPREZA
207,000 MILES • 2.5L • 4 CYL • 4WD • MANUAL
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SHOCKERM
  • MEMBER
  • 1 POST
The car misfires and idles rough, it has hesitation upon acceleration and spits and sputters around 4,500 RPMs. new plugs/wires coil, injectors 02 sensors, checked compression and fuel pressure already.
Mar 1, 2023 at 9:19 AM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
It sounds like the MAF sensor is not working correctly but we should run the codes to see what comes up. Here is a guide to help you and the location of the sensor so you can check it out and replace it if necessary:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

We should check the catalytic converter as well.

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

Also, I would check to make sure the air intake boot is connected properly. Check out the images (below). Please let us know what happens. Please go over these guides and report back.
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Mar 2, 2023 at 5:40 PM
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