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Engine loses power, bucks and backfires

Tiny
IM774U2C
  • MEMBER
  • 2004 FORD FREESTAR
  • 3.9L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 250,000 MILES
Car loses power, spits, bucks, little backfire and just no get up and go. I would like to give it a tune up but 3 spark plugs are in the back. I can't see how to change them. Do you have any suggestions?
Wednesday, June 17th, 2020 AT 2:09 PM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon,

The first thing I would do with low power is filters. Change the fuel and air filter.

https://www.2carpros.com/articles/engine-has-low-power-output

https://www.2carpros.com/articles/how-to-change-a-fuel-filter

I would also check the fuel pressure as well. Low pressure from a bad fuel pump will cause this.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Check the catalytic converter. If is partially clogged,

https://www.2carpros.com/articles/catalytic-converter-replacement

Are there any codes in the system?

The plugs are tight in the back but you can get them by coming in from the sides.

https://www.2carpros.com/articles/how-to-change-spark-plugs

Roy
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Wednesday, June 17th, 2020 AT 2:41 PM

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