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Backfires through air manifold

Tiny
RICHARD LODGE
  • MEMBER
  • 2001 FORD RANGER
  • 2.5L
  • 4 CYL
  • 2WD
  • MANUAL
  • 165,000 MILES
Hard starting backfires a lot slow to respond to throttle low power, very hot exhaust manifold, have cleaned EGR and injectors. Replaced TPS, ICU cam sensor, MAF sensor, new timing belt marks on point and new plugs. I had injectors out to clean tested on fuel rail all pulsing at same time, new fuel pump.
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Monday, October 1st, 2018 AT 4:53 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,740 POSTS
Hi and thanks for using 2CarPros.com.

Confirm that the catalytic converter is not plugged. Also, a rich fuel mixture can cause this, so I recommend checking the fuel pressure to make sure the regulator is working. Here are links that shows how it is done. Also, I attached a link that discusses different causes for a backfire.

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

https://www.2carpros.com/articles/engine-backfires-while-running

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

Do these checks and let me know what you find.

Joe
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Tuesday, October 2nd, 2018 AT 6:53 PM

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