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Backfires

Tiny
D122402P
  • MEMBER
  • 2007 FORD FREESTAR
  • 4.2L
  • V6
  • FWD
  • AUTOMATIC
  • 120,000 MILES
Poor take off & hesitation. Replaced iac valve & cleaned throttle body. Almost acts like it's up againist the rev limited if u idle up quickly
Monday, June 2nd, 2014 AT 9:46 PM

7 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
Has the check engine light come on? Here is a guide that will help find and fix the backfire issue.

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

Please run down this guide and report back.
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Tuesday, June 3rd, 2014 AT 4:55 AM
Tiny
D122402P
  • MEMBER
  • 2 POSTS
No it has not come on but, it is working. Thanks for the guide I found the camshaft had a flat lobe. What a great resource this site is I love it.
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Tuesday, June 3rd, 2014 AT 7:06 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
This can help as well

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

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Tuesday, June 3rd, 2014 AT 8:34 AM
Tiny
LOCAL 25
  • MEMBER
  • 1 POST
  • 2004 FORD FREESTAR
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 123,000 MILES
Engine runnin rough and backfiring
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Sunday, March 10th, 2019 AT 11:39 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Engine running rough or misfiring can be cause by the following:

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

1.Defective spark plugs
2.Inadequate spark/coil,defective spark plug wire.
3.Lack of compression
4.False air leakage.
5.Faulty fuel injectors.
6.Insufficient fuel pressure.
7.Contaminated fuel.
8.EGR valve that is leaking.
9.Oxygen sensors.
10.Throttle position sensor.
11.Manifold absolute pressure sensor
12.Mass Airflow Sensor
13.Idle air control valve

Note: If it doesn't apply disregard it-
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Sunday, March 10th, 2019 AT 11:39 AM (Merged)
Tiny
KCBRISSET
  • MEMBER
  • 1 POST
  • 2004 FORD FREESTAR
2004 ford freestar stall while driving then when go to start again it takes about ten trys before I can go then start to putter almose want to back fire so change the fuel filter now puter n want to back fire but kills instead
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Sunday, March 10th, 2019 AT 11:39 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the fuel pressure if its within specs fuel pump could be on its way out-also the engine coolant temperature sensor and idle air control valve/MAF sensor
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Sunday, March 10th, 2019 AT 11:39 AM (Merged)

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