Car hesitates and rattling under hood

Tiny
CHAD LEAZER
  • MEMBER
  • 2006 FORD MUSTANG
  • 4.6L
  • V8
  • 2WD
  • AUTOMATIC
  • 140,000 MILES
In the past it would backfire when I hit passing gear. Recently it has been hesitating when I accelerate. It also makes a rattling noise until I let off of the gas. It threw a code saying it was a faulty cam shaft position sensor bank2. I replaced the sensor but problem persists. I am going to change plugs and coils next weekend. Any ideas? Thanks in advance.
Saturday, February 3rd, 2018 AT 6:44 PM

4 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,186 POSTS
Hello,

Do you still have a check engine light on? Also, if you can shoot a quick video of the engine noise and upload it here I can tell you exactly what the noise is.

Please let us know.

Cheers, Ken
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Monday, February 5th, 2018 AT 11:10 AM
Tiny
CHAD LEAZER
  • MEMBER
  • 3 POSTS
I tried to make a video while driving and one sitting idle after I got home. Quality probably is not the greatest. Thanks in advance for your time.
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Monday, February 5th, 2018 AT 12:47 PM
Tiny
CHAD LEAZER
  • MEMBER
  • 3 POSTS
Yes the check engine light is still on.
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Monday, February 5th, 2018 AT 12:48 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,186 POSTS
Thanks for the videos they really help. Because of the pulsing out of the exhaust pipe it sounds like you may have a burnt valve. From the first video right at the end I thought I heard a timing chain issue like a guide let go but will need more engine running video to be sure. (give it a quick rev)

I would first read the codes to see which cylinders are effected. Then remove the spark plugs to check their condition. Then I would roll a compression gauge into each for the cylinders and take readings.

Here are tow guides to help us find out whats going on:

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

and

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

and

https://www.2carpros.com/articles/how-to-test-engine-compression

Please let us know what you find. We are interested to see what it is.

Cheers, Ken
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Tuesday, February 6th, 2018 AT 10:42 AM

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