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Engine shaking like it has a vacum leak?

Tiny
STARSKY_33
  • MEMBER
  • 1993 MITSUBISHI EXPO
  • 113,715 MILES
I check spark plug look bad so I change them but it still shake when driving it feel like there a leak somewhere are something? Please help
Tuesday, October 11th, 2011 AT 5:20 AM

6 Replies

Tiny
RIVERMIKERAT
  • MECHANIC
  • 6,110 POSTS
It sounds like maybe a vacuum leak, timing issue, or crossed plug wires.
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Tuesday, October 11th, 2011 AT 5:23 AM
Tiny
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I use a can of carburetor and choke cleaner to check for vacuum leaks normally.
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Tuesday, October 11th, 2011 AT 5:26 AM
Tiny
STARSKY_33
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  • 4 POSTS
Check them there are all good? Could the fuel filter are 02 do this
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Tuesday, October 11th, 2011 AT 5:35 AM
Tiny
STARSKY_33
  • MEMBER
  • 4 POSTS
Try it and look at it there all good ! Could the 02 are fuel filter do it are cause it
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Tuesday, October 11th, 2011 AT 5:38 AM
Tiny
STARSKY_33
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  • 4 POSTS
I do have one question? Could the spark plug wire be bad even if it look new?
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Tuesday, October 11th, 2011 AT 5:42 AM
Tiny
RIVERMIKERAT
  • MECHANIC
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Yes it can. The O2 sensor can, if malfunctioning badly enough, it can cause the computer to hold the injectors open longer than necessary, causing an extremely rich condition which can cause a rough idle.

Check to see if it's throwing any codes, whether hard or soft.
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Tuesday, October 11th, 2011 AT 7:13 AM

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