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2002 Mitsubishi Galant # 4 Cylinder not working

Tiny
KLESEL6425
  • MEMBER
  • 2002 MITSUBISHI GALANT
  • 171,000 MILES
I had the car checked by two people and they both said the computer is telling them # 4 is not firing.
I put new plugs in last night and the wires were changed 2 years ago. It is still missing really bad.
What do you suggest?
Tuesday, November 19th, 2013 AT 8:03 AM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,716 POSTS
Are you getting a PO304? Have you checked the coil?
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Tuesday, November 19th, 2013 AT 8:17 AM
Tiny
KLESEL6425
  • MEMBER
  • 3 POSTS
Thanks for your quick response. No, have not checked coil. Would that prevent one cylinder not to fire? Also, can an auto parts store do a diagnostic on a coil do you know?
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Tuesday, November 19th, 2013 AT 8:30 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,716 POSTS
A few things can cause a cylinder not to work. Can you check some things for me?
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Tuesday, November 19th, 2013 AT 8:46 AM
Tiny
KLESEL6425
  • MEMBER
  • 3 POSTS
Yes.
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Tuesday, November 19th, 2013 AT 8:58 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,716 POSTS
The first thing I want you to do is check the bad cylinder to see if there is spark to the plug (also check the condition of the plug). You should get a hot blue snapping spark.

Here are directions:

https://www.2carpros.com/articles/how-to-test-an-ignition-system

If there is a good spark, check to see if the spark plug is wet with fuel.

Let me know what you find.
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Tuesday, November 19th, 2013 AT 5:06 PM

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