Low compression in one cylinder

Tiny
ERIC5735
  • MEMBER
  • 2002 MITSUBISHI DIAMANTE
  • V6
  • 2WD
  • AUTOMATIC
  • 172,000 MILES
Low compression in one cylinder. Should I change vacuum solenoid and EGR valve or should I not?
Monday, September 11th, 2017 AT 10:59 PM

1 Reply

Tiny
STEVE W.
  • MECHANIC
  • 12,996 POSTS
How low is low? Have you done a leak down test to determine what is causing the low compression?
Until you know what is happening changing anything would be a bad idea. Especially as loss of compression in one cylinder usually means an internal engine issue, not anything external.
Do a cylinder leak down test on the low cylinder and see where it leads.
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Tuesday, September 12th, 2017 AT 12:16 AM

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