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  • 1996 - 2004 SN95 Mustang -General/Talk-

Compression low on one cylinder

  • Thread starter Thread starter PDHSB
  • Start date Start date Sep 23, 2020

PDHSB

Member
Jun 11, 2020
37
5
18
VA
Sep 23, 2020
#1
  • Sep 23, 2020
  • #1
Been having trouble making power with my cammed 4.6, slowly getting up to speed but at the moment barely making stock power. I replaced the Dorman intake with an OE one from the junkyard, definitely felt a power jump.

Compression test on the left side is 120, 160, 170, 160.

Could this be why I'm down on power? Took out the spark plugs on the low cylinder (#5) and it's dry, ECU not throwing any codes either. Doing a leak down test regardless but I'm not sure fixing the lower compression will solve the mystery power loss.

Could this low cylinder be why I'm losing so much power?
 

Michael sommers

Member
Mar 25, 2020
95
8
8
Springfield,MO
Sep 25, 2020
#2
  • Sep 25, 2020
  • #2
Low compression can most definitely affect power pretty severely, so I’d lean towards that being the reason of power loss.
 
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