View Single Post
  #2  
Old 12-13-2018, 10:12 PM
Diseasel300's Avatar
Diseasel300 Diseasel300 is offline
Registered User
 
Join Date: May 2016
Posts: 6,023
A weak cylinder absolutely will smooth out with revs. Don't believe it? Crack an injector line and rev the engine up to 2 grand. You'll swear it was "smooth".

The "puff" noise in the exhaust is a clue...you probably have worn valve guides/seats causing a compression leak.

Compression and/or leakdown test should be in your future to diagnose further.
Reply With Quote