#1 cylinder dead 100lbs comp good spark injectors good


Asked by Jun 28, 2014 at 08:22 AM about the 1998 Subaru Legacy 4 Dr Outback Limited AWD Wagon

Question type: Maintenance & Repair

100.000miles #1 cly dead 100lbs comp no leaks in intake no leak down in cly did all tests i could think of!!!!!!

4 Answers


What is the question, again? You say you have a dead cylinder then you say it is 100 pounds- dead, to me, is ZERO

Best Answer

thats why im confused???? it runs with a miss?????


Which engine do you have? Unless it's turbo charged or Diesel engine your compression ratio is either 10.5:1 or 10.0:1. Your psi should be running 157.5 to 210 psi (10.5:1) or 150 to 200 psi (10:1). If you at 100 psi that's way to low. What are the psi numbers on the other cylinders? Add a little oil in that cylinder and see if psi rises. If it does then its a ring issue. If it does not its probably a valve issue.


Also if it's the 2.5L that's an interference engine. Meaning if timing belt breaks, jumps time or is not installed properly the pistons can come in contact with the valves causing bent valves.

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