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- Engine Performance (https://www.miataturbo.net/engine-performance-56/)

- - Low compression (https://www.miataturbo.net/engine-performance-56/low-compression-91182/)

Jonathan Moore

11-11-2016 07:18 AM

Low compression

Just bought a 1990 miata, one of the cylinders have low compression. Any one have any ideas why?

Girz0r

11-11-2016 08:10 AM

How many miles? :facepalm:

Jonathan Moore

11-11-2016 08:19 AM

220000

Girz0r

11-11-2016 08:33 AM

Quote:

Originally Posted by Jonathan Moore (Post 1373692)

220000

http://img.pandawhale.com/post-71396...r-gi-4RVZ.gif?

More than likely it's a very tired old motor that needs new rings.

What cylinder is it low on? My guess is #4 :party:

mmmjesse

11-11-2016 08:50 AM

how about you google "low engine compression" and find out all the possible causes? Then you can focus on ruling out the individual potential causes?

Oh wait, i forgot we have these crystal balls we can use and figure out whats wrong for you. Next time give us even less information, if thats possible, to figure out whats going on.

acedeuce802

11-11-2016 09:02 AM

I'm going to go out on a limb and say that you probably have low compression because either your cylinder has some sort of leak, or the piston isn't reaching as high as it should. That's about all I can tell you from the info you provided.

18psi

11-11-2016 12:50 PM

it's because you're dumb and lazy

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