8th Generation Honda Civic Forum - View Single Post - blow-by or something else, bad MPG

mamyta · 10-13-2008, 11:03 PM

just came back from the dealership...

here are the results from the compression test (but I paid for it).
1st Cylinder: 200 psi
2-nd Cylinder: 198 psi
3-rd Cylinder: 202 psi
4-th Cylinder: 201 psi

according the Service Advisor it should be 200 psi
so it looks that the compression is perfect...

so I'm much more "relaxed" that at least the engine is fine..
still wondering what can cause the excessive air coming out of the engine, power loss and bad mpg?

according Honda dealership :
- average combined MPG on low end = 24.5 mpg
- average combined MPG on high end = 36.5 mpg

looks pretty low to me...

P.S.
2 PCM updates were performed. I couldn't get more information what exactly these updates were for.

10-13-2008, 11:03 PM	#12 (permalink)
mamyta Junior Member Join Date: Apr 2008 Posts: 11	just came back from the dealership... here are the results from the compression test (but I paid for it). 1st Cylinder: 200 psi 2-nd Cylinder: 198 psi 3-rd Cylinder: 202 psi 4-th Cylinder: 201 psi according the Service Advisor it should be 200 psi so it looks that the compression is perfect... so I'm much more "relaxed" that at least the engine is fine.. still wondering what can cause the excessive air coming out of the engine, power loss and bad mpg? according Honda dealership : - average combined MPG on low end = 24.5 mpg - average combined MPG on high end = 36.5 mpg looks pretty low to me... P.S. 2 PCM updates were performed. I couldn't get more information what exactly these updates were for.