Im guessing this is good, not liking cylinder 1 very much

Cylinder 1 - 130
Cylinder 2 -150
Cylinder 3 - 150
Clylinder 4 - 150

Opinions?

 

They all seem a little low, did you have the throttle open?

 

Throttle closed never did a conpression test before

 

That's borderline acceptable. When there is > 15% variance per cylinder, that's when it's time for a rebuild. Your a hair over 14% variance. I'd start off by investigating the cause. Preferrably with a leak down test, to get the best results.

Or if you don't have the correct equipment to perform the leak down, try adding a tablespoon of motor oil inside the spark plug hole. Then do the compression test. You will be able to tell if the valve seals or piston rings are bad by doing this. If the psi remains the same for the cylinder (ie 130 psi), then you can kinda assume the valve seals (or could be bent valve) are shot. But... If the results increase (say back up to 150 psi) then you can bet it's the pistons' rings are shot.

 

His 150's akin cyl 234 are low?

 

Fresh engine is 163 and I would look further into cyl 1 and remember to do your tests with the engine warm not cold.

 

Mine were at 180, 180, 170, 165. If you don't open the throttle butterfly you get lower, inaccurate results. Cylinder one is usually lower when you don't, not sure why though.

 

FYI, when you retest, unplug the coil packs from the harness and I think you need to unplug the relay for the fuel pump so you are not dumping fuel in the cylinders. If you have a low compression cylinder dump a little oil, maybe a cap full into the cylinder and retest. If it comes up the rings are worn(not bad unless your reading is like 30+ psi difference)

 

Just as I said in post #4.....

 

Yeah a little low

 

Adding oil made pressure go up to 155 rings are worn out...

 

Ouch!

How many miles are you at?

 

70k after buying it with 50k miles someone must have dogged her out alot, my car is a daily

 

do it with car at operating temp..

 

Dang. Must be the rings then. You're borderline below the acceptable "variance" (~15%) across the board. Are you having any of the symptoms of worn rings (i.e. burning/consuming oil, tough starts, idle instability etc..)?? If none of the above are too bad, I would ride it out for another 3,000 and check again. Just to see a trend.. Unless you just want to replace the rings now... And dont forget, like mentioned above me, do this all at or around operating temp (180ishF)