[California98Civic]

Originally Posted by Xist

Costco replaced my battery for free yesterday and a friend helped me do a compression test. YouTube mechanics said 5-10 seconds, so she did it three, and we got 140, 140, 130, and 130 (Difference: 10, 7-8%). I saw more people saying 5-10 seconds, so I rented the gauge again, drove twenty-five miles to warm the engine, and then realized I was out of time, so I drove straight to my first client's house wearing a t-shirt, shorts, and ratty old shoes instead of a polo, dress pants, and nice shoes. Today I was running out of time again, so I just drove six miles to Costco for gas. I came home and got:
Five seconds: 135, 141, 151, 149 (Difference: 16, 10%)
Ten seconds: 154, 154, 159, 166 (Difference: 12, 8%)
Ten seconds with oil: 166, 172, 174, 181 (Difference: 15, 9%)

Here is my compression test: http://ecomodder.com/forum/showthrea...tml#post471687

Also, I quoted my Honda FSM as saying "compression should be 184psi (nominal), 135psi (minimum), and no variation greater than 28 psi between cylinders."

Your numbers appear acceptable, though only minimally so in the five second dry test.