I did a leak down test on my 1994 Honda Civic. The results I got were scary. #1cylindar- I did 100PSI and it held no air pressure. No air leaks out of Cylinder #2 but a little bit of air from #3 and #4. And exhaust leaked a little. #2 Cylinder- I did 100PSI and it held no air pressure. Small air leak out of Cylinder #2 #3 and #4. No air leakage from the exhaust. #3 Cylinder- I did 100PSI and it held no air pressure. No air leakage out of Cylinder #1 but more noticeable air coming from #2 and #4. And no exhaust leakage. #4 Cylinder â€“ I did 100 PSI and it held no air pressure but I didnâ€™t hear any air leakage anywhere. This is my first time doing a leak down test. But I made sure that each piston was Top Dead Center and that the car was in gear when I started the test. I either did this wrong or I am afraid that my Head Gasket needs to be replaced. But the thing is the car ran great up to this moment, if the Head Gasket needed to be replaced wouldnâ€™t there have been signs? Any help much appreciated! Thanks.