No I have not. I have done compression test. 132, 145,145,145.

 

I did a compression test recently before a cam job and had better numbers then those were but my #1 was @ 58% leak down, #2 & #3 were @ 38% leak down, and #4 was @ 28% leak down!!! (5%-10% is normal leak down #'s fyi) Had the head pulled and the exhaust valves were all crusty. Head is being rebuilt right now

 

My compression numbers were 162 158 158 147 but I failed the crap outta a leak down test. Just something to consider is all.....

 

I just did leak down test. 2 3 and 4th cylinder were ~5%. 1st cylinder was around 24%. Would this cause hesitation? Im aware that 1st cylinder is below the spec but does it require head removal?

 

I had the head work done at Strictly Modified and the owner Eric said that normal leak down is 5%-10% and I asked him at what point do you consider it a problem that needs addressing and he said 15% or higher is no good. Unfortunately theres a lot of reasons you could be getting that amount of leak down, slightly fried rings, crusty exhaust valves (like mine were), depending on mileage the intake valves could be coated in hardened oil residue, slightly bent valves could be the culprit too. I will tell you one thing tho, all that leakdown I had personally and my car never had a misfire ever.

 

If you still have the equipment to do the leak down test, you can eliminate the rings as the culprit with a little engine oil. Confirm your readings with another test just as you had done before. After that use about a teaspoon of engine oil into the spark plug tubes and turn the engine over by hand a couple of revolutions. Then run your leak down test again. If the numbers have improved significantly, the rings are the issue. If not, well then it's time to look at the head. You can also use a stethoscope to listen to the tailpipe and intake. If you can hear the hissing sound more prevalently from the exhaust, it's the exhaust valves, and vica-versa. You may want to pull the pressure hose off the intake to listen there, not at the air filter (you probably already knew this, but that's a long way for the sound to travel).

 

I think thats what strictly told me they did, they could hear air blowing out my tailpipe. Thats how they knew it was the exhaust valves. That last post is all good advice for sure.

 

Wish I could help out more...best of luck, and let us know how it's all progressing.

 

http://youtu.be/z3QcI_IrfwU

I've been busy and do not have much time for more intense troubleshooting. I found some time and managed to collect exhaust cam angle sensor reading. It seem to read fine but for some reason switches phase back and forth. I do not think this is normal. Could it be effected by crank position sensor? Maybe cps is bad?