I have my engine installed now, but I can't seem to get the idle right. Before I removed the engine I had it running absolutely perfect. It would start on the first crank every time, idle @ 1600rpm for a couple of minutes and then idle peasefully @ 850rpm all day.
The problem now is when I start it cold it will start right away and idle good @ 1700 rpm. Once the AAV starts to close the engine will stumble and when fully closed it will die completely. I have adjusted the throttle body idle adjustment and the air bypass valve for hours with no results. If the engine speed drops below 1300 rpm it will die.
I have a solid 33 PSI of fuel pressure at all rpm's, no vacume leaks and it doesn't seem to be running rich/lean. I did a compression test and all the cylinders are @ 110 PSI with one @ about 95 PSI. I also did a leakdow test and all the cylinders were excelent @ about 5% leakage from ring gaps. My ignition system is a MSD 6A with blaster coil and electronic point replacement and seems to be working good, it (engine) was also just rebuilt under 100 miles ago. I have tested the head temp sensor and the cold start valve is bypassed right now.
Anyone have any ideas?
I have checked pretty much everything. I am kinda pissed because it was running so well before I removed it to clean it up and paint it (no mechanical).
Please give me any and all suggestions. I would really like it to run well again.
Thanks, Dave
