After a timing belt install... my evo turned over. And idled fine at cold idle... after about 10 minutes I shut it off... now it will only start after I apply some throttle... I'm receiving some heavy compressor surge from the turbo as it is idling at nearly positive boost pressure.... I'm lost and don't know where to begin.

 

Check your valve timing again! It is very easy to get it one tooth out. The first time I did it I had to put that damned belt on and off five times before I got it right.

 

Both cams are at TDC after two full rotations of the crank... crank is also at Tec at that time.. I'm pretty sure the car would not have started the first time if the timing was off

 

The car will start and run with the cams 2 teeth off. What do you mean by the cams are at TDC? Can you post a pic?

 

Try this from evomoto
http://www.evomoto.com/tech_info.php...2e78f242aa1910
Step 15 gives a good view of the cam gears when they are correctly timed.

 

sounds like your timing is off if its idling with different vacuum yes.

 

sorry i was at my friends shop and typing on my phone so i was rushing to get the msg out. My Cams are showing the same like in the picture.. the white notches line up with the notches in valve cover. the crank pulley is also showing proper timing. we then cycle the crank pulley through two rotations and it returns to the same position..

to add insult to injury i pulled a code while it was idling.. hooked up my laptop to evoscan and when i click the icon to review Diagnostic codes it tells me there is "no response from the ECU"

 

I uploaded a picture of the cams and crank pulley. .. when pulley is at BTDC the cams are timed correctly. When the crank pulley is timed the exhaust cam is slightly advanced and the intake cam is timed.


Issue is resolved... it wasn't timing.. the crank sensor blade was backwards... we flipped it around.. car fired right up and held solid idle with normal vaccum.