need help with boost...

i spike 18 but than drop down to 9 or 10 fast....i checked all the piping and their is no boost leak.....

Have you done an actual boost leak test? Check your vaccum lines too.

how do you do a test????

First you need to make a "boost leak tester" or purchase one...either way. They are pretty easy to make though...use a coupler(that's the size of the turbo inlet) put in a cap on the end of it(pvc seems to use the best)...put a bike air valve in the cap. Use clamps to seal in the air. Cap off the right side of the valve cover...fill air in system(through a compressor) through the valve on the boost leak tester...listen for leaks. Make sure car is off or if you have the rice plate(mopar bov) have the car in the 2nd position.

No Boost Leak.....