PanTTher

I'd like to compare your readings to mine. If you could take a look at block 204 and tell me the commanded and measured manifold pressure in millibars with the engine cold and hot, I'd appreciate it.

I've got a vacuum leak somewhere and it doesn't show until the engine warms up.

Lightweight-USPowah

<img src="http://images2.fotki.com/v22/photos/3/30429/123720/IMG_1773-vi.jpg">

<img src="http://images2.fotki.com/v14/photos/3/30429/188410/PressureTestor001-vi.jpg">

Heading to bed right now, but I can grab some readings for you in the AM if no one has em..<ul><li><a href="http://public.fotki.com/johnjacobjingleheimer/the_titty/engine_stuff/pressure_testor/">Pressure tester</a></li></ul>

PanTTher

There is something else going on.

carlosii

Please detail the materials that you used.

PanTTher

<center><img src="http://pictureposter.audiworld.com/7403/dsc00145_copy.jpg"></center><p>
various hoses and pressurize the system section by section.

to test the intercoolers &amp; other stuff in between disconnect the hose at the throttle body and the turbo outlet pipe by the manifold. Slide the caps on and tighten the worm clamps. slowly pressurize the system with compressed air. I don't recommend going any higher than 20 psi, where 10 to 15 psi should be more than good enough to expose leaks.

You can listen for leaks (if they're big you'll hear it) or you can make up some soap water (foam it up nicely) and brush it on all the joints. Bubbles will appear anywhere that there is a leak.

To test the intercoolers and intake manifold leave the hose on the throttle body connected. Make sure none of the intake valves are open. Pressurize the system to 15 psi or so. Again look for leaks.

You can also pressurize the whole system (turbo charger, intercoolers and intake manifold) by disconnecting the intake hose from the maf only, capping it and filling the plumbing with air. BUT MAKE SURE you don't exceed 4-5 psi of pressure because you might just blow off your valve cover cap, possibly gaskets, the intake hose and do some serious damage.

And always be very, very careful when playing with compressed air. If one of those caps blows off at 15 to 20 psi it can do some serious bodily harm to anyone close by if it hits them.