Vacuum problem/AFR Cobra Intake, please help???

I'm having the same problems after a trick flow install(although I haven't checked the dipstick thing). I'm going to try messing with my PCV junk and see what happens. I think mine might be related to the AIC or TPS though.

Good luck

The suction is because you have a bad vacuum leak from the lower intake manifold not mating up properly with the heads. The gasket may have slipped out of place when you put the lower manifold on.

My favorite trick that saves time and effort is the stay in place gasket. Be sure that you scrape (don't use a wire brush) all the old gasket material off, then clean all the surfaces with acetone or MEK.

When the surfaces are clean, use weather strip adhesive on the head to manifold surface, and on the side of the gasket that mates to the head. Follow the instructions on the tube or can and when it gets tacky, press the gasket down on the head.

Clean the area where the rubber rails mount to the block in front and in the rear with more acetone or MEK and do the same trick with the weather strip adhesive that you did to the heads.

Coat the rubber seals and the gasket area around the water passages with lots of Blue Silicone gasket sealer and put it together. Wala! no leaks, and no gaskets that shifted out of place.

If you reuse the injectors from your old setup, a repair kit is available from most auto parts stores if needed. Coat the injector body "O" rings with oil before you use them and everything will slide back together. Take the other advice you got here and run with it.

Fuel injector seal kits with 2 O rings and a pintle cap (Borg-Warner P/N 274081) are available at Pep Boys auto parts. Cost is about $2.74 per kit. The following are listed at the Borg-Warner site ( http://www.borg-warner.com ) as being resellers of Borg-Warner parts:

http://www.partsplus.com/ or http://www.autovalue.com/ or http://www.pepboys.com/ or http://www.federatedautoparts.com/

Most of the links above have store locators for find a store in your area.

Use motor oil on the O rings when you re-assemble them & everything will slide into place. The gasoline will wash away any excess oil that gets in the wrong places and it will burn up in the combustion chamber.

What he said.

I have done this, and it can be quite difficult to troubleshoot.

Here is what it looked like
http://forums.stangnet.com/attachment.php?attachmentid=37227&d=1123979724

The Front intake gasket did not seal against the block. That intake runner was leaking to the lifter valley.

Good Luck
jason