Yay vacuum!

[Husky]

http://smg.photobucket.com/albums/v211/boa_titan/Car%20Vids/?action=view&current=DCFC0072.flv

So, this is my idle vacuum. It hovers around 15 inches of mercury, but it twitches really badly, up and down 4 PSI very rapidly. After revving it, the vacuum shoots up real high(normal maybe) and then as the engine bogs and tries to die, it drops to almost zero vacuum. That's a link to the vid I made of it... LMK what you guys think. Thanks!

[series8217]

Looks normal to me.

[ryan.hess]

Is this supposed to be in maintenance or something? Is that loud clacking your injectors, or one of your lifters?

btw, engine shouldn't bog and die, or go to 0 vacuum

[Husky]

Just realized I posted this in performance instead of maintenance. Sry guys.


It's several lifters, can't tell if they're about to take a shit on me or not, but they probably are.

And I didn't know what normal vacuum was, but I didn't think it was supposed to bounce around a bunch. And yeah, I need to figure out why it bogs and dies.

[ryan.hess]

To me, it sounds like one or more of your lifters collapsed... so basically you're running on fewer than 6 cylinders.

You might want to try using one of those "oil flush" bottles. Maybe you've got some crud holding the check ball open on those lifters.

[Mach10]

Wavering vacuum can mean a bunch of things;

-Valve sealing problems
-Cam phasing problems
-timing problems (missing)
-carbon/preignition problems.
-Exhaust plugging issues.
-Ring sealing problems.

I'd check all the normal tune-up junk before panicking.

there's a ratsnest of vacuum hoses. Go over them, first, although your average vacuum is about right...

[Husky]

Okay... Just wanted to check, I had someone telling me idle vacuum should be almost 30 on this motor. I'll see what's going on. How do I check for collapsed lifters, BTW? I don't want to have to pull the cam carriers off if I don't have to again.


The little button in the lifters was all the way out/open when they were out, and they were all stuck like that. Is that normal?