problem with engine vacuum

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Nov 23, 2009 | 09:23 PM

kalebm22

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problem with engine vacuum

my mods are in the sig. i just put the le2 heads on the car and its only pulling 1-4 inchs of vaccuum and it doest want to idle and also ops and backfires under throttle. what could be causing this. i already had the cc503 and everything worked fine. could it be my valves arnt adjusted right?

Nov 23, 2009 | 09:32 PM

shbox

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From: Little Rock, AR

Valve too tight= poor vacuum. Start there.

Nov 23, 2009 | 10:04 PM

kalebm22

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Quote:

Originally Posted by shbox

Valve too tight= poor vacuum. Start there.

ok thanks,, i just wanted someone to confirm that before i started tearing it down to adjust them. the heads wouldnt effect vacuum would it?

Nov 23, 2009 | 11:03 PM

shbox

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As long as the valves close, nothing in the heads should be a vacuum issue. The intake manifold gasket to head seal would need to be tight, too.

Nov 23, 2009 | 11:14 PM

kalebm22

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Quote:

Originally Posted by shbox

As long as the valves close, nothing in the heads should be a vacuum issue. The intake manifold gasket to head seal would need to be tight, too.

ok, i sprayed starting fluid around the intake and it didnt bog so i assume its not that. but then again i could be wrong. wouldnt be the first time haha

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