351M...idle problems!!!...HELP!!!!
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Joined: Dec 2002
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From: chicago burbs
you can check the vacuum advance by using a Vacula tool and a timing light, you'll see the timing marks move and the engine should gain rpm as vacuum is applied to the can
same for the mechanical advance but w/o the Vacula, timing marks will move as engine rpm increases and should return to where they started out at idle and stay pretty steady
if the dizzy is hooked up to Ported Vacuum there won't be any at idle, it starts pulling somewhere a little above idle, not the greatest for performance but good for emissions & economy. you can T in a vacuum gauge to the dizzy hose an see what it pulls & when, run a long hose around through the drivers window & go for a ride
that's pretty much the first thing to check though, what all is goin on with the timing...
same for the mechanical advance but w/o the Vacula, timing marks will move as engine rpm increases and should return to where they started out at idle and stay pretty steady
if the dizzy is hooked up to Ported Vacuum there won't be any at idle, it starts pulling somewhere a little above idle, not the greatest for performance but good for emissions & economy. you can T in a vacuum gauge to the dizzy hose an see what it pulls & when, run a long hose around through the drivers window & go for a ride
that's pretty much the first thing to check though, what all is goin on with the timing...
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Joined: Jan 2012
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you can check the vacuum advance by using a Vacula tool and a timing light, you'll see the timing marks move and the engine should gain rpm as vacuum is applied to the can
same for the mechanical advance but w/o the Vacula, timing marks will move as engine rpm increases and should return to where they started out at idle and stay pretty steady
if the dizzy is hooked up to Ported Vacuum there won't be any at idle, it starts pulling somewhere a little above idle, not the greatest for performance but good for emissions & economy. you can T in a vacuum gauge to the dizzy hose an see what it pulls & when, run a long hose around through the drivers window & go for a ride
that's pretty much the first thing to check though, what all is goin on with the timing...
same for the mechanical advance but w/o the Vacula, timing marks will move as engine rpm increases and should return to where they started out at idle and stay pretty steady
if the dizzy is hooked up to Ported Vacuum there won't be any at idle, it starts pulling somewhere a little above idle, not the greatest for performance but good for emissions & economy. you can T in a vacuum gauge to the dizzy hose an see what it pulls & when, run a long hose around through the drivers window & go for a ride
that's pretty much the first thing to check though, what all is goin on with the timing...
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