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Erratic idle on AQ225Ealso low vacuum

A

amxalan

New member
At 600 RPM I am pulling 10 lbs

At 600 RPM I am pulling 10 lbs or less of vacuum..I have the timing at 8 degrees BTDC per specs.The idle is not steady.Intake manifold gasgets and carb gaskets were replaced but no change in idle or vacuum.I can get 15 lbs vacuum if idle is increased to 1000 RPM. Any ideas on what would cause low vac and uneven idle??
 
"Late valve timing and intake

"Late valve timing and intake gaskets leak could give the symptoms you describe. Also, your choke could be acting-up. Check also for a defective lifter and also make sure that the idle mixture is correctly adjusted in the carb."
 
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