RPM Hanging
Holley Sniper on a 455. Having a problem with the RPM hanging up when I let off the throttle to come to an idle or even at a steady cruise. If I jab the throttle it will return to a normal idle. No mechanical interference hanging up the throttle cable. TPS shows 0% when it is happening. Can't find any vacuum leaks. The car just started doing this and I haven't changed anything in the tune. I have a datalog I can email.
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1979 TA 541/T56 Magnum
1964 Catalina 462/TKO600
1965 GTO 389/4speed
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