I can't see my timing marks with the timing light. The engine runs fine, but the idle is a bit high. I have 20" of vacuum at idle. If I retard the timing, moving the vacuum advance toward the passenger side of the car, the car will run rough and stall. I do not had a stock cam but it is not radical see the specs below. It's a Crane energizer and the timing set I replaced I set the marks at TDC, not an alternative advance of retard setting. Could the harmonic balancer have slipped over the years? I'm assuming it's an original HB based on the Ford part number being either C4OE or C3OE, I don't remember. I do have a new HB I bought that I could replace it with. Now it's been awhile. Can I remove the HB without removing the radiator? I do have a fan shroud and a thermal clutch fan.
I would appreciate any insight.
Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: 1,200-4,200
Intake Duration at 050 inch Lift: 204 Exhaust Duration at 050 inch Lift: 204
Duration at 050 inch Lift: 204 int./204 exh.
Advertised Intake Duration: 260
Advertised Exhaust Duration: 260
Advertised Duration: 260 int./260 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.456 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.456 in . Valve Lift with Factory Rocker Arm Ratio: 0.456 int./0.456 exh. Lobe Separation (degrees): 110
I would appreciate any insight.
Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: 1,200-4,200
Intake Duration at 050 inch Lift: 204 Exhaust Duration at 050 inch Lift: 204
Duration at 050 inch Lift: 204 int./204 exh.
Advertised Intake Duration: 260
Advertised Exhaust Duration: 260
Advertised Duration: 260 int./260 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.456 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.456 in . Valve Lift with Factory Rocker Arm Ratio: 0.456 int./0.456 exh. Lobe Separation (degrees): 110
