Join Date: Dec 2006
Location: Severna Park, MD
Ok, I can't add any additions things to check. But I can offer, first insure the easy basic tune-up points are checked or verified.
Don't be intimidated by these issues. Folks here have a lot of knowledge and a strong willingness to help. Also, it's never advisable to "play" with the carb settings or any settings, for that matter, without knowing what you're doing. As you stated, you don't know about them.
First things First.....
1. Adjust Point gap to specs. if you don't know, check your manual. If you don't have a manual, get one.
2. Clean and gapped all plugs to specs
3. Check all plug cables for correct firing order are clean and in good shape (no cracks)
4. Check and adjust timing per specs.
1. "Gently" re-seat both Air Mix screws (front of carb), then, turn out approx. 1.5 to 2 turns ( I believe, this is the basic setting)
2. Insure all of the linkage is clean and free to operate.
3. Adjust the idle speed to specs., using the idle adjustment screw on the side of the carb, where the throttle linkage is attached.
4. Verify the choke is fully open as noted by a vertical choke plate when the engine is warm. When cold, the choke plate should be closed, but, for an approx. 1/8" gap between the plate and the air horn (metal section surrounding it)
1. Vacuum leaks create all sorts of havoc with any engine.
A good tool for checking for leaks and learning the over-all health of your engine is a VAC gauge. It connects to the "full" vac port on the front of the carb. A healthy engine's Vac reading will be in the high teens, if not low 20s Hgs. Basically, the higher the VAC the healthier the engine. A wildly fluctuation needle is an indication of problems.
1. Insure the vacuum line to the modulator on the side of the transmission is in good condition. That is, the short rubber section at the modulator is firmly seating and in good condition. FYI, this is often over-looked and can be a source of vacuum leaks.
2. Based on what you stated, your other vac line to check is the one from the distributor vac canister to the base of the carb. Verify it's in good condition.
I did't really mention anything new that wasn't already offered by the guys here offering help. I just re-stated it in a way to make it easier for a Novice to understand. Good Luck and keep us posted on your results.
64 1/2 Poppy Red Cvt. Resto-Mod
333 Cu.in. T5z, 3:55, Dual 40 mm DCOE Webers
Performer RPM, CI cam, TFS/TWs, Tri-Ys, Discs w/Shelby Drums
Severna Park, Maryland
Last edited by kenash; 08-17-2019 at 01:56 PM.