*NickC* asked,
*The problem is one side of the carb is running too rich and making the exhaust temps to high on it's cylinders. I can't adjust it any lower. The floats and vacuum check out ok.*
I hope I'm not reading this correctly, or the engine may already be scrap!
You don't adjust the fuel delivery 'lower' when you have a hot set of tubes! Excess heat is a sign that the bank is TOO LEAN already!
1. Look for some small holes at the top of the Venturi throats in the carb. These are mixture air bleeds. Spray carb cleaner down them with the vehicle running. If the idle doesn't change, you have a plugged passage. (get the carb cleaner with the little red tube, it helps a lot for this)
2. Put your fingers over the two outside air bleeds first, then the two inside ones. Holding your fingers over one set should do nothing, the other set should really screw up the idle. If you get no change, you have blocked passages.
3. With the engine off, Turn in the idle mixture screws all the way GENTLY! These screws are very fragile, so DO NOT torque on them.
4. Immediately back both screws out 2 turns.
5. Set the parking brake, and chalk the wheels.
6. Start the engine, and let it get up to operating temperature.
7. Put the vehicle in reverse, so if something goes wrong, it goes away from you.
8. Attach a vacuum gauge to the carbs base plate, or to manifold vacuum,...
NOT THE PVC LINE!
9. Turn both screws TOGETHER! 1/4 turn at a time until you get the highest vacuum reading. Both screws must turn together!
10. If you want to see if your idle mixture screws are working, screw them BOTH in the same amount until you get a lean misfire condition, and back them out about 1/4 turn. Then screw in one at a time until you get a misfire. If both cause a misfire, you probably haven't damaged the needles on the end of the screws.
If you can't get it to richen up, or lean out, the screws are messed up, or a passage is blocked.
REMEMBER TO SET THE SCREWS THE SAME AMOUNT OUT, AND AT THE HIGHEST VACUUM WHEN YOU ARE DONE!
11. Have a beer, your idle mixture is set correctly.
If you have leaned out the one bank, you may have already burned the valve seats, or a dozen other nasty things. Good luck dude... Aaron.
If Chris Columbus "Discovered" America (with 25 million already here), Can I Go "Discover" Florida?
*The problem is one side of the carb is running too rich and making the exhaust temps to high on it's cylinders. I can't adjust it any lower. The floats and vacuum check out ok.*
I hope I'm not reading this correctly, or the engine may already be scrap!
You don't adjust the fuel delivery 'lower' when you have a hot set of tubes! Excess heat is a sign that the bank is TOO LEAN already!
1. Look for some small holes at the top of the Venturi throats in the carb. These are mixture air bleeds. Spray carb cleaner down them with the vehicle running. If the idle doesn't change, you have a plugged passage. (get the carb cleaner with the little red tube, it helps a lot for this)
2. Put your fingers over the two outside air bleeds first, then the two inside ones. Holding your fingers over one set should do nothing, the other set should really screw up the idle. If you get no change, you have blocked passages.
3. With the engine off, Turn in the idle mixture screws all the way GENTLY! These screws are very fragile, so DO NOT torque on them.
4. Immediately back both screws out 2 turns.
5. Set the parking brake, and chalk the wheels.
6. Start the engine, and let it get up to operating temperature.
7. Put the vehicle in reverse, so if something goes wrong, it goes away from you.
8. Attach a vacuum gauge to the carbs base plate, or to manifold vacuum,...
NOT THE PVC LINE!
9. Turn both screws TOGETHER! 1/4 turn at a time until you get the highest vacuum reading. Both screws must turn together!
10. If you want to see if your idle mixture screws are working, screw them BOTH in the same amount until you get a lean misfire condition, and back them out about 1/4 turn. Then screw in one at a time until you get a misfire. If both cause a misfire, you probably haven't damaged the needles on the end of the screws.
If you can't get it to richen up, or lean out, the screws are messed up, or a passage is blocked.
REMEMBER TO SET THE SCREWS THE SAME AMOUNT OUT, AND AT THE HIGHEST VACUUM WHEN YOU ARE DONE!
11. Have a beer, your idle mixture is set correctly.
If you have leaned out the one bank, you may have already burned the valve seats, or a dozen other nasty things. Good luck dude... Aaron.
If Chris Columbus "Discovered" America (with 25 million already here), Can I Go "Discover" Florida?
