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PROBLEM SOLVED!!!!!!!! Checked my front carb float chamber and it was bone dry, checked the rear chamber and it had fuel, so I removed the float and adjusted it like the rear one and that fixed the problem. Took it out for a test drive and it’s running great. I can’t believe I had this same issue with the front carburetors on both sets of carbs. Thats why I really didn’t think it was a carb issue. I guess it doesn’t pay to think sometimes. Thanks for all the input.
PROBLEM SOLVED!!!!!!!! Checked my front carb float chamber and it was bone dry, checked the rear chamber and it had fuel, so I removed the float and adjusted it like the rear one and that fixed the problem. Took it out for a test drive and it’s running great. I can’t believe I had this same issue with the front carburetors on both sets of carbs. Thats why I really didn’t think it was a carb issue. I guess it doesn’t pay to think sometimes. Thanks for all the input.
The firing order is 1, 5, 3, 6, 2, 4. I also should have mentioned that the problem started to occur with my original flat top carbs and I bought rebuilt ’72 round tops and it didn’t change a thing. I can’t understand why I’m getting such a low vacuum reading of 8-10″ with rapid occillation. I’ve researched the web on vacuum and they all list about 20 conditions and symptoms but none talk about mine (low with rapid fluctuations). The closest condition to mine points to the valves or weak valve springs, but I don’t know. the head that is on the car is a rebuilt one with 2K miles on it and I don’t know if the springs were replaced or my original ones were used. My original head had 100K miles on it. The problem started after about 1500miles on the rebuild and a severe overheating incident.
The firing order is 1, 5, 3, 6, 2, 4. I also should have mentioned that the problem started to occur with my original flat top carbs and I bought rebuilt ’72 round tops and it didn’t change a thing. I can’t understand why I’m getting such a low vacuum reading of 8-10″ with rapid occillation. I’ve researched the web on vacuum and they all list about 20 conditions and symptoms but none talk about mine (low with rapid fluctuations). The closest condition to mine points to the valves or weak valve springs, but I don’t know. the head that is on the car is a rebuilt one with 2K miles on it and I don’t know if the springs were replaced or my original ones were used. My original head had 100K miles on it. The problem started after about 1500miles on the rebuild and a severe overheating incident.