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39 Posts
So, I've had great input regarding the 351C in my 1973 Cougar XR-7 convertible. It's come a long way. No more overheating (wrong thermostat was in there from last "mechanic" to work on it), had points system removed and replaced with electronic system and had new Edelbrock thunder series 650cfm carb put on, yet I still struggled with hot starts. Engine started beautifully when cold, but it still was terrible when starting warm (mind you the temp was still just over the "C"). The engine would turn over and over and just rumble to a start rather than starting cool. This is with a new high torque mini starter, new battery, and alternator...meaning the engine is turning over at full speed. So, I decided to try a carb spacer. I ordered a square bore 0.5" spacer made by Edelbrock from Summitt Racing and put that between the Holley single plane intake and the carb. The gaskets are all in place and I am 99.9% sure there are no vacuum leaks. That brings us to today...things are better with the carb spacer, but still far from perfect. What I am wondering is if there are adjustments needed with the carb? There is a fuel filter that stays choc full of fuel, so I don't think it is a vapor lock issue with the fuel line. Could it be an issue of the carb "flooding" when the vehicle is shut off? If you turn the car off when it is warm, then immediately turn the key, it fires right back up, but let it sit for ten or fifteen minutes, it is difficult to start. I am planning to go back to the shop that installed the carb - they have a good reputation - but I wish I had some idea as to what could be going on. The only other symptom present is that the car hesitates sometimes when you floor it. Push the pedal hard and it will hesitate...any input would be greatly appreciated. I want to believe that it is something simple! Thanks, Tyson