Hi everyone,
New to the forum, thanks for having me. I have an issue I just can’t figure out. I bought 65 mustang with ford 200 and c4 auto trans. The engine was rebuilt before I bought it with roughly 300 miles in 10 years and a lot of sitting. After bringing it home I noticed a rod knock and it did run / idle rough with vibration. I tore down the engine and found 3 bent push rods and a slightly bent connecting rod. After taking it up to the local race engine shop we measure the bore, replaced rod, pistons, rings, new push rods fresh hone on Cylinders and new rod bearings. New plugs, wires and adjustments to points, Carb was new but I gave it the once over and adjusted. New fuel pump and filter. Head and values are in good shape. It seems to run pretty well, has good power when driving but at idle it has a slight shake / vibration and when you put it in gear it shakes the car. I set timing 12dtdc checked for vacuum leaks and all is good. Ran a compression test to make sure the rings are seated and all cylinders are within 5% of each other at ~165-170psi. Hooked up the Vacuum gauge and seeing a slow slight variation from 18-18.75 with an idle of 700. When in gear the idle drops to about 550-600. Any thoughts or help on why the vacuum flux? I assume the vibration is tied to this…. Any help / guidance would be very helpful. I feel like I tried everything and can’t seem to solve.
New to the forum, thanks for having me. I have an issue I just can’t figure out. I bought 65 mustang with ford 200 and c4 auto trans. The engine was rebuilt before I bought it with roughly 300 miles in 10 years and a lot of sitting. After bringing it home I noticed a rod knock and it did run / idle rough with vibration. I tore down the engine and found 3 bent push rods and a slightly bent connecting rod. After taking it up to the local race engine shop we measure the bore, replaced rod, pistons, rings, new push rods fresh hone on Cylinders and new rod bearings. New plugs, wires and adjustments to points, Carb was new but I gave it the once over and adjusted. New fuel pump and filter. Head and values are in good shape. It seems to run pretty well, has good power when driving but at idle it has a slight shake / vibration and when you put it in gear it shakes the car. I set timing 12dtdc checked for vacuum leaks and all is good. Ran a compression test to make sure the rings are seated and all cylinders are within 5% of each other at ~165-170psi. Hooked up the Vacuum gauge and seeing a slow slight variation from 18-18.75 with an idle of 700. When in gear the idle drops to about 550-600. Any thoughts or help on why the vacuum flux? I assume the vibration is tied to this…. Any help / guidance would be very helpful. I feel like I tried everything and can’t seem to solve.