Hello, I'm new here, and ill be honest. I'm here because this 460 has taken any pride in working around engines folded it neatly and stomped on it. Ill get to the facts and if any wisdom can be dispursed ill be happy to listen.
I purchased a 1965 Ford truck not running and now i suspect it may have never ran since engine was installed. It appears to be a fresh build so anything could wrong. The gentlemen who began this project has passed so ill never know.
Truck will start but its hard to start and runs terribly when it does. It will backfire through tailpipes if accelerated much. It will backfire through the carb as well. You need choke to be on to start as well as throttle opened. Which seems to be a function to funnel fuel into engine. You can never open choke all the way or it will die. Adding external fuel like carb cleaner doesnt seem to help or hinder it. You might have to turn distributor to aid starting as well.
Now for whats been done or checked.
It has a new fuel tank, lines, pump, carburetor is holley 750 it has been soaked and had a kit installed. I found a strange hole in metering block so i purchased another one and installed it. You can turn air flow screws all the way in while running and nothing changes. Set fuel level so it will slosh when you bump fender.
I installed electronic ignition, a new coil, owner before me installed new napa cap,rotor, wires, and plugs. They were fuel fouled and i have installed another set since. Appear to be fouled again. I checked distributor shaft to make sure it wasnt slipping on shaft.
I pulled plugs opened the throttle and did a cranking compression test. 150 lbs on every cylinder. I pulled number one cylinder where it blew my finger out and balancer was near zero degrees. I dialed it in and pulled cap, rotor is on number one cylinder on cap. I have checked firing order multiple times 15426378 and rotation is counter clockwise.
With number one on tdc i put shop air in the cylinder wondering if the timing chain was not lined up when installed. No air leakage except through valve cover breather. I am hoping its just rings not seated yet.
I could hear what sounded like rocker arm tick while running so I pulled valve covers and looked for any obvious problems. I found a couple rockers loose so after reading about adjustments i put each rocker on base side of cam lobe set to zero lash then gave them 1/2 turn preload. Running issues stayed the same. I inculded some pictures below.
One thing i cant figure out is there is less than 1" of cranking vacuum. You can put a rag in carburetor while cranking no change. I used a smoke machine to check for vacumm leaks but nothing showed up.
I apologize for the long post but ive tried to cover basic checks before taking time from anyone. At this point i considered buying a new carburetor but thats alot to spend on a guess. I cant figure out the cranking vacuum issue. Is it possible to somehow have wrong cam but still have cranking compression? I'm grasping at straws at this point. Any ideas are appreciated.
I purchased a 1965 Ford truck not running and now i suspect it may have never ran since engine was installed. It appears to be a fresh build so anything could wrong. The gentlemen who began this project has passed so ill never know.
Truck will start but its hard to start and runs terribly when it does. It will backfire through tailpipes if accelerated much. It will backfire through the carb as well. You need choke to be on to start as well as throttle opened. Which seems to be a function to funnel fuel into engine. You can never open choke all the way or it will die. Adding external fuel like carb cleaner doesnt seem to help or hinder it. You might have to turn distributor to aid starting as well.
Now for whats been done or checked.
It has a new fuel tank, lines, pump, carburetor is holley 750 it has been soaked and had a kit installed. I found a strange hole in metering block so i purchased another one and installed it. You can turn air flow screws all the way in while running and nothing changes. Set fuel level so it will slosh when you bump fender.
I installed electronic ignition, a new coil, owner before me installed new napa cap,rotor, wires, and plugs. They were fuel fouled and i have installed another set since. Appear to be fouled again. I checked distributor shaft to make sure it wasnt slipping on shaft.
I pulled plugs opened the throttle and did a cranking compression test. 150 lbs on every cylinder. I pulled number one cylinder where it blew my finger out and balancer was near zero degrees. I dialed it in and pulled cap, rotor is on number one cylinder on cap. I have checked firing order multiple times 15426378 and rotation is counter clockwise.
With number one on tdc i put shop air in the cylinder wondering if the timing chain was not lined up when installed. No air leakage except through valve cover breather. I am hoping its just rings not seated yet.
I could hear what sounded like rocker arm tick while running so I pulled valve covers and looked for any obvious problems. I found a couple rockers loose so after reading about adjustments i put each rocker on base side of cam lobe set to zero lash then gave them 1/2 turn preload. Running issues stayed the same. I inculded some pictures below.
One thing i cant figure out is there is less than 1" of cranking vacuum. You can put a rag in carburetor while cranking no change. I used a smoke machine to check for vacumm leaks but nothing showed up.
I apologize for the long post but ive tried to cover basic checks before taking time from anyone. At this point i considered buying a new carburetor but thats alot to spend on a guess. I cant figure out the cranking vacuum issue. Is it possible to somehow have wrong cam but still have cranking compression? I'm grasping at straws at this point. Any ideas are appreciated.
