360 missing badly
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More Turbo
Joined: Jun 2001
Posts: 572
Likes: 1
360 missing badly
Hello, I have a 1974 F-350 with a 360 that I rebuilt about 3 years ago. This truck is strictly a farm truck and gets less than 200 miles a year on it.
I started hauling hay the other day and I noticed that the engine was missing bad under load and at lower throttle. although it idles great and runs great in 1st and 2nd gears, once you get into 3rd and espesially 4th it misses. I had to climb a hill in 1st gear
just to make it. once I got the first load unloaded i pulled into the garage to check the timing. it is right on 10*, next I reset the point gap to .017. this changed nothing. 
what else should i look for? It also has a Motorcraft 2100 carb on it. This is not a drad truck but it does commonly haul 5000 lbs or so. I would just like to get it back up and running smoothly.
Thanks for the help
I started hauling hay the other day and I noticed that the engine was missing bad under load and at lower throttle. although it idles great and runs great in 1st and 2nd gears, once you get into 3rd and espesially 4th it misses. I had to climb a hill in 1st gear
just to make it. once I got the first load unloaded i pulled into the garage to check the timing. it is right on 10*, next I reset the point gap to .017. this changed nothing. what else should i look for? It also has a Motorcraft 2100 carb on it. This is not a drad truck but it does commonly haul 5000 lbs or so. I would just like to get it back up and running smoothly.Thanks for the help
Cargo Master
Joined: Apr 2004
Posts: 2,574
Likes: 4
From: Golden, CO
The "could be" list is long:
Ignition is a great place to start. Wether it works or not, it's fairly consistent. Obvious stuff aside, was the distributer rebuilt? Bushings and springs wear out also. The last time I had a bad condenser, (a new one at that) it misfired at part throttle. The old one went back in before I left the driveway.
If the ignition checks OK, look at the fuel system. Problems there can act like ignition problems. Was the truck running hotter than normal? Check for vacuum leaks and adequate fuel supply. Three years of infrequent use is plenty of time for things to start gumming up. Luckily, the 2100 is cheap and easy to rebuild.
Past that you're looking at the mechanical. Even with new parts, given enough down time and enough humidity really wierd things can happen. Rings valves and lifters are always a concern, a little surface rust goes a long way here. If the spark and fuel check OK, add a Qt of ATF to your crankcase, run it through a few heat cycles before you change the oil. The stuff frees up sticky parts as well as anything.
Happy hunting, Mike
Ignition is a great place to start. Wether it works or not, it's fairly consistent. Obvious stuff aside, was the distributer rebuilt? Bushings and springs wear out also. The last time I had a bad condenser, (a new one at that) it misfired at part throttle. The old one went back in before I left the driveway.
If the ignition checks OK, look at the fuel system. Problems there can act like ignition problems. Was the truck running hotter than normal? Check for vacuum leaks and adequate fuel supply. Three years of infrequent use is plenty of time for things to start gumming up. Luckily, the 2100 is cheap and easy to rebuild.
Past that you're looking at the mechanical. Even with new parts, given enough down time and enough humidity really wierd things can happen. Rings valves and lifters are always a concern, a little surface rust goes a long way here. If the spark and fuel check OK, add a Qt of ATF to your crankcase, run it through a few heat cycles before you change the oil. The stuff frees up sticky parts as well as anything.
Happy hunting, Mike
New User
Joined: Aug 2004
Posts: 13
Likes: 0
From: Millheim PA
If your going to run atf in your crankcase plan on taking the pan off afterward and cleaning the pickup screen off. All the gunk in your engine is going to end up in the pan and could clog the screen. Good luck
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More Turbo
Joined: Jun 2001
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thanks for all the info. i will start with the plugs and work up from there. although this truck isn't driven much, I do try to start it and let it idle every two weeks or so. and I do live in the south where it is VERY humid. while I have the plugs out, i will probaly do a quick compression check.
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