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| | | | Joined: Dec 2011 Posts: 99 Shop Shark | | Shop Shark Joined: Dec 2011 Posts: 99 |
Truck: 1953 1/2 Ton 3100
Engine: Original 216 running 6V Generator
I had been having problem with a weak starting engine with idle problems and hesitation. I replaced grounding straps, battery, battery cables, starter wire, and then rebuilt the Rochester B Carb after noticing it seemed to be running very rich and leaking onto manifold. Sure enough the float was way high leading to excessively rich mixture. Now, it will start quickly and idle without the usually required 1-2" of choke.
I am not sure if I set the choke cable properly into the carb nor if the idle mixture screw is set correctly. It seems like it is idling really low, which might be OK but doesn't sound right. Doesn't sound like a normal Stove bolt 216 if that makes sense. Missing that steady quiet lobing sound...
Additionally the engine seems to shake the cab and frame side to side more than before. Does that make any sense? Seems almost like a misfire issue or is the usual firing just more pronounced at a irregular low idle? This was not noticed before the Carb work. Everything has been checked electrically to ensure all distributor and coil cables are clean and tight. Nothing seems to be loose or moved.
Thoughts?
Thx!
Last edited by Saint; 01/23/2012 1:40 PM.
| | | | | Joined: Sep 2003 Posts: 200 Shop Shark | | Shop Shark Joined: Sep 2003 Posts: 200 | Here is where I would start: let it warm up, bring the idle speed up until it smooths, then adjust mixture screw for best idle speed. Then reset the idle speed screw for the idle that you like. If you have already done this then once it's running turn your distributor and see if it smooths. Check for vacuum leaks. If all is well there, I would recheck floats.
Hope this is helpful.
Mark
1951 Chevy 3100
Some days you get the bear. Some days the bear gets you.
| | | | | Joined: Dec 2011 Posts: 99 Shop Shark | | Shop Shark Joined: Dec 2011 Posts: 99 | Thanks for the info, Mark & Dads50!
| | | | | Joined: Apr 2009 Posts: 252 Shop Shark | | Shop Shark Joined: Apr 2009 Posts: 252 | I just finished a 235 with a rough idle, vacuum leak at intake. | | | | | Joined: Sep 2003 Posts: 200 Shop Shark | | Shop Shark Joined: Sep 2003 Posts: 200 | Hey Saint,
Hows that engine running? Did you get a chance to look it over?
Mark
1951 Chevy 3100
Some days you get the bear. Some days the bear gets you.
| | | | | Joined: Sep 2003 Posts: 200 Shop Shark | | Shop Shark Joined: Sep 2003 Posts: 200 | Hey Saint!
Have you had time to work on this? Let us know what you find.
Mark
1951 Chevy 3100
Some days you get the bear. Some days the bear gets you.
| | | | | Joined: Dec 2008 Posts: 1,922 'Bolter | | 'Bolter Joined: Dec 2008 Posts: 1,922 | Gets better when you speed it up: intake leak
Gets much worse when you speed it up: 1 cylinder is out (fouled plug, bad wire, cracked cap) | | |
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