Totally stumped...
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7th Gear
Joined: Jan 2012
Posts: 7
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Totally stumped...
I'm hoping I can tap the wealth of knowledge on here. I have a 1959 F100 with the 292 in it. It's currently running awfully. It's showing symptoms of running lean but I can't seem to figure out why. Fuel pump is new and the carb is a newer edelbrock performer 550. Float height is set, needles are adjusted, ignition timing set, valve clearance adjusted and all orifices in the carb are unobstructed. I also have an insane smoking problem on the driver's side bank (5-8), but not on the other side. I can say this with confidence as the previous owner flipped the exhaust manifolds and welded tractor mufflers on to the end. So I basically have the exhaust shooting up where the hood will be soon. I appreciate your input.
Thanks
Thanks
Elder User
Joined: Dec 2006
Posts: 559
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From: Redondo Beach, CA
I'm still trying to get a visual on the flipped exhaust manifolds and tractor mufflers...
Check for manifold vac leaks. Do you have a PSV system? Check PSV valve. Could be stuck WFO allowing it to suck air and oil??
Smoking on one side, hmmm. Gotta think about that one. All cylinders on one side??
Check for manifold vac leaks. Do you have a PSV system? Check PSV valve. Could be stuck WFO allowing it to suck air and oil??
Smoking on one side, hmmm. Gotta think about that one. All cylinders on one side??
Elder User
Joined: Dec 2006
Posts: 559
Likes: 0
From: Redondo Beach, CA
No, but I thought I would ask. Never know if it was installed or not. Alot of people have installed them to suck the junk out of the crankcase, me included on my 312".
Just throwing some ideas at ya. I sure some of the others will jump in here... Mike, Charlie??
Just throwing some ideas at ya. I sure some of the others will jump in here... Mike, Charlie??
Postmaster
Joined: Jul 2003
Posts: 2,688
Likes: 4
From: Southern Oregon
I'm hoping I can tap the wealth of knowledge on here. I have a 1959 F100 with the 292 in it. It's currently running awfully. It's showing symptoms of running lean but I can't seem to figure out why. Fuel pump is new and the carb is a newer edelbrock performer 550. Float height is set, needles are adjusted, ignition timing set, valve clearance adjusted and all orifices in the carb are unobstructed. I also have an insane smoking problem on the driver's side bank (5-8), but not on the other side. I can say this with confidence as the previous owner flipped the exhaust manifolds and welded tractor mufflers on to the end. So I basically have the exhaust shooting up where the hood will be soon. I appreciate your input.
Thanks
Thanks
When first installing my 4100 a check for vacuum leaks using carb cleaner and propane around base didnt show anything. Using a diner ketchup bottle to squirt gas around base gasket(s) showed many significant leaks.
An automatic choke improperly adjusted, or not pulling off, or generally not working well can produce a rich mixture. That will cause smoking due to rich mixture and oil wash from cylinder walls.
Edit: Given the weird location of the exhaust, the use of any flammable material to check for leaks may be hazardous.
Thread Starter
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7th Gear
Joined: Jan 2012
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The carb installation is apparently when the problem started. The previous owner did the installation. I read through the instructions and it looks like they were followed. I ran through the manual for it and I can't find anything that could be helpful.
When you give it gas you have to come into it slow or it dies. I just used carb cleaner to look for leaks.
When you give it gas you have to come into it slow or it dies. I just used carb cleaner to look for leaks.
Postmaster
Joined: Jul 2003
Posts: 2,688
Likes: 4
From: Southern Oregon
First thing is I am not very familiar with Edelbrocks. But most all carbs have accelerator pumps, and this sounds like a possible culprit. Worn or incorrect pump diaphragm, missing check valve, clogged pump circuit.
Fairly recently I had one side of a Ford 2V nozzle which wasnt working. Found a very small piece debris which at been loosened during cleaning, clogging the .030 in. passage. Easy fix.
Fairly recently I had one side of a Ford 2V nozzle which wasnt working. Found a very small piece debris which at been loosened during cleaning, clogging the .030 in. passage. Easy fix.
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Cargo Master
Joined: Apr 2003
Posts: 2,389
Likes: 58
So then it hasn't been running right since you've owned it? I wouldn't believe anything the previous owner said and do a diagnostic check of everything, compression, ignition, fuel system, mechanical condition of the engine.
Pull a valve cover make sure the valves are still adjusted and look at the adjusting screws. Are they all at about the same height in the rocker arm? They should be. One that is in or out farther than the rest indicate a valve train problem. You will be able to see a difference if the issues are serious. No measuring device required.
More later...
Pull a valve cover make sure the valves are still adjusted and look at the adjusting screws. Are they all at about the same height in the rocker arm? They should be. One that is in or out farther than the rest indicate a valve train problem. You will be able to see a difference if the issues are serious. No measuring device required.
More later...
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7th Gear
Joined: Jan 2012
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I did the valves, compression test, and ignition system. The fuel pump seems to be working properly. I pulled the fuel line and turned the motor a couple time and its shooting fuel consistantly.
The accelerator pump is not something I had looked at. How can I test it? Just fill it up with fuel, push the plunger and make sure it comes out where its supposed to?
The accelerator pump is not something I had looked at. How can I test it? Just fill it up with fuel, push the plunger and make sure it comes out where its supposed to?
Cargo Master
Joined: Apr 2003
Posts: 2,389
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If it's working properly, it shouldn't need to be filled. Look down the primary barrels and push the throttle open. You should see fuel squirt into the barrels. If it doesn't, then there is either little fuel in the bowl or the pump plunger needs to be replaced. You would have seen it when you pulled the top off to check the floats. It's round, has a spring and is on the front driver side of the carb if I'm remembering right.
The fuel pump is kinda hard to check. An easy way to eliminate the entire fuel system is to use a remote fuel supply. There are products made for this but you can do it carefully with a funnel and length of rubber hose. You just hold it higher than the carburetor, fill it with fuel, and run the engine. If the problem goes away, it's something before the carburetor causing the problem.
When you have the cap off of the distributor, can you see any advance springs?
The carburetor may be too big. A 550 is a big carb for a stock engine.
The fuel pump is kinda hard to check. An easy way to eliminate the entire fuel system is to use a remote fuel supply. There are products made for this but you can do it carefully with a funnel and length of rubber hose. You just hold it higher than the carburetor, fill it with fuel, and run the engine. If the problem goes away, it's something before the carburetor causing the problem.
When you have the cap off of the distributor, can you see any advance springs?
The carburetor may be too big. A 550 is a big carb for a stock engine.
Mountain Pass
Joined: Nov 2011
Posts: 225
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on the exhaust i think he means original truck manifolds.
it's a crossover system from the factory. 'arm burner'
the drivers side has outlet at front and it dumps up.
the passenger side has two 'outlets'.
one at front faces up to connect to crossover.
then the rear outlet dumps like regular manifold.
i'll post pic's tomorrow.
Have A Nice Day!
it's a crossover system from the factory. 'arm burner'
the drivers side has outlet at front and it dumps up.
the passenger side has two 'outlets'.
one at front faces up to connect to crossover.
then the rear outlet dumps like regular manifold.
i'll post pic's tomorrow.
Have A Nice Day!
Senior User
Joined: Oct 2008
Posts: 264
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From: Rockwall TX
check the distributor. mine was running really bad and if you didnt eais into the trottle it would spit and sputter and die. also try reving it up with your timing light on it and see what it does. if its running that bad im just guessing but i think you would be able to hear a vacum leak if that was the problem, thats what ive always seen. oh one last thing im sure you already have but check your fuel filter and make sure its not just completly plugged with rust or dirt.
Mountain Pass
Joined: Nov 2011
Posts: 225
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here's pic's of exhaust
1964 F100 292 Cruisomatic
F100 Exhaust Pic's - The Ford Barn
Have A Nice Day!
1964 F100 292 Cruisomatic
F100 Exhaust Pic's - The Ford Barn
Have A Nice Day!
Cargo Master
Joined: Sep 2007
Posts: 2,095
Likes: 2
From: Wahpeton ND
A 550 is an awful big carb on a 292. Try a vaccum test at idle. If it is below 15 I would start there.
Also the most likely reason for smoke would be worn valve guides or bad rings. If a accelerator pump was leaking by you would have an excessivly rich condition. No?
BTW, The squirt bottle of gas idea is great. Thank you 46Y.
Also the most likely reason for smoke would be worn valve guides or bad rings. If a accelerator pump was leaking by you would have an excessivly rich condition. No?
BTW, The squirt bottle of gas idea is great. Thank you 46Y.
Mountain Pass
Joined: Nov 2011
Posts: 225
Likes: 0
try this again.
pictures of exhaust to see if this guy's are the same.
1964 F100 Exhaust Pic's - The Ford Barn
Have A Nice Day!
pictures of exhaust to see if this guy's are the same.
1964 F100 Exhaust Pic's - The Ford Barn
Have A Nice Day!