351W puttering
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Senior User
Joined: May 2001
Posts: 198
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From: Baltimore USA
351W puttering
Ok, I've got some more info on my engine problem. Currently what I had was it attempting to stall when in gear before operating temp was achieved.
Just after starting up the truck, I tried flooring it in park a few times. This produced two "putters" before the engine would rev to life. Seemed the lower the rpms it was idling at, the more likely it would putter before revving. I haven't had the chance to look for a vacuum leak possiblity. Somebody had also mentioned retorquing the carb and manifold bolts. I'm going to try all that stuff soon. If that is a possibility, could it also be a blown gasket?
Just after starting up the truck, I tried flooring it in park a few times. This produced two "putters" before the engine would rev to life. Seemed the lower the rpms it was idling at, the more likely it would putter before revving. I haven't had the chance to look for a vacuum leak possiblity. Somebody had also mentioned retorquing the carb and manifold bolts. I'm going to try all that stuff soon. If that is a possibility, could it also be a blown gasket?
Senior User
Joined: Nov 2001
Posts: 144
Likes: 1
From: Savannah US
351W puttering
Sounds like the timing is off or the carb needs replacement or rebuilding.
"Don't Laugh At This Truck Mister, Your Daughter Might Be In Here!!"
'78 F250 4x4/351w/NP435/NP205
lifted/"35 mudders
'78 F100 2wd/360/C-6/"9 inch
4bbl int+carb
"Don't Laugh At This Truck Mister, Your Daughter Might Be In Here!!"
'78 F250 4x4/351w/NP435/NP205
lifted/"35 mudders
'78 F100 2wd/360/C-6/"9 inch
4bbl int+carb
Postmaster
Joined: Nov 2001
Posts: 3,351
Likes: 1
From: Escondido, CA
351W puttering
Before you pull the carb, check the choke and float level. What kind of carb do you have? Holleys are easy to reset. If you have some gunk on the needles and seats it will prevent the float from doing it's job. I had to pull my needles out and clean them off. Then reset the float level. Made a world of differance. The way you check for stuck floats is look down the barrels of the carb after it stalls. If you have a mass amount of fuel on the throttle plates you are getting too much fuel. Which is in turn starving your engine for air. Go to www.holley.com and look under the tech specs for setting your float level. If your choke plate is open too much you are starving for fuel. Too check for this run the engine around 2000 rpm. Does it still putter and want to die? Adjust the choke plate until it runs on its own. Then let the engine cool again and check to see if it is set right. You may end up doing this a few times to get it right.
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Chris Henley
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
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Jan 23, 2013 09:38 AM
