rough idle
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Junior User
Joined: Aug 2002
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From: naples usa
rough idle
My 351W Bronco has a somewhat rough idle. There's no stalling at any speed including at idle. In acceleration or top speed, I notice no perceptible missing or sputtering, rather, it's smooth as silk. The idle is slightly rough when I start my cold vehicle and gets progressively rougher as the engine temperature increases. I have changed my distributor, rotor, cap, wires, and plugs. Could this be a carburetor or vacuum leak issue? My rebuilt carb is the stock 2 barrel installed 3 years ago. This roughness has been going on for 6 months with no increase or decrease in symptoms so I do not feel it's a bad tank of gas. Can anyone help here?
Thread Starter
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Junior User
Joined: Aug 2002
Posts: 54
Likes: 0
From: naples usa
rough idle
Hi Vampiro,
I had my mechanic check out the rough idle problem. He told me that he felt the idle was as smooth as it can get for a carbureted vehicle and that I was too "****". He did check for vacuum leaks, timing, and checked the carb adjustments and found nothing wrong. Thank you for your help.
I had my mechanic check out the rough idle problem. He told me that he felt the idle was as smooth as it can get for a carbureted vehicle and that I was too "****". He did check for vacuum leaks, timing, and checked the carb adjustments and found nothing wrong. Thank you for your help.
Elder User
Joined: Jul 2002
Posts: 526
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From: USA
rough idle
sounds like you need to get yourself a new mechanic. after i got my intake on i found out my dist was frozen, took it to my mechanic and he replaced it for like 75 bucks. i have no air leaks, as far as i can tell and my truck runs very smooth. having never bought a carbed vehicle new i dont know what they are like from the factory but my dad said my truck runs like our old van did when it was new, a 78 E350 with the 460 C6 and he said that was smooth.
once i saw a cadillac, i think it was a 64, all orig with about 60k miles on it for sale, when the guy started it up that engine didnt even budge. i put my hand on the valve cover and i could barely feel movement at idle.
1977 F250 460
C6 Hedman Headers
Dual 40 series
edelbrock performer
holley 4160
msd 6a and blaster coil
once i saw a cadillac, i think it was a 64, all orig with about 60k miles on it for sale, when the guy started it up that engine didnt even budge. i put my hand on the valve cover and i could barely feel movement at idle.
1977 F250 460
C6 Hedman Headers
Dual 40 series
edelbrock performer
holley 4160
msd 6a and blaster coil
Thread Starter
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Junior User
Joined: Aug 2002
Posts: 54
Likes: 0
From: naples usa
rough idle
I hear you on the new mechanic. If it is the carb, maybe I can live with it for a while more. I plan on throwing on a Edelbrock 1406 (and appropriate manifold). Seems to be a popular carb for the street.
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