Question about 1985 Ford F 250
1st thing to check is the fuel pressure , most carbs have to have a constant 12 psi supply in order to work , they'll idle on lower but will starve out when more throttle is added (pumps and filters)
second thing what model carb did u use ? reason I ask is some models require two fuel inlet connections , the former carb might have only had one that would lead u to believe new one only needs one as well , this may not be true
last but not least : out of the box carbs are set to basic settings as far as jetting goes , some fine tuning is expected to do by installer for perfect calibration of A/F ratio in all throttle settings
Posted on May 20, 2015
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Posted on Jan 02, 2017
check all spark plugs and wires also check mass air flow senser located on intake tube if all is still in good working condition check the throttle position sensor if that is good then it may be your fuel pump please update when possable.
Posted on Aug 07, 2009
i guess it has carbs on that year, which means
1.your main jet is blocked or
2. fuel filter is clogged,
3. fuel pump worn out
4.blocked fuel line
you simply have just enough gas to idle but when you demand more there just is not enough,
Posted on Dec 05, 2009
SOURCE: 1984 F150 won't idle
It sounds to me like there is still a pretty good vacuum leak somewhere, and you should also check for any dis-connected or missing vacuum lines on the intake manifold, at the carburetor, and the large vacuum hose to the brake booster unit and the vacuum valve at the brake booster unit for any vacuum leaks or broken vacuum lines/hoses, and they can be hard to find because cracks in the vacuum hoses like to hide on the under-side of the vacuum lines/hoses especially the hard plastic ones. Also the carburetor could be loose or the carburetor base gasket could be damaged, the EGR valve gasket could be damaged, or the intake manifold gasket could be damaged, and these are all the most likely places to suspect a major vacuum leak.
Posted on Jun 02, 2010
thats the electric choke. It warms up the engine so that it will idle properly. It may be sticking. Personally i hate the things and just remove and just hold my foot on the gas a bit when cold starting.
But check and see that the solenoid is not sticking and that the other valves on the carb are not sticking some wd-40 should help.
Posted on Nov 07, 2010
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