Question about 1985 Ford F150

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85 ford f 150 hard to start when cold

I just installed new one barrel carb air fuel mixture is nit extactlly right it smokes a little but the truck runs graet be sides the smoking in the morning it is really hard to start the rest of the day it starts just fine what can i do.

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  • mtalbot1978 Jun 29, 2009

    thanks dude ill re check my plugs again it didnot fave this problem before i changed the carb

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Well it could be that you need new spark plugs definatly new piston rings hmmmm was it hard to start before you put the new carb on?

Posted on Jun 29, 2009

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My 91 Dakota starts hard and runs rough for a while and the check engine light stays on (no one around here has an analyzer for this year). After running a few miles you can shut it off and start it back...


Probably you have a lean fuel mixture for cold start up and running, but performs normal when the engine has reached operating temperature. So check all items responsible for fuel mixture such as fuel pressure and flow, air leaks ( use a smoke machine for this) choke system ( if carburetted) , engine coolant temp sensor.

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Have 82 ford truck f150 runs for abut 5-15 mins than dies getin gas chang full pups two times same thant runs and die


Hmmm...maybe piston ring failure, valve seal failure, rich air/fuel mixture or maybe a head gasket (however that is normally white smoke due to coolant burning instead of oil). If it's so dark that it's almost blue then I can tell you that somehow oil is getting into the cylinder and burning alongside the air and fuel. Your best case scenario is that the engine is running rich (Rich:Too much fuel, Lean:Too much air) and the smoke is a dark grey to black color. CAUSES OF SMOKE

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I have a 83 ford ranger 2.3ltr 4cyl 3years ago i replaced the engine with a rebuilt engine with 40,000 miles!the truck has been sitting for atleast 2years i go out a start it and let it run once a...


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Black smoke is RICH MIXTURE
White smoke is WATER (head gasket).

I would take it to a garage and get it tuned up, timing, and carb adjustment for mixture. You need an exhaust sniffer to best do that.

If you have far too much fuel in the cylinders, it can seep past the rings under pressure. That much fuel would make it run rough and contaminate the oil.

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====
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It is probably creating BLACK tailpipe smoke ... that means unburnt gasoline. (Blue smoke is OIL, white smoke is WATER).

Put the parking / emergency brake ON.
1. Remove air cleaner assembly from intake, use a carb cleaner spray or throttle body spray cleaner and spray just a little. (AutoZone $5)
2. Find the accelerator2.gif arm under the hood.
3. start car, rev the engine to make sure how to operate the accelerator from under the hood.
4. Carefully spray into carb / throttle body and work the accelerator ... don't let the engine die...
5. Watch out for "backfire"... it may create a small flame out of the carb. It will extinguish itself in one second.

6. You may need to do this two, three times.
7. Add a "complete fuel system2.gif cleaner" to your next tank of gas ($8).

That's it! ... pretty cheap, too.

Hope this helps!

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