Question about 1981 Ford Bronco

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I have a 1981 ford bronco 351 with a holley carbureter ive had her for 10 yrs ever since i had motor pulled out at a ford work shop specialist for motor repairs 2 yrs ago & it came back as a black motor instead of color it was blue & since then hasnt got the power wen i put the gas on takes a long run for her to get up & go im thinking mabe my motor was swaped with another one how can i findout if that was done

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Have a ford dealer run your vin number and see if the motor is the original. It should have a tag on the side somewhere.

Posted on Oct 09, 2010

Testimonial: "thank u so verymuch for ur help ill be doing exactly that check my vin on my moter from my vin plate on chasie.then wen all sorted ill mesege u "

  • tewata351bro Oct 10, 2010

    im the person with bronco motor i think was swaped could u tell me if motor was swaped without my authority where do i stand legaly to have thier motor taken out

  • tewata351bro Oct 10, 2010

    another problem since black motor was put into my bronco is she heats up real easily at the radiater

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I just bought a 1981 bronco and the vin code said it has a 351 windser but it has a 351 modified and from every thing i read they did not use the modified in 1981 also i was told it would be vary e-z to...


you will have to remove the motor, pull oil pan replace crank and change the push rods and cam but if your are going that far why stop for just that little bit you might as well go and pull he heads have them port and pollished add headers and new high rise intake and bigger carb the remove the oem fan and water pump buy a electric water pump and electric fans to mount on the radatior.

Feb 05, 2011 | 1981 Ford Bronco

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Should I rebuild my Ford Bronco 351 Windsor Holly 4 bbl carb or replace it with an Edelbrock carb?


In all my experience, if you know how to correctly tune a edelbrock then go with that, but, holley has outstanding carbs that can muster up to an output of 1,200hp. it would be much cheaper to et a rebuild kit from say, o'reillys, 20-45 dollars depending on which one you have.
I have a 1985 Bronco 351w 4x4, i just rebuilt my holley and she runs smooth

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1 Answer

Need schematic for vacuum lines on 351 clevland


try auto zone.com they have had most of what i have had to search for .....mrdmburns@cableone.net good luck..DALE

Aug 28, 2009 | 1981 Ford Bronco

1 Answer

1981 ford bronco failed emissions twice


Look behind the motor, next to the firewall. There's a vacuum check valve that keeps the air gulp pump from pressurizing the crankcase. Mine was shot; had the same symtoms. Also, make sure that the EGR valve is closing at low idle.

You don't need an engine light to check the codes. First, do a KOEO (key on, engine off), but, let me tell you, when this happened to me (1986 Full size with 302 EFI, multiport injection) NOTHING showed up. No one, not Ford, not emission specialists, nada, knew the vacuum check valve existed.

By the way; are you getting motor oil in the air filter housing?

Jun 03, 2009 | 1981 Ford Bronco

1 Answer

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with the shorting plug removed at the TFI ignition module the timing is set to 10 BTDC on both engines.

Apr 13, 2009 | 1989 Ford Bronco

1 Answer

I have a 1975 Ford Early Bronco that has been sitting for 20 yrs


Change plugs & wires, New battery , Install radiator. Crank it over if it starts and is smoking needs new vale guide seals and maybe new rings. But try to get it started first then go from there. If it wont turn over try to turn over by hand from front crank pully with socket and breaker bar to free up motor.

Mar 30, 2009 | 1981 Ford Bronco

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Engine wiring Diagram for a 351 cleveland


have you gotten an answer for the wiring on your 82 ford bronco w a 351C? i have the same problem putting a 351C into my 81 ford bronco

Mar 13, 2009 | 1981 Ford Bronco

1 Answer

1989 BRONCO XLT WITH A 5.8 351 CLEAVLAND


The Bronco did come with the 5.8L. It's a 351 Windsor though. Ford quit making the Cleveland engine back in '74. You should have a vacuum diagram under the hood of your truck.

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Check for timing gear problems. They have plastic teeth on the cam shaft gear which will shatter causing it to jump time.

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