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Why does my 86 Bronco 2 run bad after heating up?

Tiny
M.HAYNES960
  • MEMBER
  • 1986 FORD BRONCO
  • 184,000 MILES
My 1986 ford bronco 2 runs great when started up. As soon as it gets up to operating temp it won't hardly even pull out. You have to downshift to first gear on even a slight upgrade. I have replaced the coil, plugs, plug wires, pickup coil, ignition module, distributor cap, and the cooling sensor. Nothing has helped. It has to be a sensor. I just don't know which one. Any help would be appreciated. Thanks.
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Friday, July 20th, 2012 AT 11:17 PM

1 Reply

Tiny
DRCRANKNWRENCH
  • MECHANIC
  • 3,380 POSTS
Here is a walk through diagnostic for your situation. As for code pulling, you don't have to have a check engine light on to have trouble codes. Also, test the fuel pressure. Advance Auto or Auto Zone will do this for free and loans out test tools. Just use the link below;

https://www.2carpros.com/articles/engine-has-low-power-output
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Saturday, July 21st, 2012 AT 12:06 AM

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