Question about 1984 Ford Bronco

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84 ford bronco 351 runs good till warm then wont crank till it cools down about 1 hour wat could be the problem

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It sound like you have a bad starter. When it is hot, it is drawing more amps than the battery can supply. You may also need to test the positive cable to the starter from the battery. To do this, you need a multimeter. Check the voltage between the positive and negative cable at the battery and note your readings. Then measure the voltage at the starter between where the cable connects and the case of the starter. Compare the two reading. If you have more than .5 volts difference, then the positive cable has too much resistance and needs replacing. Check for corrosion and make sure the cable is tight as well. I am betting on a starter though.

Good luck. Hope this helps!

Posted on Apr 09, 2011

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1 Answer

302 bronco stalls after it warms up and won't start till it cools down


I am guessing its your TFI or Thick Film Ignition module. Usually located on the underside of your distributor, its either grey or black in color and often when it is going bad it acts like this: Usually starts fine, runs ok for about 20 min then engine dies. cranking engine sounds normal but no start. checking spark will have no sparks. Leave hood up and allow to cool (also TFI very hot to the touch) I packed Ice around it once (in a ziplock) that made it run in about 45 min. NOTE: get ready to replace real soon because its on the way to breaking down.

May 09, 2014 | 1987 Ford Bronco

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Runs good two or three hours shut off will not crank tll it cools down


Have the battery tested and load test the starter to see how much current it draws, it may be the problem.

Oct 03, 2012 | 1987 Ford Bronco

1 Answer

Cranks runs good but wont crank after running a while then cools down and cranks it does not turn over on speed till it sets a while what could cause this


It sound like you have a bad starter. When it is hot, it is drawing more amps than the battery can supply. You may also need to test the positive cable to the starter from the battery. To do this, you need a multimeter. Check the voltage between the positive and negative cable at the battery and note your readings. Then measure the voltage at the starter between where the cable connects and the case of the starter. Compare the two reading. If you have more than .5 volts difference, then the positive cable has too much resistance and needs replacing. Check for corrosion and make sure the cable is tight as well. I am betting on a starter though.
Good luck. Hope this helps!

Apr 09, 2011 | 1984 Ford Bronco

4 Answers

I have a 1988 ford bronco full size xlt it is ideling low when u


I just had the same issue with my 88 xlt w/351 W it wound up being the MAP sensor and the timing. I would check both of these and see if it solves your issue.

Feb 17, 2009 | 1988 Ford Bronco II

2 Answers

Weak spark + 1988 ford bronco


check the voltage of the b+ terminal of the ignition coil (primary side) with a cheap multimeter while cranking. low voltage to the primary will cause low voltage on the secondary. also recheck all ground paths from the ignition module. ensure good connection from coil to module. note: new parts are not "known good parts" until it runs.--> IG.MOD.

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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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