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Ford Tractors Discussion Forum
Order Ford 4000 Parts Online

4000 weak spark

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fnofjr

08-12-2017 14:08:09




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Ok here' we go my 61 4000 all of a sudden started to miss badly last time it did this I replaced the points and reset the gap however this time I did that with no improvement also replaced condenser, distributor cap, coil and spark plugs any ideas?




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russ1

08-12-2017 14:46:38




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 Re: 4000 weak spark in reply to fnofjr, 08-12-2017 14:08:09  
check the spark and fuel flow.



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fnofjr

08-12-2017 14:11:29




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 Re: 4000 weak spark in reply to fnofjr, 08-12-2017 14:08:09  
All parts came from TSC I have heard about new bad parts from TSC anyone have that problem



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old

08-12-2017 15:18:02




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 Re: 4000 weak spark in reply to fnofjr, 08-12-2017 14:11:29  
Yep TSC parts are China junk buy them for NAPA or O'Reilly's and buy good stuff. But try a bit of trouble shooting before parts next time
#1 check that you have a good blue/white spark at the center wire of the cap and at all the plug wires that will jump a 1/4 inch gap or more. If you have that go to #2
#2 pull the carb drain plug and make sure you have a good steady flow of gas that will fill a pint jar in under 3 minutes. #3 when was the last time you serviced the air cleaner??

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fnofjr

08-12-2017 15:34:15




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 Re: 4000 weak spark in reply to old, 08-12-2017 15:18:02  
Ok so now I have no spark at all have power going into coil but none at the distributor ,coil resistance is about 2.8 ohms but no power out to distributor



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old

08-12-2017 17:22:56




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 Re: 4000 weak spark in reply to fnofjr, 08-12-2017 15:34:15  
Pull the distributor cap of and dust cover and get the point to open and leave them that way. Then check and see if you have battery voltage with a meter at the coil. If the voltage you have is not close to the same as the battery disconnect the wire from the coil that goes to the distributor. Then check voltage at the ignition side of the coil a 2nd time. If you have battery voltage good chance the insulator in the side of the distributor is shorted out. Or you have something where the condenser wire or such hooks to the point shorted to the body of the distributor

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fnofjr

08-12-2017 19:09:03




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 Re: 4000 weak spark in reply to old, 08-12-2017 17:22:56  
OK so I found and repaired a ground short on the side of the distributor got the tractor running again but it still missing badly firing about every third time pop pop pop pop pop pop



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old

08-12-2017 19:28:13




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 Re: 4000 weak spark in reply to fnofjr, 08-12-2017 19:09:03  
Check point gap on all the lubes of the distributor cam. You could have bushings going bad in the distributor which can cause the points to open to wide in one place and not wide enough in another can cause it to run poorly



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fnofjr

08-13-2017 12:30:47




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 Re: 4000 weak spark in reply to old, 08-12-2017 19:28:13  
Thanks for the help finally figured it out one of the new condenser is I bought from tractor supply failed out of the box it was bad dug around in my junk found an old one now everything runs great no more parts from tractor supply



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old

08-13-2017 12:49:55




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 Re: 4000 weak spark in reply to fnofjr, 08-13-2017 12:30:47  
Yep TSC parts equals one pulling there hair out trying to figure out why it does not work like it should



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