V6 (1994-2004) Mustangs Technical discussions on the 3.8L and 3.9L V6 torque monsters

Electrical problems

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Old Jan 9, 2010 | 10:39 AM
  #11  
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just went and looked and occurding to the book the eec, and fuel pump fuses are blown. hope this helps
Old Jan 9, 2010 | 12:40 PM
  #12  
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then your fuel pump might be bad, sounds like whatever dealer you went to just wanted to try all of the most expensive parts first, i.e. the ones that NEVER fail. A fuelk pump is cheap, hell an svt focus pump is only $100 and it drops right in.

Check all your electrical connections make sure there isn't corrosion, use baking soda and water to clean them. Replace the blown fuses and see what happens. If they don't blow again, then problem solved. If they do blow again, I recommend upgrading your fuel pump ground wire and grounding to the chassis.
Old Jan 9, 2010 | 01:34 PM
  #13  
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ok ill try that for the fuel pump. but wat would cause the eec fuse to blow, along with the theft light to be blinking. the car rolls over but no spark nor fuel.
Old Jan 9, 2010 | 04:08 PM
  #14  
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the eec controls the fuel pump and the pats system.
Old Jan 9, 2010 | 10:31 PM
  #15  
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ok i have found the solution it is the rear O2 sensors, i put mil eliminaters in for my off road xpipe. i unpluged them and it was a miracle i heard my fuel pump prime. my car has been sitting for a while. lol ok one question,since i have an offroad pipe will not havin the rear o2 sensors pluged in, cause a problem?
Old Jan 9, 2010 | 11:28 PM
  #16  
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If you have MIL's then it shouldn't. Best thing to do is get a programmer and turn the rears off. They're only there to comunicate with the fronts to insure the cats are working.
Old Jan 10, 2010 | 02:41 PM
  #17  
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well i have bad news, went out and started my car and two of the freeze plugs are popped out the ones on the block
Old Jan 11, 2010 | 07:27 PM
  #18  
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any help on freeze plugs?
Old Jan 11, 2010 | 10:29 PM
  #19  
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put in some new ones. Are you running the propper coolant mixture? Did your block "freeze"? JThorn just blew one or two out of his 5.0 for no apparent reason. It's not common, but it happens.
Old Jan 14, 2010 | 12:16 AM
  #20  
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nope sadly i didnt have hope for the stang, so i didnt check the coolant. it hardley ever freezes here.
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