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2004 - 2008 Ford F150 General discussion on the 2004 - 2008 Ford F150 truck.

Baffled... What next

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Old Mar 25, 2022 | 04:50 PM
  #11  
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Try unplugging the ignition noise suppression capacitors (at the front of each head wires in with the coil power wires)
I have read it's possible for one to fail with a short to ground then you get no bueno spark.
You should be able to just unplug them both to test.
They are kind of in front of the head by the serpentine belt.
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Old Mar 26, 2022 | 12:59 PM
  #12  
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Default No Bueno

I'm getting spark but it's real weak.
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Old Mar 27, 2022 | 11:06 AM
  #13  
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I put it on my buddies diagnostic it showed that the ignition and the O2 sensors weren't getting enough voltage.. When we put it on test mode it wanted to start so bad it could taste it .lol... Any thoughts???
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Old Apr 7, 2022 | 07:42 AM
  #14  
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Ray,
I recently ran across a 3.0L 2004 Ford Ranger that would not start. This truck has had an emissions related check engine light ON for years. The problem started when the owner ran low on gas and he thought it had run out of gas and the truck died. He added gas but no change. Fuel pressure was low at about 27psi so he replaced the fuel pump (and filter) and pressure now at 60 psi but still no start. Starting fluid no help. Now for the fun part - pulled plug #1 and held against ground to test for spark and it had spark but truck started on 5 cylinders with one plug removed. My mouth fell open. Reinstalled plug #1, no start condition returned. Removed plug #1, truck started, reinstalled plug, no start condition returned. Reinstalled plug #1 and no start condition returned, removed plug #2 and truck started, reinstalled plug #2 no start condition returned. Removed plug #4 and truck started, reinstalled plug #4 no start condition returned. The only conclusion I could reach was that somehow the engine was able to exhaust through the missing plug hole and this was a real stretch of the imagination. Pulled catalytic converters and the downstrean converter was packed with about 1 quart of debris from one of the upstream converters. Cleaned loose debris from all conveters reinstalled and truck started and ran fine with check engine light on, no working O2 sensors.
You need to checked for clogged catalytic converters
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Old Apr 10, 2022 | 04:43 AM
  #15  
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Jimboy..I will do that tomorrow I already checked the downstream ones and they were fine.. But I will check the up stream ones just to verify and I will let you know tomorrow. Thanks I really appreciate the help.
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