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2003 Sable GS intermittent miss above 3K

  #1  
Old 03-15-2016, 10:25 AM
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Join Date: Sep 2011
Location: Colorado Springs, CO
Posts: 4
Angry 2003 Sable GS intermittent miss above 3K

Have been searching forum for answer - I have a 2003 Sable GS V6 with 44,000 miles which runs like a gem till I try to accelerate over 3000 rpm and then engine will cut out and in till I back off below 3000 rpm. I have NO CODES I have replaced ignition power pack, mass air flow sensor*and checked for blocked catalytic converter. Gas mileage has dropped from 30mpg to about 25 mpg. Plugs have about 10K on them. Air Filter changed. Your thoughts?

*Today (next day) I changed out the Mass Air Flow Sensor ($100) and it made no change to my problem....NOTE a specialized AutoLight T-15 torex bit is required unless you choose to break the center pin off the two screws (another STUPID Ford idea for self repair)

Can a injector fail like this? On my 1994 Sable I had an injector failed and replaced with no issue other than a pain to reach.
 

Last edited by mrrotary; 03-16-2016 at 04:47 PM. Reason: update
  #2  
Old 07-05-2016, 05:34 PM
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Join Date: Jul 2016
Posts: 9
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Most ECUs change the way they decipher engine parameters somewhere around 2500-3000 rpm. If its consistently happening at 3k, you may have a bad sensor, or maybe a bad connection somewhere. Sometimes a sensor will go bad and still be throwing a good signal. By good, I mean within the normal range. It may be way off, but still normal. For example the temp sensor may be stuck saying it is reading coolant that is 80 no matter how hot the engine gets. Normal signal, but still wrong. I don't know enough about these new Ford ECUs to say which sensor could be suspect, so I hope this was at least a good read for you.
Gator
 
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