5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Car seems as if it's hitting a rev limiter...

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Old 06-22-2009, 09:42 PM
  #21  
NoGo95GT
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Another possibility you may have is a bad fuel pump. You can temporarily hook up a fuel gauge to your window and run around block and see if your fuel drops. You can test the pump with a volt meter as well. Or your problem could be a bad FPR. Is your MAF clean? Again, these are all routes that I covered when I had this problem. Luckily all these things can be tested. Also, take out the TFI module and get it re-tested at Autozone just to eliminate that as a possible problem.
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Old 06-22-2009, 09:46 PM
  #22  
pastfast125
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I tested the fuel pressure a while back when I was having this problem and it was fine.
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Old 06-22-2009, 10:09 PM
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NoGo95GT
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Then I doubt it is a faulty fuel pump or FPR. Again, I'd get the TFI module tested and clean your MAF. Also, disconnect your MAF and see if it runs any better. Again, I am just trying to help you eliminate any problems.
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Old 06-23-2009, 01:07 PM
  #24  
pastfast125
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wtf, before I went for a drive I tested the Coolant temp sensor. I only have like 2 volts in, none out. Then when I got back with the car hot, I checked it again. This time I only have .5 volts reference and still nothing out the other side. Wtf is up with that?

I'm gonna get a new DMM in a bit cuz mine is cheap and acting screwy, and I'll check again. I think I'm gonna buy some o2 sensors while I'm there. I'll update in a while.
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