2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

loss of power above 3500 rpm

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Old Jun 30, 2005 | 10:56 PM
  #1  
rs_1101's Avatar
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From: OC
loss of power above 3500 rpm

see.. this should be simple right>? but since i did my motor swap ive noticed this. the car (s4na) surges at rpms above 3500 under full throttle. basically viewing my safc, the throttle reading blips down to 99.7% at random intervals, and this is really slowing my car down guys.

any ideas?

why would the throttle signal short out?
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Old Jun 30, 2005 | 10:59 PM
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From: Fort worth, TX
you could have a bad OMP. (oil metering pump)describe the symptoms more though.
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Old Jun 30, 2005 | 11:04 PM
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From: lebanon ohio
ya most of the time its a bad omp the same thing happend on my car but after i changed it was as good as new
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Old Jun 30, 2005 | 11:12 PM
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From: houston
Originally Posted by rs_1101
see.. this should be simple right>? but since i did my motor swap ive noticed this. the car (s4na) surges at rpms above 3500 under full throttle. basically viewing my safc, the throttle reading blips down to 99.7% at random intervals, and this is really slowing my car down guys.

any ideas?

why would the throttle signal short out?
99.7% is wide open, .3% of your position sensor voltage was lost for some reason. You have a different problem. i would look more toward your secondary injectors.
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