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

Fuel Pressure Regulator

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Old Jul 25, 2005 | 09:35 PM
  #1  
SChema's Avatar
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1988 Turbo II
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Fuel Pressure Regulator

I'm not sure if anyone has covered this but;
what are some good indications of a bad FPR?
and what are some symptoms of an FPR going out?
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Old Jul 25, 2005 | 09:57 PM
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1988 Turbo II
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From: Oklahoma
I'm leaning towards a fuel problem, the car wants to just idle, I can barely raise the RPMs above 1500. i've got good fuel pressure, had the injectors cleaned, replaced the fuel filter, and I couldn't see any fuel leaks either.
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Old Jul 26, 2005 | 01:13 AM
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- Make Haste -
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From: Calgary, Alberta
i had a simular problem, might wana check your fuel pump, it might be dying....
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Old Jul 26, 2005 | 06:44 AM
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Originally Posted by FC3STurboII13B
I'm not sure if anyone has covered this but;
what are some good indications of a bad FPR?
and what are some symptoms of an FPR going out?
Install a fuel pressure gauge, and it'll be obvious.


-Ted
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Old Jul 26, 2005 | 08:26 AM
  #5  
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HAILERS
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From: FORT WORTH, TEXAS,USA
Originally Posted by FC3STurboII13B
I'm leaning towards a fuel problem, the car wants to just idle, I can barely raise the RPMs above 1500. i've got good fuel pressure, had the injectors cleaned, replaced the fuel filter, and I couldn't see any fuel leaks either.
Your confusing some of us. You just stated you have good fuel pressure. If you have good fuel pressue the fpr is good. Tapping in a fuel pressure gauge like was stated above is the only way to know for sure.

At idle the pressure should be about 28-30psi and if you idle and pull off the vacuum hose from the fpr the pressure should be about 37-39 psi.

If it idles fairly decently and won't rev above 1500 it might be a corrupt tps. Disconnect it and try again.

You real sure your sparkplug wires are on right? Your timing is spot on? Using a timing light?
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Old Jul 26, 2005 | 11:37 AM
  #6  
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1988 Turbo II
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From: Oklahoma
I checked the fuel pressure before the FPR, while the car was off. I have checked the spark and I had decent spark too. The TPS though, I ran a couple of tests from the book. The TPS ohmed out fine and it swept fine through opened and closed throttle. There could be something else that I;m missing. I'm pretty sure the timing is fine, because it was driveable before; I was driving when this started to happen. The car was fine up to that point.
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Old Jul 26, 2005 | 05:12 PM
  #7  
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From: Oklahoma
There isn't a "limp-home" mode on RX-7's right?
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Old Jul 26, 2005 | 05:56 PM
  #8  
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From: FORT WORTH, TEXAS,USA
Only on series five. None on series four that I'm aware of.
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