Fuel Pressure Regulator

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08-16-2013, 11:44 AM

HlhnEast

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Fuel Pressure Regulator

Apparently my FPR hasnt been hooked up to any vacuum source. Where does it get vacuum from on an '85 L98? One of the ports at the back of the upper intake?

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08-16-2013, 12:42 PM

floridamale

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The FPR gets vacuum from the rear side of thr plenum just above where the FPR is located there should be 2 ports there.

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08-16-2013, 01:24 PM

HlhnEast

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Quote:

Originally Posted by floridamale

The FPR gets vacuum from the rear side of thr plenum just above where the FPR is located there should be 2 ports there.

Thanks! Thats what I thought. I have been trying to correct all the problems with this car as I find them. Its run fine for 5 years and I just finished the heads and found it.

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08-17-2013, 01:13 AM

Cliff Harris

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The front vacuum port of the two on the rear of the plenum connects to the fuel pressure regulator. If you still have your smog pump it also connects to the A.I.R. valves on the front of the engine.

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08-17-2013, 01:36 AM

vetteoz

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Quote:

Originally Posted by Cliff Harris

The front vacuum port of the two on the rear of the plenum connects to the fuel pressure regulator.

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