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Volvo 940 230fd and little bit too high fuel consumption 900 1992

uid 46171's pic
posted by  kittysgreyvolvo on  Sun Dec 6 11:36 CST 2020
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last visit: Sat Oct 18 15:23 CST 2014
[RELATED]

You 1992 940 has a Schrader valve on the fuel rail used to check pressure.

Not a Turbo, yes?

You blocked the Pulsair ports? Can you do that and pass emissions inspection?

Do you have EGR? Pulsair is sometimes included with EGR.

So you have Bosch fuel injection. Your 1992 940 should also include on board diagnostic to check for engine control faults, typically attributed to emissions sensor or device faults.

https://www.brickboard.com/FAQ/700-900/EngineOBDCodes.htm

Read more in the FAQ

My guess is that the fuel pressure regulator (FPR) may be failing. The FPR can get stuck and not return fuel pressure to normal. When you want to go fast, and press down on the fuel pedal, the air intake port manifold vacuum lessens causing the vacuum controlled FPR to reduce fuel volume passing through it, raising fuel pressure at the fuel injectors. The FPR can fail in a few ways. One way is the vacuum diagram is punctured and fuel passes through the vacuum line imnto the air intake. Yet you'd smell fuel in the engine bay.

--
Beh.






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