hey
do those power boost valves work on Single point injection cars? got a honda civic LSI 1.5 SOHC, they sell a PBV for my car, but i got a funny feeling they dont work very well with SPI/at all.
any info? thanks tim draper
no
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If you replace your injector with a bigger one (higher flow), and remap your ecu to suit the higher flow, the Power Boost valve will stop things leaning out, but not on astandard engine.
Do they "work" ?
A Power Boost Valve simply increases your fuel pressure. It will only "work" if you need it to ! If your car is highly tuned, and running lean, then a Power Boost Valve can help.
They can give a non linear increase according to vacuum, so can richen the mixture under acceleration but not have much effect at cruise.
They improve the early Rover V-8 EFIs which have a tendency to run lean. But I'd not expect them to work well on a more modern system.
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