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mark houghton mark houghton is offline
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Join Date: Jul 2008
Location: Central Washington State
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Originally Posted by DeFreest View Post
The fuse holder in the engine compartment. The middle fuse was the problem. Blown. I forgot all about those fuses.
So the frequency valve is another emissions add on? What do you have to change to remove this PITA valve?
Beyond my knowledge. Since that freq valve controls fuel flow from the lower differential chamber back to the gas tank, for those of us running open-loop (O2 sensor disconnected) the freq valve will stay at a constant duty cycle...something like opposed to modulating in response to the lambda computers' direction as it sees the O2 content of the exhaust gasses changing. Thus, in open loop it's fixed and never changes.
Makes one wonder if a simple flow regulator of sorts - set up to match the flow the freq valve allows when at fixed duty cycle- would suffice and take out the electrical failure potential of the freq valve?
Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, stock everything else. The result of a massive Pelicanite good will fire recovery effort. Truely an open book, ready for the slippery slopes to modification.
Old 04-18-2013, 05:35 PM
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