When the FEV is cool it's closed(normal position)- needle is short, when power is applied it will extend,but slowly. Glad to hear you have throttle/power response now. With it not wanting to idle well at start-up then the FEV is probably the culprit. Tom w/SYC has written a great post about the quaility of these units- I hadn't given any thought about their quailty before his post, I purchased a new cheap china made FEV (pre-tested it before installation & it worked) and it didn't fix my problem, swapped it out with the original known working FEV and mine ran perfect, so there's definitely something to the quality made product. I think the cheaper made ones just don't extend fast enough & it takes several start-up attempts for it to work.
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