I wouldn't buy them for mileage. They're not a bad price, though, so if you buy them you're not losing money.
KrisW said:The fast idle cam allows the engine to warm up faster. After it's warmed up, your engine should fall down to the normal idle circuit.
It comes on before you start the car (you're assumed to pump the carb once before starting) after you pump it. Then it won't be allowed to fall until the choke opens and allows the latch to open that holds the fast idle cam step up.
If your engine isn't warmed up and it's cold outside, your engine might stumble until it's warm.
megaladon6 said:it may improve performance a little, mostly from a better advance curve. however they have found that if you have a strong enough spark that it is not blown out, then haveing more energy won't accomplish anything. look at it this way, if a match can ignite a room filled with gas and air do you need a blowtorch?
gotchamegaladon6 said:assuming that it's functioning properly, then no. i would check the gear and the weights and springs, yada yada yada... when you drop it in, make sure that it's the only change you make. this way if the car won't run or runs badly (and adjusting the timing doesn't correct it) this way you know what's causing the problem.
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