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Old 10-15-2004, 02:36 PM
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sec. Jet height.

Doc here

Had something like that before on my Vette...It kept failing smog on the low speed dyno pull, but was good at high speed dyno..

Turns out the secondary Needle Hanger (part #12 on the photo)was bent (both rods wern't at the same height) so when it was seated on one the other was passing fuel.

I assume the stock air cleaner had something to do with the deformation, since after I got the needle hanger level again, and installed an eldebrock air cleaner, it never happened again...and It passed smog after...and got much better mileage!

Just a thought..

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