even in park/neutral, when I jump on the gas, the egine hesitates and stumbles before taking off. it idles OK before that.

I have a 67 vert, new crate 350 FB385 and a speed demon 650.

Any ideas?
thanks!

The Speed Demon carb, adjust all 4 idle mixture screws out equally to 1 1/4 turns.

Test drive, if it stumbles, try backing them out another 1/4 turn or so...if that doesn't work go the other way...I've found they are sensitive to that, and will cause hesitation.



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Don~ ZZ430DropTop (http://hometown.aol.com/zz430droptop67rs)
~~~~and~~~~
70 RS/Z28 (http://hometown.aol.com/performancespecs)
67 RS/SS Convertible, 70 RS/Z28

I'm in no way an expert here... by my 327/210 factory stock 1969 had the same problem. I changed my dirty air filter and now she drives like a dream again.

I was having the same problem with my 750 holley. Check to see if you have a steady stream of fuel going in every time you give it gas. I adjusted my floaters a little higher and it went away. What I did is went and found a road nobody uses. I then stopmed it to see how to adjust the floats. And went up quater turns on the front and back. Then stopmed it again then adjusted and did this till I got it to work the way I wanted to. For some reason when I adjust the float levels to be under the sight hole it runs crappy. See my post on engine and drivetrain section.

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1979 - 305ci
Holley 750cfm Vacuum Sec.
Edelbrock Performer Intake
Summit 48,000 volt Coil

[This message has been edited by 4U 2 NV (edited 07-30-2002).]

Forget the carb brother. I had this problem in mine. I thought the car was dead. Until I checked the timing properly. You won't be sorry.

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1978 Z28 350 4 speed 3:73's.
http://www.cardomain.com/id/greenhornet350