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Repairing stripped Idle Mixture screw hole in throttle body

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Cliff Ruggles:
Randy, call volume was INSANE last couple of weeks, might want to try again next week, hopefully things will slow down just a tad. 

I missed a lot of calls, and didn't get all the messages as it's often difficult to hear them on the answering machine.....Cliff

Reaper19:
Thanks Cliff, I called back and you have been very helpful listening to the problems and advising steps to try and correct. I went ahead and so far took out the mixture screws, IAB, and removed all vacuum hoses from the carb and sprayed carb cleaner through all openings before popping the top. I did notice some gunk come out of the mixture screw holes. I reconnected everything and set the mixture screws starting at 4 1/2 turns out to start and the IAB at bench setting.  After warming the engine up I set the timing again, this time a little higher from 6 to 8 BTDC which is where the engine builder felt the new cam liked best and set the dwell at 30 degrees using only the IAB for fine tuning. The car runs better at idle, and I was able to get that set around 675-700 RPM's with less of a miss or roughness from the engine, cruising and WOT are more responsive also. The idle is not silky smooth but better, so I'm going to see how things go, if the idle tubes may have a little gunk in them as you suggested, I'm hoping they may clear without popping the top.

If the engine idle does not keep getting better as I drive, I'll try to clean again and gradually turn the mixture screws out a 1/4 turn at a time if necessary up to 5 1/2 to try and smooth the idle out more. I'll get in touch again to order a new rebuild kit if things don't keep getting better.

Thanks again, what a great site, forum and service you are doing for us gear heads. Way to go Cliff!!!!!! 8) ;D

Cliff Ruggles:
Good news!....Cliff

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