High RPM problem with Progressive Carb, Changed Seals, Changed Carb, No Help Options

[94teener]

Hey Guys,

I'm stumped! I helped a friend with his 1.7L powered 914.

The first thing I did was replace the pushrod tubes seals, they were leaking all over the place. When changing the seals, I didn't reset valve clearances but was very careful to
reinstall the rocker assemblies carefully. Upon start up, the engine ran smoothly with no
unusual valve noise.

On the way driving home, my friend said the engine suddenly begain reving to 3000 rpm
whenever he pushed the clutch in at lights or when shiftinig. The next day I found that the
clutch cable had not gotton intertwined with the accellerator cable. I found the intake manifold boots that connect to the intake runners were cracked and had several tears. His
car never ran too smoothly in the first place so I decided to pull the entire carb. and intakes.
I rebuilt a progressive carb. of mine to exchange with his, replaced the runner boots, the carb. base gasket and both runners to heads gaskets. I am quite sure that there are no
intake leaks from these newly gasketed places. I preset the carb mixture control one turn
out, set the throttle stop full back to just touching the stop and fired it off.

It started and ran smoothly and quickly right up to 3000 rpm with the throttle closed. What the heck has gone wrong here? I noticed that when I put a small twist to the throttle shaft, it would only drop the rpm by a couple of hundred rpms, max.

I don't think it is the carb. because the high rpm problem was present with the previous carb.

Could I have done something when removing and replacing the valve assemblies, in turn, when I replaced the push rod tube seals?

Any suggestions from the real experienced engine guys here? I would certainly appreciate
it.

Phil