Re: rough idle/acceraltion

Posted by Ken Bigham on May 15, 1997 at 07:06:55

In Reply to: rough idle/acceraltion
posted by Ken Bigham on May 11, 1997 at 20:33:41

Gentlemen:
Thankyou for your replys.
For the record, the manifolds were milled together as was the block freshly milled, the manifold also had been retorqued to make sure it was "tight".However,I had installed the gasket "dry" as I didn't want GOOP showing around the manifold when I showed the car. Last night I removed the gasket and placed a sufficient amount of Hylomar gasket sealer on both sides of the gasket.....The problem is resolved.
Again, thanks...
Ken
: I'm hoping someone out there has a suggestion to help me with a problem i'm having.
: My engine has recently been rebuilt. 30 over all the ususal
: balanced, adjustable tappet, hardened valve seats etc.
: My problem is that I have been unable to get the motor to run
: smoothly. It starts easily, but requires that the fuels mixture
: be turned open 3-4 full turns. At that stage it will run and
: accelerate well. Any less and the engine, bucks and will
: not accelerate.
: The timing is correct as far as I can see. I have tried 2
: Zenith carbs and 1 x aftermarket carb which runs the best of the three. I've checked the fuel flow which is adequate
: and have even blocked off the windshield wiper vacum.
: The engine just seems to be running like it has a vacum leak.
: The manifold was milled and there were no apparent cracks.
: I've also retightened the manifold...all to no avail.
: I really think it is carb or intake manifold related.
: On the road the car runs o k,does not overheat etc...
: but just will not run at idle. The air screw on the carb is currently 1/8 open. Opening the screw kills the motor.
: I know that the engine is very tight..spec wise, and maybe this will improve after breakin...
: I appreciate any help or advice.
: Thanks in advance.
: Ken

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