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Old 09-27-2022, 03:22 PM   #21
geezer#99
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Join Date: Aug 2009
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Re: 1968 C2500 engine dying

Quote:
Originally Posted by gmc396 View Post
Can you explain the blocked crossover? Is this a passage in the intake manifold? If so, I assume I'd have to take the carb and intake off to take a look.

Also can you offer more detail on "idle ports are icing up"? So I should screw in the idle mixture screws while still maintaining a decent idle?

Thank you both for your suggestions.
The exhaust crossover is a passage that runs right under the intake from passenger to drivers side.
Easiest test for plugging is a temperature gun. Look for different temp on both ends. Plugged will show colder on drivers side. Check this with a cool motor.
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