The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Terrible idle, difficult start, and smoke!

i82much · 10-20-2016, 11:08 AM

Definitely check your float level first and see if it can hold the fuel level steady. If that needle valve stays open, your carb will pump raw fuel into the engine.

Also, if that fails, check your vacuum lines, especially your PCV.

10-20-2016, 11:08 AM	#13
i82much Registered User Join Date: Jul 2008 Location: Bowie, MD Posts: 313	Re: Terrible idle, difficult start, and smoke! Definitely check your float level first and see if it can hold the fuel level steady. If that needle valve stays open, your carb will pump raw fuel into the engine. Also, if that fails, check your vacuum lines, especially your PCV.