knock/ping update - The 1947 - Present Chevrolet & GMC Truck Message Board Network

85 K5 · 12-06-2002, 05:44 PM

Ya know my choke was not up to par - acting funny. Sprayed some carb cleaner on the linkage while it was idling and noticed rpm went way down, almost died. No the cleaner did not go into the carb intake. It did go into the the intake at the base gasket, however. Tightened the carb mounting bolts (seemed pretty loose) and the idle again went down, almost died. Set the idle speed back up and I'll bet the knock/ping is also gone! Maybe the timing can be increased now. Just wanted to share this and hope it helps!

Just hope I didn't get them too tight. Only halfway out on the handle of a 1/4" drive ratchet. Can someone tell me does this mean anything other than a vacuum leak at the carb base? ie is my theory correct or have I done something to the carb. (fairly new 1904 Edelbrock)

**swervin ervin** · 12-06-2002, 06:38 PM

Sounds like a vacuum leak to me. I think you will be OK now.

85 K5 · 12-06-2002, 06:48 PM

Thanks Mike

12-06-2002, 05:44 PM	#1
85 K5 Registered User Join Date: Nov 2002 Location: Spring TX Posts: 113	knock/ping update Ya know my choke was not up to par - acting funny. Sprayed some carb cleaner on the linkage while it was idling and noticed rpm went way down, almost died. No the cleaner did not go into the carb intake. It did go into the the intake at the base gasket, however. Tightened the carb mounting bolts (seemed pretty loose) and the idle again went down, almost died. Set the idle speed back up and I'll bet the knock/ping is also gone! Maybe the timing can be increased now. Just wanted to share this and hope it helps! Just hope I didn't get them too tight. Only halfway out on the handle of a 1/4" drive ratchet. Can someone tell me does this mean anything other than a vacuum leak at the carb base? ie is my theory correct or have I done something to the carb. (fairly new 1904 Edelbrock) __________________ 350 Crate 10 bolt 3.73 2.5 lift 32x11.50 1904 Edelbrock http://www.oplnk.net/~spirit/K5front.jpg

12-06-2002, 06:38 PM	#2
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	Sounds like a vacuum leak to me. I think you will be OK now. __________________ Mike 1985 Chevy C-10

12-06-2002, 06:48 PM	#3
85 K5 Registered User Join Date: Nov 2002 Location: Spring TX Posts: 113	Thanks Mike __________________ 350 Crate 10 bolt 3.73 2.5 lift 32x11.50 1904 Edelbrock http://www.oplnk.net/~spirit/K5front.jpg



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