Thread: Q-jet Problems
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Old 02-05-2017, 05:21 PM   #4
Whitelm
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Join Date: Apr 2014
Location: Idaho Falls, Idaho
Posts: 11
Re: Q-jet Problems

Timing was set at 8 degrees btdc with vacuum plugged at ~750 rpm. Revving the engine to about 2500 rpm with the vacuum attached I get approximately 16 to 18 degrees past tdc. Choke is Manual so that should not be an issue. I took the truck to what I thought was a reputable mechanic to see if he had any ideas. When I got the truck back, after $100 for nothing, they had pulled the carb down and broken the Secondary Float Bowl insert. (an issue that they deny doing). I replaced the insert and put the carb back together. Because the carb was broken into National Carburetor refuses to warrantee it, so I am now stuck with what I have. I am at a loss. I have never had any of my trucks act like this. I have owned two 71's and a 70. and never seen this issue before.
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