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Re: 1990 Suburban (350 TBI) knock problem
Quote:
Originally Posted by Jonboy
Make sure that the distributor is clocked correctly. I was having similar problems, and it ended up being the distributor clocking. The plugs on the side should be pointing at about 2 o'clock. Disconnect the SPOUT connector, and set initial timing at about 2 degrees advanced. See what that does.
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The plugs are at like 1 or 2. I had the timing set at 2, but it "knocks" less at 0. So right now it's at 0. Pretty sure something is funny with the MAP sensor, so I'm going to replace that, and go from there.
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1995 Suburban K2500 454.....off road & towing
1999 Astro, work van
2006 Silverado 2wd 5.3 w/4.5" lift and 33s
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