Re: 1986 C20 350/400 wont go past 2500 RPM in Drive
Figured it out. The check valve in the factory fuel filter in the Q-Jet was sticking. Went ahead and bought a new filter and pulled that valve out. Glad it was something simple.
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1970 C15 GMC Long Bed
1986 C20 Scottsdale
1983 K2500 Sierra Classic Suburban 6.2
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