Question about Chevrolet Suburban 1500

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'89 suburban 5.8l.. acts like too much fuel to injectors..black smoke, spits & sputters at times. Starter, plugs & wires, fuel pump & in tank hose, filter, fuel regulator silinoid, injector connectors, have all been replaced. How do you adjust fuel flow? Or any ideas?

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Check the O2 sensor in the exhaust manifold and the E.G.R. valve in the intake as these aid in how much fuel is introduced into the system through the computer system

Posted on Jul 18, 2010

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Posted on Jan 02, 2017

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My 1990 Chevy k1500 5.7L It will hesitate,spit,sputter even stall. I did a full tune up new spark plugs/wires, cap/rotor new VSS, fuel filter, put good gas in it, injector cleaner in it. Help


FUEL PRESSURE MUST BE IN THE 35-45 LB RANGE TO OPERATE PROPERLY. CHECK YOUR FUEL PRESSURE AND THEN FUEL QUANTITY BEING DELIVERED. YOU MAY HAVE A FAULTY FUEL PUMP WHICH IS VERY COMMON

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If you have not replaced plugs start there A bad map sensor will also cause black smoke and poor running

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Acts like s not getting fuel


Check gap on plugs,did you use new o rings on the injectors

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My suburban stalls and sputters out after running for about 15 minutes. I have replaced all the O2 sensors, plugs, wires, crank sensor, oil change, fuel filter, cap and rotor. What else could be the...


need to check the fuel pressure.and if its blowing black smoke,the fuel pressure regulator is bad.the fuel pressure should be around 65 pounds.

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