After tune up the engine runs very rough

1995 CHEVROLET SILVERADO
227,000 MILES • 5.7L • V8 • 4WD • AUTOMATIC
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KEVIN JONES4
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Truck listed above is a k1500. I have changed plugs, wires rotor button, distributor cap, ignition coil, ignition control module. It will start upon plugs not being flooded when it starts it runs very rough, timing has been set to #1 plug several times and sometimes it takes a long start to turn over to a very rough run.
Mar 1, 2020 at 9:10 AM
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ASEMASTER6371
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Good evening,

Do you mean the truck floods?

Did you check the actual fuel pressure? I would start there.


https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator


Are there any codes set? The coolant sensor does send a signal to the ECM for rich and lean commands.

Roy
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Mar 1, 2020 at 9:31 AM
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STRAILER
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This guide will help you get the codes:

https://www.2carpros.com/articles/buick-cadillac-chevy-gmc-oldsmobile-pontiac-gm-1983-1995-obd1-code-definitions-and-retrieval-method

Let us know what you find.
Mar 2, 2020 at 11:56 AM
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