p0300 code

2001 CHEVROLET ASTRO
134,000 MILES • 4.3L • 6 CYL • RWD • AUTOMATIC
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TWOREAL2005
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  • 1 POST
.I have changed plugs/wires, distributor cap/rotor an coil/mod an just did fuel filter. I got a can of carburetor cleaner an sprayed the intake. The service light goes out and it stays off for a good minute. What is this fuel regulator, fuel pump? but it is running fine not missing or turning off? Help!
May 28, 2016 at 8:56 AM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
check fuel pressure with a gauge auto parts rent it. if 60-66 psi it is good if not pump or regulator is bad, but probably pump. check for a vacuum leak as well. finally if it still shows a 300 code have a local professional freeze frame it so he check some voltages.
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
May 28, 2016 at 9:23 AM
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