2002 silverado code p0300

Asked by Mar 26, 2016 at 09:34 PM about the 2002 Chevrolet Silverado 1500 LT Ext Cab Short Bed 2WD

Question type: Maintenance & Repair

Truck doesnt want to idle or run right.  only
able to go 25-30 mph. Was able to get to auto
zone and had obd tested. Code p0300 popped
up and the sel light is flashing. I replaced the
fuel injector pressure regulator per auto zone
recommendation. Still popped same code???
Any suggestions

2 Answers

116,055

the infamous random multiple misfire code, replace the fuel filter then start checking and replacing the spark plugs, and if you do replace use good ones like ACs, then have the injectors cleaned and dump in a bottle of Techron in the fuel tank, as those are the most common problems. Clear the code and drive it as you normally would, hopefully that will get it, if not then you will have to go in for a live data scan to find out what is causing it.

1 people found this helpful.
83,735

Like tennisshoes says...P0300 CHEVROLET - Cylinder Misfire Detected Random Cylinders... Possible causes... - Faulty spark plug (s) - Faulty ignition coil (s) - Clogged or faulty fuel injector (s) - Intake air leak - Fuel injectors harness is open or shorted - Fuel Injectors circuit poor electrical connection - Ignition coils harness is open or shorted - Ignition coils circuit poor electrical connection - Insufficient cylinders compression - Incorrect fuel pressure

2 people found this helpful.

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