S-10 Forum banner

p0303

  1. S10 / Sonoma
    I bought a 2003 Chevy s10 4.3 a few months ago and for the first few months I had no problems with it but one night I was going about 60 and I slammed down on the gas and the check engine light started blinking. Knowing it was a bad misfire I replaced everything I could think of. I replaced the...
  2. 262ci Forum (4.3)
    Hello! My truck has been throwing some mixed signals this year. At first she was giving me a P0301, so I changed all the electrical components (sparks along with the wires, distributor rotor and distributor cap). I also installed a new fuel pump and the air intake is in perfect condition (clean...
  3. 262ci Forum (4.3)
    Replaced distributer cap and rotor as well as plugs and wires, did not change a thing. Tested for spark from cap and wire and plug all spark is good. Did compression test, all cylinders read at 150 within 3 cranks. Compression is good and spark is good so I’m replacing the injector with the...
  4. 262ci Forum (4.3)
    I have a 2000 s10 zr2 blazer with the 4.3L Vortec Only code is P0303 Due to low pressure issues and backfiring I picked up the engine and transmission out of a 80k mile 2000 gmc jimmy and my father and I swapped both in. We replaced all spark plugs and plug wires, new cap and rotor, complete...
Top