Jump to content

P0300 DTC - Please help

yukonsc

Recommended Posts

yukonsc Enthusiast

yukonsc

Posted
Posted

Well - I start the truck this morning the MIL started to blink then I turned the truck off and started it again and the light was solid. I used a scan tool and found that it was a the p0300 engine code Random/Multiple Cylinder Mis-Fire.

 

However the truck seemed to run fine I didn't hear or feel any missing.

 

Where do I start? Is there a common solution and or a quick down and dirty testing? - I'm sure it goes without saying but - I would like to avoid the dealer is possible.

 

Thanks.

 

BTW Ambient Temp was at 17f today

yukonsc Enthusiast

yukonsc

Posted
  • Author
Posted

I forgot - its a 2000 Yukon 5.3 with 118000 miles. Also I was just thinking my commute is all of about 2-3 miles. The truck never really warms up becuase of the cold temps. I wonder if that could have something to do with it?

GMCTech Enthusiast

GMCTech

Posted
Posted

Unfortunately, you'll need a better scan tool than just a code reader. A good shop should have one that can be used to see exactly which cylinder(s) are misfiring.

 

When was your last fuel filter replacement? When was your last bottle of injector cleaner added? These are a couple questions that come to mind quick as far as which direction to begin looking.

 

Hope this helps.

yukonsc Enthusiast

yukonsc

Posted
  • Author
Posted

The fuel filter has been awhile as well as the injector cleaner. I'll change that stuff this week.

 

An suggestions on a scan tool that would do the job? Or is the Tech II the only one?

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.6k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    343,007
    Total Members
    8,960
    Most Online
    Brendan C
    Newest Member
    Brendan C
    Joined

  • Who's Online   5 Members, 0 Anonymous, 1,002 Guests (See full list)

  • Latest Articles

  • Posts

    • Z45
      2026 6.6 L5P oil cooler leaking oil at 4,000 miles

      By Z45 · Posted

      The oil filter has NOTHING To do with oil leak. GM sources parts from 1,000's of vendors and as with anything mass produced, flaws are unavoidable.    Putting a larger oil filter will do nothing but satisfy emotions. The OEM filter is designed for the engine and perfectly capable of handling the demands on the engine. Oversize oil filter could result in reduced flow and overall lower oil pressure.
    • Grumpy Bear
      Joke Thread

      By Grumpy Bear · Posted

    • Grumpy Bear
      The Peckish Synapse

      By Grumpy Bear · Posted

      You're better read than that Atlas. 😏   British science fiction writer Arthur C. Clarke formulated three adages that are known as Clarke's three laws, of which the third law – that "any sufficiently advanced technology is indistinguishable from magic" – is the best known and most widely cited.   Stribeck and the pivotable Hersey Number isn't voodoo nor snake oil. That part is physics. It's what marketing and bean counters do with it that is snake oil and voodoo.    Stribeck is the relationship between Hersey and the Coefficient of Friction. Within the Hersey Equation if viscosity and viscosity is 'Dependent' on.......heat.......and.......viscosity index or the temperature to viscosity slope.    Specifically Hersey is the viscosity AT THE TEMPERATURE IN THAT LOCATION FOR THAT SLOPE.   Hydrodynamic lubrication exist when the film thickness in the location is 3X the Ra roughness of the surface. This is irrespective of the hardness of the substrate. To obtain that thickness X viscosity is required for Y velocity at Z load. That's a lot of moving parts. It is also impossible to maintain in an ICE but nearly possible with a turbine under constant load.    What does that mean? Error heavy and operate light. Wear is inevitable but the rate of wear and the milage obtainable are a function of prevailing conditions and HABITS. The only penalty is viscous drag and at fractions so low as to be well worth the effort. Double the life, half the manufacturing carbon foot print. Greed is the only impediment.    The materials generated by SwRI are the RESULT not an estimation or a hypothesis.    Don't delude yourself sir, EV's have as many pitfalls as ICE's. We just don't know what they are yet and it will take longer to sort as MARKETING and GREEDY CEO's have had more time to polish the turd they are selling. 
    • Grumpy Bear
      The Peckish Synapse

      By Grumpy Bear · Posted

      You can always count on greed to prey on ignorance and stupidity.    Friend bought a 2019 Ford Flex and asked me about using Valvoline R&P 5W30 in it. Told him give the miles on it and the fact it wasn't yet using oil that it was a good plan. He uses a Valvoline quick change shop for his oil service.   First they tell him that isn't the oil the OEM recommends. He told them he didn't care what the OEM thought. Then they floated the, "But it will void your warranty"    His reply was it's a 2019, there is no warranty and informed them their knowledge of the law was lacking.    Then they tell him 'But it will ruin your motor"!.    Mine to ruin he says. Finally they give in and charge him 150% the semi-syn price    Point it the brainwash is so embedded that even the service industry is drunk on their swill. The public is right behind them. Echoing the same lies on every forum and media platform. If the end goal is indeed EV then I'd say that ship is about built. 
    • CamGTP
      Gas Prices

      By CamGTP · Posted

      Diesel hit $6.00 here today at the truck stop.   Payed $2.79 for E85 today too.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...