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Engine Misfire Questions..

Discussion in 'Trucks and Trailers' started by Petr51488, Mar 5, 2008.

  1. Petr51488

    Petr51488 LawnSite Silver Member
    from NJ
    Messages: 2,377

    This problem started a few weeks ago. When i would start the engine it would almost hesitate to start, but i didn't have to give it any gas to get it running. When its cold out, it sounds like its misfireing when i'm driving in first gear and maybe 2nd. I changed the plugs, wires, distrib cap maybe 8 months ago. Now, i remember the guys that ran a diagnostic a few months back tell me that it was my oxygen sensors (check engine light). I bought my own scanner and it came up with 2 codes for the same thing which was misfire and maybe ignition. I can get the exact code number/description if necessary. Now, it got me thinking. I have 2 oxygen sensors, and 2 codes came up for the same thing. Do you think its the oxygen sensors? I havnt replaced those yet in this truck (113k miles) I've had it in my possetion since about 85k. Should i replace the oxygen sensors or is it just a waste of money? Any ideas?
  2. Petr51488

    Petr51488 LawnSite Silver Member
    from NJ
    Messages: 2,377

    I got the code just incase. Its P1345 Manufacturer control ignition system or misfire.
  3. jrc lawncare

    jrc lawncare LawnSite Senior Member
    Messages: 420

    I'd find out for sure which one it is, they are kinda pricey.
  4. J&R Landscaping

    J&R Landscaping LawnSite Fanatic
    Messages: 5,095

    If you can replace them yourself, I'd do that. Pepboys sells them starting @ $14.99. Not sure what one for you truck would go for though.

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