p300 and po175&po172 wtf!!!
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Cadillac STS-V Series Forum Discussion, p300 and po175&po172 wtf!!! in Cadillac V-Series Forums; Car started stumbling and white smoke coming out of exhaust tips and engine bay. Could this be a bad coil ...
  1. #1
    Psycho-albanian is offline Cadillac Owners Fanatic
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    p300 and po175&po172 wtf!!!

    Car started stumbling and white smoke coming out of exhaust tips and engine bay. Could this be a bad coil pack? I just replaced the plugs with ngk tr6 and replaced the fuel pressure regulator/fuel filter and now I got a gas smell coming through the cabin and a flashing ses light. Please help.

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    What coil packs do you guys recommend msd or factory.

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  3. #2
    PGA2B's Avatar
    PGA2B is offline Cadillac Owners Connoisseur
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    Re: p300 and po175&po172 wtf!!!

    Are you loosing any antifreeze?

  4. #3
    1madstsv's Avatar
    1madstsv is offline Cadillac Owners Connoisseur
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    Re: p300 and po175&po172 wtf!!!

    You are one of the only ones that seem to be having these issues how many miles are on your car? I think that you more than likely have a wire off. Coils don't very often go bad. Loose plug wire off our not connected right would be my guess. I also don't think the fuel regulator was your problem they normally either work Our they don't to the point the car will not run at all.

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    Did you ever check your injectors to see if one want bad our is not fully connected.

  5. #4
    Psycho-albanian is offline Cadillac Owners Fanatic
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    Re: p300 and po175&po172 wtf!!!

    I have 130, 000 miles on the car and I see no antifreeze leaking on the ground car just started acting up after the fuel filter change. Car is starting to piss me off but with the miles I have on the car things are bound to start breaking/malfunction.

  6. #5
    PGA2B's Avatar
    PGA2B is offline Cadillac Owners Connoisseur
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    Re: p300 and po175&po172 wtf!!!

    You need to find out what cylinder is missing or if you have multiple misfires. If you have a single cylinder misfiring then you should swap coils with one you know if not misfiring and see if the misfire follows the coil or stay with the cylinder.

  7. #6
    Psycho-albanian is offline Cadillac Owners Fanatic
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    Re: p300 and po175&po172 wtf!!!

    I have multiple missfires po305 and po300 came up on the scanner.

  8. #7
    PGA2B's Avatar
    PGA2B is offline Cadillac Owners Connoisseur
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    Re: p300 and po175&po172 wtf!!!

    MSD does not have a coil for us unless you figure out something that is interchangeable.

  9. #8
    YoungBlood_STSV is offline Cadillac Owners Fanatic
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    Re: p300 and po175&po172 wtf!!!

    Quote Originally Posted by Psycho-albanian View Post
    I have multiple missfires po305 and po300 came up on the scanner.
    Then focus on cylinder #5. I actually had my #5 coil pack go bad. But had none of the other awful sounding symptoms you have. Quick swap of that coil pack and I was on my way with no incidents since.

  10. #9
    Psycho-albanian is offline Cadillac Owners Fanatic
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    Re: p300 and po175&po172 wtf!!!

    It's crazy the problems im having with this car. Gonna check the coil pack tomorrow and see what's up. I appreciate all your guys help.

  11. #10
    TimmyC is offline Cadillac Owners Connoisseur
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    Re: p300 and po175&po172 wtf!!!

    Swap the number 5 coil pack with another one and see if the problem follows it. If it doesn't then I bet the injector is stuck open. Number 5 is the third cylinder back on the passenger side.

  12. #11
    pjeter is offline Cadillac Owners Member
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    Tim it doesnt seem to be the coil. I switch that around and the code doesn't follow... what's the best way to figure out which injector is stuck open?

  13. #12
    TimmyC is offline Cadillac Owners Connoisseur
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    Re: p300 and po175&po172 wtf!!!

    Try swapping number 5 injector.

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