2000 STS 0302 code cylinder 2 misfire
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Cadillac Seville / Cadillac Eldorado Forum Discussion, 2000 STS 0302 code cylinder 2 misfire in Past Cadillac Vehicle Discussion; My wife was driving my car yesterday and the service engine light started blinking. After a few minutes it stayed ...
  1. #1
    Robs2000STS is offline Cadillac Owners Member
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    2000 STS 0302 code cylinder 2 misfire

    My wife was driving my car yesterday and the service engine light started blinking. After a few minutes it stayed on. When she got home i noticed it was running really rough. I hooked the scanner up and got 0302 cylinder 2 misfire detected. Does anyone know if that is located in the front or back of the northstar? I'm going to start with the plugs first, if that fails i will chang the boots out and if that fails i'll change the coil pack. Does that sound like i'm taking the proper action? I would appreciate any help.

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    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: 2000 STS 0302 code cylinder 2 misfire

    Even numbered cylinders are in the front if I remember correctly.

  4. #3
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
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    Re: 2000 STS 0302 code cylinder 2 misfire

    Front bank is 2,4,6,8 left to right, looking at the engine from the radiator.

    Here's what you're working with...........

    You might see some oil on the lower plug bodies - O-ring well seal weep. Not to worry.

  5. #4
    Robs2000STS is offline Cadillac Owners Member
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    Re: 2000 STS 0302 code cylinder 2 misfire

    I changed the plugs today and there was no change. I swapped the boots and i got the same 0302 error so i assume its not the wires. Could it be the front coil pack?

  6. #5
    eyekandyboats.inc's Avatar
    eyekandyboats.inc is offline Cadillac Owners Connoisseur
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    Re: 2000 STS 0302 code cylinder 2 misfire

    coil pack sounds like it then.


    SUB- there has been quite alot of these misfire posts coming up now! its intresting. its like i comes in waves.

  7. #6
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
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    Re: 2000 STS 0302 code cylinder 2 misfire

    Yeah...........A junkyard pullout is perfectly fine, or look in www.rockauto.com. The DELPHI cassette with ICM is the original equipment.

  8. #7
    Robs2000STS is offline Cadillac Owners Member
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    Re: 2000 STS 0302 code cylinder 2 misfire

    I hope its the coil pack because i dont know what else it could be.

  9. #8
    eyekandyboats.inc's Avatar
    eyekandyboats.inc is offline Cadillac Owners Connoisseur
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    Re: 2000 STS 0302 code cylinder 2 misfire

    probably is the coil casette
    but look for a used one.. they cost a pretty penny.

  10. #9
    Robs2000STS is offline Cadillac Owners Member
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    Re: 2000 STS 0302 code cylinder 2 misfire

    I'm searching the junkyard classifieds and they list the coil packs as left and right, not front and back. does anyone know what the front would be condsidered? Thanks in advance.

  11. #10
    bdubcaddy is offline Cadillac Owners Member
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    Re: 2000 STS 0302 code cylinder 2 misfire

    I don't know if there is any difference since mine is a 96 STS but I had a misfire and I replaced plugs and wires, not with AC Delco mind you, and still didn't fix it so I then replaced one of the coil packs with a brand new one from Schucks that cost me $20. The car ran better than it ever did and still does with no problems and this was over a year ago. I do, however, think I will go with AC Delco at my next tune-up for plugs and wires just to see if there is any difference and because so many people here swear by them and say the car doesn't run the same without them.

  12. #11
    eyekandyboats.inc's Avatar
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    Re: 2000 STS 0302 code cylinder 2 misfire

    your 96 is WAY diffrent than 2000 enignes.
    As for the left and right. I beleive when refering to that you look at the engine from the flywheel which is on the tranny side i beleive. so then you will want the left side.
    someone confirm? sub
    either way i beleive the only diffrence between the coil casettes is the colour.. so other then that they SHOULD be swapable.

  13. #12
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
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    Re: 2000 STS 0302 code cylinder 2 misfire

    The coil cassettes and ICM's for the 2000+ engines are identical in electrical characteristics except the front (left) cassette is gray, the rear (right) cassette is black. Go back to Post#3 - that's the front (left) cassette with ICM.

    bdubcaddy, Google "waste spark ignition" to find out what your system is. Quite different from the coil-on-plug of the 2000+

  14. #13
    caddydaddy's Avatar
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    Re: 2000 STS 0302 code cylinder 2 misfire

    I had the same issue about a month ago with my 2000 STS. One of the coils in the front coil pack died. For an extra piece of mind I spent the extra money on a new one from Rock Auto.

  15. #14
    Robs2000STS is offline Cadillac Owners Member
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    Re: 2000 STS 0302 code cylinder 2 misfire

    Guys
    Thanks for all the help. I found a front coil pack at a junkyard a few towns over. I just put it in and took it for a test drive and it feels like it did the day i bought it. I'm so releaved that did the trick. Thanks again.

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