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1999 cadillac catera p0302 code

Hi, Iam working on this Cadillac catera 6 cylinder 3.0 .Has p0302 error code. Checked compression,its 200 psi,I switch spark plug to cyl 4,switch fuel injector to cyl 1,and still the code p0302. My cuestion is: Do you think the problem is the coil pack?.Or what do you think is next.Please help.Thanks.

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  • JESUS RUIZ Dec 10, 2012

    These coils are together,they come marked,driver side 2,4,6,its only one pack of 3 and no wires.I dont know if can switch driver side on to the other side.Autozone or ebay ask for side 2,4,6 or 1,3,4.I have to check tomorrow afther work.THanks.

  • montehammons Dec 10, 2012

    oh, ok, I see I am defeated by new tech that I havent had the pissure to acommodate...good luyck, jose!

  • montehammons Dec 10, 2012

    oh, sorry jesus, and good luck for sure. hope you figure it out.

  • montehammons Dec 10, 2012

    so, one possibly bad coil means you have to replace that bank of coils?

  • JESUS RUIZ Dec 11, 2012

    Yes, are to spencives but I found one on car-parts.com for 12 bucks,I called this moorning ,they have it $25 dls incluide shipping.Its not to bad to try it.I think its the next step to do.Thankyou very much.If works I'll let you know.Thanks.

  • JESUS RUIZ Dec 20, 2012

    Hi,I get the coilpack today and repased,Thanks to everybody,Cadilac Catera runs very good.For $25 bucks only.

  • montehammons Dec 20, 2012

    Glad to hear that. $25 is great! Nice work, Jesus.

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  • Ford Master
  • 5,317 Answers

Try switching coils and see if problem follows coil. Same with plug wires, try switching wires.

Posted on Dec 10, 2012

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wireguy212
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SOURCE: how do i fix my 2001 cadillac catera idle problem

The problems you are describing indicate to me that you likely need to replace the coil pack that runs from the spark plugs ,and the plug wires end up at it.It also may be the spark plug wires,get a water bottle and spray the wires after dark and if you get a light show from them then replace them,if not,replace the coil pack.

Posted on Jul 15, 2010

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SOURCE: miss fire cylinder 1 & 6 on a 4 liter enginge

Did the engine light go on, and you got a miss-fire code? If so, 1st check spark plugs (which u did), then plug wires, if that's not it, the injectors would be next. Let me know how u make out
Curt

Posted on Mar 13, 2009

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SOURCE: My 1998 Buick LeSabre has a misfire on cylinder

Hi, I would check for a vacume leak around your intake manifold #1 cylinder runner. You can check by using a stethescope with a small piece of brake line in the end of the hose or spraying propane around the intake. If you hit a vacume leak the RPM will drop. Vacume leakes normaly cause a higher RPM at idle.

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SOURCE: misfiring code po1399 cylinder 3 and 4

I have 2002 accord 2.3 my engine light on p0303- and p01399 can any one help what cost mostly this cod.

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