Im at a standstill,4 dead coil-packs?? 99Deville
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, Im at a standstill,4 dead coil-packs?? 99Deville in Past Cadillac Vehicle Discussion; Well guys!!.I have a 99 Cadillac deville,that was a daily driver untill last Friday when it stalled as I was ...
  1. #1
    northstar87 is offline Cadillac Owners Member
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    Im at a standstill,4 dead coil-packs?? 99Deville

    Well guys!!.I have a 99 Cadillac deville,that was a daily driver untill last Friday when it stalled as I was pulling out onto 59!. 20+re-start attempts later,we towed it home! Checked fuel pressure, battery V an ignition coils...An what do u know, coil-pack is dead!? It's getting input voltage just no HV output? An I doubt all four packs took a dump on me..so what sensor/sensors would cause this? Thanks


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    rodnok01's Avatar
    rodnok01 is offline Cadillac Owners Master
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    Re: Im at a standstill,4 dead coil-packs?? 99Deville

    Have you pulled the codes?
    Simple answer sounds like ICM took a dump...

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    northstar87 is offline Cadillac Owners Member
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    Re: Im at a standstill,4 dead coil-packs?? 99Deville

    Yep,an didn't tell me anything! My friend has a OBD 2 scan tool that I'll hook up tonight an see if that works!!..appreciate the info,rodnok01

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    rodnok01's Avatar
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    Re: Im at a standstill,4 dead coil-packs?? 99Deville

    Built in scanner shows way more than hand helds except for very high end(Tech II) and the like.
    Post any and all codes with definitions.

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    Ranger's Avatar
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    Re: Im at a standstill,4 dead coil-packs?? 99Deville

    There is no such thing as a "coil pack". Chances of all 4 coils failing at the same time are just about nil. I'm with Rod. I'd suspect the ICM (it's what the 4 coils are mounted on).

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    northstar87 is offline Cadillac Owners Member
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    Re: Im at a standstill,4 dead coil-packs?? 99Deville

    Quick update, it's not the icm! Soo,I guess its time to replace cam sensor an both crank sensors!

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    Re: Im at a standstill,4 dead coil-packs?? 99Deville

    i wouldn't do that either

    at this point i'm guessing one of the weird grounding issues that this generation seemed to have problems with

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    rodnok01's Avatar
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    Re: Im at a standstill,4 dead coil-packs?? 99Deville

    I don't believe failed of either would cause a no start, a limp mode maybe and they will throw codes if the crap out completely. Have you pulled the codes??

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    Aztec ETC ECS's Avatar
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    Re: Im at a standstill,4 dead coil-packs?? 99Deville

    Are your sure it has no spark?
    You may want to check your injector fuse(s) first, if you didn't already.

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    northstar87 is offline Cadillac Owners Member
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    Re: Im at a standstill,4 dead coil-packs?? 99Deville

    Yes I have,i will post them as soon as I get off.

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    northstar87 is offline Cadillac Owners Member
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    Re: Im at a standstill,4 dead coil-packs?? 99Deville

    P1375-IC 24X Reference Circuit High Voltage.. Should I replace all three sensor? Cam/crankA/crankB..already replace the cam sensor .

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    rodnok01's Avatar
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    Re: Im at a standstill,4 dead coil-packs?? 99Deville

    http://www.cadillacforums.com/forums...ltage-too.html

    I would check the wiring going to the ICM also carefully, there have been a couple issues with pins pulling out IIRC or just bad connections.(pins collapsed on one fellow and had to be opened up to make a connection)

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    Re: Im at a standstill,4 dead coil-packs?? 99Deville

    This will show you what each of the 4 ICM connectors are for.
    Attached Images
    rodnok01 likes this.

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    Re: Im at a standstill,4 dead coil-packs?? 99Deville

    Quote Originally Posted by RippyPartsDept View Post
    i wouldn't do that either

    at this point i'm guessing one of the weird grounding issues that this generation seemed to have problems with
    There should be a ground attached to steel base were the coils sit. Just a suggestion.


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    northstar87 is offline Cadillac Owners Member
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    Re: Im at a standstill,4 dead coil-packs?? 99Deville

    My nightmare is over!!!!

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