Car died at stoplight, won't start now...
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Cadillac Seville / Cadillac Eldorado Forum Discussion, Car died at stoplight, won't start now... in Past Cadillac Vehicle Discussion; Died yesterday morning half way home from work. Just stopped like you turned off the key, no sputter or anything. ...
  1. #1
    consigliori's Avatar
    consigliori is offline Cadillac Owners Fanatic
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    Died yesterday morning half way home from work. Just stopped like you turned off the key, no sputter or anything. Tried to restart it, IPC voltage read 11.4. - didn't even crank of course. I figure dead battery and just got a tow home.

    Once home, I pulled the battery and threw a charger on it for the heck of it and went to sleep for a few.
    Overslept big time and had to hurry back to work so just took the wife's car and figured on getting a battery in the morning. I took the charger off the battery on my way out.

    Got home this morning and saw the battery reading 12.60v - it's fine then, it held that for over 10 hours sitting in a cold garage. Put it back in the car and tried to start- click, no crank. Hmm

    Maybe the battery is bad then. I swapped in the battery from wife's car and vice versa. My car same thing, and hers started right up with my battery. Starter? Doesn't really explain why it died but ok, swapped in the starter from the '98 Eldo (man, that comes on handy : ) No dice. Swapped out a few relays just cuz it's easy- Starter relay, Ignition and RAP - nope.

    Btw I tried the battery in the '98 too and it had no problems cranking at all. So then I swapped the negative battery cables. I had already previously checked both cables and they looked fine. Same situation.

    It's dark now so that's a wrap for now. Tomorrow I guess I'll start buy changing out the positive cable.
    I'm kinda at a loss right now though, what am I overlooking...?
    Alternator maybe? I just replaced it not too long ago, but I'll try that too if the positive cable doesn't help.

    What would make it suddenly die like that out of nowhere and then not crank?

    ----------

    Sorry - I pulled codes while waiting for the tow truck guy and all I had was B1983 - Low voltage to device, and one for CD Player Malfunction, both history

    ----------

    And 1599 Engine Stall or Near Stall Detected

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  3. #2
    rodnok01's Avatar
    rodnok01 is offline Cadillac Owners Connoisseur
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    Alt not going to cause a no start situation.
    Car outright dieing is not battery usually either.
    Did you check the main neg battery cable on engine?
    If that breaks it causes all kinds of problems.

  4. #3
    consigliori's Avatar
    consigliori is offline Cadillac Owners Fanatic
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    Didn't get much time with it today, but decided to start "by the book" so I dug out the FSM. Can't say it's helped more times than let me down though, because at some point it usually says "now connect Tech 2 Scan Tool.."
    Not all helpful this time either


    The wiring diagrams in it are gold though, and I'll need em so I shouldn't be slammin on the FSM.
    But I followed that table and it tells me to replace either the starter, battery or cables which are all known to be good.

    Had starter tested anyway, they said it technically passed but was spinning weak so I should replace it...

    That's the starter from the '98 btw that worked fine yesterday, so either they tested it weird or my cars killing it. And the battery tested good. The starter wouldn't straight up kill the engine while running anyway I'd think

    Its gotta be a short somewhere - 12v test light connecting + battery post and + cable lights up brightly. Light goes out when positive cable that attaches to engine fuse block is disconnected.

    I pulled everything there one by one and never got the light to go out (trunk too) , so the short is either something that's not fused or I don't know what....

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    stoveguyy is offline Cadillac Owners Connoisseur
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    Re: Car died at stoplight, won't start now...

    motor stalled, engine will not crank. i pulled starter on other car and reinstalled and motor would not crank. ended up being corrosion on terminals at starter.

  6. #5
    rodnok01's Avatar
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    Re: Car died at stoplight, won't start now...

    I agree with stoveguy, almost has to be a cable issue I would think. A starter failing is not going to cause a car to just shut off. did you check the main engine ground on the frt of engine? If it breaks I do believe car will not run, many folks around here have had it break.

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    consigliori's Avatar
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    Ruh roh...

    I think my engine is seized...
    If I put a wrench on the crankshaft bolt behind the passenger tire, I can't move it at all in either direction. Shouldn't I be able to manually turn that over...? What else can I check to verify or clear this train of thought?

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    stoveguyy is offline Cadillac Owners Connoisseur
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    Take off serp belt. Or just slide it off p/s pulley. Loose is good. That will remove seized ac comp (slim) or seized alt. bal bolt is plenty strong. Do u have 1/2" breaker at least? 3/4" is nice. With 2' extension.

  9. #8
    consigliori's Avatar
    consigliori is offline Cadillac Owners Fanatic
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    And sorry- yes cables, starter and battery and all connections are clean and good.

    I think it's seized - definitely makes sense of the past two days, unfortunately just not very good news. Trying to start or manually turn crankshaft nut in neutral is a no go as well. Something's totally broken and jammed inside, huh? Ay yi yi...

    I'll update ya's

  10. #9
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    Re: Car died at stoplight, won't start now...

    I doubt it's seized.

  11. #10
    consigliori's Avatar
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    Shouldn't I be able to turn that crank nut manually? I can turn it on the other one...

    ----------

    I'm at a loss guys-

    I dunno what else to do

    ----------

    Front cam cover off-

    Chains look alright, but iI can't move the cams with a wrench on the bolts, and also can't budge the flywheel at all in either direction, with a big screwdriver going thru the starter hole

    This isnt normal, right? I should be able to move SOMETHING, no? That's what makes me think its seized / something's broken and jamming everything up...

    Imma hafta pull this whole mofo, is what's going thru my mind about now

    PLEASE tell me I'm wrong...

    ----------

    Alright so it gave- a breaker bar and an insane amount of force on the crankshaft nut gave way and turned over! I can move the flywheel thru the starter hole now too. Imma put it back together and see what happens

  12. #11
    rodnok01's Avatar
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    Re: Car died at stoplight, won't start now...

    Towards top of compression stroke with spark plugs in and engine can be a real bear to turn by hand.
    Did you take the belt off before trying to turn engine over?

  13. #12
    amunderdog is offline Cadillac Owners Connoisseur
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    Re: Car died at stoplight, won't start now...

    pull all the spark plugs.
    Then attempt the wrench.
    It should turn over easy then.
    It may have hydrolocked.
    You would think when trying to start it with key; you would have heard the starter engaging then no crank.

  14. #13
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    Re: Car died at stoplight, won't start now...

    The engine was running when it died. Unless he ran through a very deep flooded road, a hydrolock is unlikely.

    I still do not think it is seized and agree with rodknok.

  15. #14
    consigliori's Avatar
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    It was raining, but no serious puddles or anything.

    Not seized, sure scared me though- I thiink something was lodged in there somewhere, it gave with some serious force-
    But now I can turn the crankshaft by wrench with the normal amount of force that it should take.

    Won't know till morning, but I think it's gonna fire right up

    Hopefully

  16. #15
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    Re: Car died at stoplight, won't start now...

    Pull the park plugs (all) and try to spin the engine (shifter P or N), that should eliminate the seizure suspicions.

    Check the engine ground (better yet run a secondary ground to be sure GND is not it). A loose engine ground will explain ALL the issues you mentioned (dead battery, no crank with fully charged battery).

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