sudden stalling
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Northstar Engines and System Technical Discussion Discussion, sudden stalling in Cadillac Engine Technical Discussion; 96 deville- i will be at idle and it will just all of a sudden shut off, it starts right ...
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    sudden stalling

    96 deville- i will be at idle and it will just all of a sudden shut off, it starts right back up every time, but it will just suddenly stall, no spuddering no nothing, it just shuts off, is this common or has this happened to someone else before? and whats wierd is when it stalls the only light that comes on is the oil light, but the oil level is fine and all that, no other check engine light or nothing comes on when it stalls....HELP!

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    Re: sudden stalling

    Sounds a lot like bad crankshaft sensor(s).

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    Re: sudden stalling

    i just added some octane booster cause i was getting knocking and pinging, i heard those northstars dont like octane booster?

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    Re: sudden stalling

    and is it hard to put a crankshaft position sensor in? and could it maybe be a clogged fuel filter or something?

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    Re: sudden stalling

    Clogged filter is unlikely. That would manifest itself at high fuel demands first, not at idle.

    If you are getting knocking and pinging, try cleaning the EGR valve. The Northstar has a very effective knock sensor (if it is working), so you should never hear a knock. Octain booster will be a band aid at best.

    Cranks sensors are not too hard to do...... so I hear. I have never had the pleasure.

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    Re: sudden stalling

    what are the symptoms of a bad crank sensor

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    eldorado1 is offline Cadillac Owners Connoisseur
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    Re: sudden stalling

    intermittant stalling, random hesitation and/or bucking, steady speed surging with out changing pedal position, misfiring, to name a few possibilities

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    Re: sudden stalling

    yes but shouldnt that throw a code?

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    eldorado1 is offline Cadillac Owners Connoisseur
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    Re: sudden stalling

    sometimes yes, sometimes no.

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    Re: sudden stalling

    I think a bad TPS might also cause those symptoms, though I am not positive.

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    Re: sudden stalling

    no i tested the tps and it was fine

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    Re: sudden stalling

    these are the codes that came back

    PC0603 HISTORY
    PC1599 HISTORY
    PC1632 HISTORY
    IP1552 HISTORY
    IP2710 CURRENT
    IP2711 HISTORY
    IP2781 HISTORY
    AC1340 HISTORY
    RS0027 HISTORY

    HELP?!

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    ewill3rd is offline Cadillac Technician
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    Re: sudden stalling

    I identified those in the other topic you started, at least some of them.

    Sounds like crank sensors to me also.
    If you knew where they were I would tell you to look at them and tell me if the top one was tan. If it is you need to replace them.
    The new ones have a top one that is gray. Replace them both.
    Also it looks like you have a theft deterrent problem, probably the wires breaking inside the steering column. That requires replacement of a lock cylinder and 2 new keys matched to the pellet to the old key.

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    Re: sudden stalling

    ok i will look, is one of the crank sensors behind the harmonic balancer? and wouldnt it throw a code if that was the case?

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    Re: sudden stalling

    Quote Originally Posted by hogstamogsta
    ok i will look, is one of the crank sensors behind the harmonic balancer? and wouldnt it throw a code if that was the case?
    No, they're near the oil filter.

    Here's your code: "P1599 - Engine Stall or Near Stall Detected"

    When one or more crank sensors is flakey, the computer thinks the engine just shut off for some reason...... so it stops everything... and then your engine really DOES shut off.

    But, your "P1632 - Theft Deterrent Fuel Disable Signal Received"
    Raises some flags with me... What happens if it's running and that happens? Is that possible? Does it do anything? Somebody with a OBDII manual look that code up, and see what the deal is... Your stalling might be due to a bad key or something..

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