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Car shuts off and won't start back up.

This is a discussion on Car shuts off and won't start back up. within the General Help forums, part of the LSx Technical Help Section category; Originally Posted by 0rion I guess I was assuming a case learn had been done with the swap and to ...

  1. #21
    Veteran Hi-Po's Avatar
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    Quote Originally Posted by 0rion View Post
    I guess I was assuming a case learn had been done with the swap and to be honest with you I have no experience with case learn or what conditions call for it other than what I've read HERE
    Frost is who I'd probably ask about that relearn as I'm sure he's been there/done that a few times.
    I do believe you could be right though.
    That's who I was hoping would pop up in this thread in regards to the relearn and the swapping of the CKP sensor. I don't have any experience with with the relearn or swapping the CKP other then what I have read. I do know it is possible to do with HPT. I didn't read up on the P0336, seems I mixed that up with P1336 from lack of memory.

    Nonetheless, something to think about and keep in mind if fixing the little things do resolve this issue.

  2. #22
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    The car did not throw a 1336 code. So I doubt that is the issue.

    I am still going to check the ignition relay and a few other suggestions. I will have to wait until Monday though. The shop where my car is has closed for the weekend. It won't be open again til Monday. It is a friends shop, so I will be turning the wrenches on it.

  3. #23
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    Quote Originally Posted by Dozier View Post

    I know that will have nothing to do with the car running though. However there were about 14 total trouble codes. Most of them were related to the transmission, fans, 02 sensors. The car was originally automatic. 02s were tuned out, and fans are hard wired to a switch.

    It did bring up the Crankshaft position sensor P0336. So today I replaced that sensor, and the problem is still the same. No difference. I am baffled.
    You say the o2 were tuned out, but then list codes being thrown for o2 sensors. Are they pre cat codes or post cat codes?

    Post all the codes, stored and active.

  4. #24
    Veteran 0rion's Avatar
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    moved aceshigh22's posts to it's own thread.

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    Quote Originally Posted by Hi-Po View Post
    You say the o2 were tuned out, but then list codes being thrown for o2 sensors. Are they pre cat codes or post cat codes?

    Post all the codes, stored and active.
    This is the only code that the pcm pulls right now:

    P0452
    Evaporative emission control system pressure sensor


    These were what was originally pulled when the problem started:

    P0740
    Torque converter clutch circuit malfunction

    P0113
    Intake air temperature circuit high input

    P0122
    Throttle pedal position sensor switch circuit low input

    P0336
    Crankshaft position sensor a circuit range performance

    P0452
    Evaporative emission control system pressure sensor

    P0480
    Cooling fan malfunction

    P0481
    Cooling fan malcuncion 2

    P0502
    Vss circuit low input

    P0753
    Shift solenoid electrical

    P0758
    Shift solenoid electrical

    P0785
    Shift timing solenoid malfunction

    P1810
    Transmission pressure switch manifold fault

    P1860
    Tcc pwm solenoid electrical fault

    P0134
    02 sensor circuit no activity detected bank 1 sensor 1

  6. #26
    Senior Member Danger731's Avatar
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    open to closed loop issue

  7. #27
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    The PCM used the outputs of 5 different sensors for timing and MAF, and Crank sensor are a couple of them, Off the top dont recall the other 3 but i can get them tomorrow.

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    Exclamation Faulty pump

    I have a 99 trans am with a walbro 255 doing the same thing. When the temps are cold out i never have any problems, however when it warms up after a little running mine does the same thing. When it does that i just let it cool down and it will start and run for a lil while and then back to it. I checked the fuel pressure when it dies and the fuel pressure was at 30 psi. I am changing the pump to a racetronics. Good luck i hope this helps.

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    If you read...You will see I already checked the fuel pump. It is fine.

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    Faulty pump maybe?

    I did read your post i wondered if you checked the pressure when the engine was hot. The fuel pressure on mine is fine 55p.s.i when it is cold but as it warms up the pressure drops....I guess i should of explained myself better. Just trying to help man!

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    I stated in the first post, the fuel pressure was at 56-57 psi when running and when it stalled, it went up to 60 and stayed. But of course it goes up when the motor is shut off. There is nothing wrong with the fuel system anywhere. The motor does not have spark once it warms up.

  12. #32
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    Pulled the PCM today to check for burned leads on the plugs..Nothing...

    Does anyone know where I can get a PCM tested if I carry it in somewhere.

  13. #33
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    I don't think there is anyway to check a PCM outside of a car. I would suggest just replacing the crank sensor. Don't worry too much about the 'CKP sensor relearn.' In my experience(other GM cars) the majority of the time you won't have any problem skipping the relearn.

  14. #34
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    Quote Originally Posted by Cutlass View Post
    I don't think there is anyway to check a PCM outside of a car. I would suggest just replacing the crank sensor. Don't worry too much about the 'CKP sensor relearn.' In my experience(other GM cars) the majority of the time you won't have any problem skipping the relearn.
    He said he replaced it in post 11. Didn't state whether he did any relearn procedure afterwards. I know that if I was having this problem it would at least be something I would be considering.

  15. #35
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    dang, you're right. Too long ago to remember I guess.
    Here some additional info from the 1998 Camaro service manual for P0336
    The following conditions may cause this DTC to set:

    - Poor connections/terminal tension at the sensor.

    - Crankshaft reluctor wheel damage or improper installation.

    - The sensor coming in contact with the reluctor wheel.

    - The engine running out of fuel.

    - If the crankshaft rotates backwards, this DTC sets. This condition is only with vehicles equipped with a manual transmission. This condition can occur when a vehicle is on an incline and the clutch is released and an engine stall occurs.

    • Excessive crankshaft end play will cause the CKP sensor reluctor wheel to move out of alignment with the CKP sensor. This could result in any one of the following:

    - A no start

    - A start and stall

    - Erratic performance

    • An improperly installed propeller shaft could cause excess crankshaft end play.


    •Visually/Physically inspect all circuits going to the Crankshaft Position sensor for the following:

    - Routed to close to secondary ignition wires or components

    - Routed to close to after-market add on electrical equipment

    - Routed to close to solenoids, relays and motors

  16. #36
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    Ive heard people having to use different size (thickness) washers to shim the sensor. It has to be right, and out of all those codes you listed, that's the one that pops out as being one of the main culprits.

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    Well, I bought a PCM today used from someone. It is being shipped and I should have it by Friday. I will try that, and if no luck, I will sell the PCM and continue searching through the engine...

    New stuff to add. Along with the spark going away, the fuel injectors no longer get signal either when it cuts off.

  18. #38
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    Ok, the new PCM got put on the car, then we put the saved tune from the dyno on the pcm. Fired up the car, and everything is great. Back to normal. Problem solved. I hope this can help someone else in the future.

    Thanks for all the help everyone.

  19. #39
    Senior Member Danger731's Avatar
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    wow

  20. #40
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    interesting! Glad its fixed. That was a tough one to figure out

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