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Discuss 1999 Chrysler LHS starting problems in the rec.autos.makers.chrysler forum at Car Dealer Forums; Hi, I have a 1999 LHS which will not start when warm. If cold, the ...
  1. #1
    Scott W.
    Guest

    Default 1999 Chrysler LHS starting problems

    Hi,
    I have a 1999 LHS which will not start when warm. If cold, the car
    starts right up and drives smoothly, with no problems at all. However,
    after the car is driven for a while and turned off, a re-start is
    problematic. Usually it will just crank and crank, but sometimes it will
    spit and cough. After waiting until the car has cooled down, like
    overnight, it will start right up and drive smoothly, with no stalling
    or other problems. There are no trouble codes stored, nor does the CEL
    come on. The car has about 106K miles, and the plugs, timing belt, etc.,
    have been recently replaced, with no change. The gauges, dash lights,
    etc. all work correctly.
    Anyone have any ideas for me?
    Thanks,
    S



    › See More: 1999 Chrysler LHS starting problems

  2. #2
    maxpower
    Guest

    Default Re: 1999 Chrysler LHS starting problems


    "Scott W." <swbusadd@sbcglobal.net> wrote in message
    news:R9zok.16623$LG4.11591@nlpi065.nbdc.sbc.com...
    > Hi,
    > I have a 1999 LHS which will not start when warm. If cold, the car
    > starts right up and drives smoothly, with no problems at all. However,
    > after the car is driven for a while and turned off, a re-start is
    > problematic. Usually it will just crank and crank, but sometimes it will
    > spit and cough. After waiting until the car has cooled down, like
    > overnight, it will start right up and drive smoothly, with no stalling
    > or other problems. There are no trouble codes stored, nor does the CEL
    > come on. The car has about 106K miles, and the plugs, timing belt, etc.,
    > have been recently replaced, with no change. The gauges, dash lights,
    > etc. all work correctly.
    > Anyone have any ideas for me?
    > Thanks,
    > S


    If your looking to take shots at fixing it you can try a cam and crank
    sensor. Otherwise a scan tool will be needed to monitor these sensors as the
    problem is occurring.

    Glenn Beasley
    Chrysler Tech



  3. #3
    Ted Mittelstaedt
    Guest

    Default Re: 1999 Chrysler LHS starting problems


    "maxpower" <gjbeasley@comcast.net> wrote in message
    news:B7ednQujadueqj7VnZ2dnUVZ_rrinZ2d@comcast.com. ..
    >
    > "Scott W." <swbusadd@sbcglobal.net> wrote in message
    > news:R9zok.16623$LG4.11591@nlpi065.nbdc.sbc.com...
    > > Hi,
    > > I have a 1999 LHS which will not start when warm. If cold, the car
    > > starts right up and drives smoothly, with no problems at all. However,
    > > after the car is driven for a while and turned off, a re-start is
    > > problematic. Usually it will just crank and crank, but sometimes it will
    > > spit and cough. After waiting until the car has cooled down, like
    > > overnight, it will start right up and drive smoothly, with no stalling
    > > or other problems. There are no trouble codes stored, nor does the CEL
    > > come on. The car has about 106K miles, and the plugs, timing belt, etc.,
    > > have been recently replaced, with no change. The gauges, dash lights,
    > > etc. all work correctly.
    > > Anyone have any ideas for me?
    > > Thanks,
    > > S

    >
    > If your looking to take shots at fixing it you can try a cam and crank
    > sensor. Otherwise a scan tool will be needed to monitor these sensors as

    the
    > problem is occurring.
    >


    I thought that it was only the 1995 and earlier computers that did NOT set a
    code when the crank sensor failed intermittently?

    It certainly does sound like the textbook crank sensor, though.

    Ted



  4. #4
    maxpower
    Guest

    Default Re: 1999 Chrysler LHS starting problems


    "Ted Mittelstaedt" <tedm@toybox.placo.com> wrote in message
    news:newscache$uc1l5k$my1$1@news.ipinc.net...
    >
    > "maxpower" <gjbeasley@comcast.net> wrote in message
    > news:B7ednQujadueqj7VnZ2dnUVZ_rrinZ2d@comcast.com. ..
    > >
    > > "Scott W." <swbusadd@sbcglobal.net> wrote in message
    > > news:R9zok.16623$LG4.11591@nlpi065.nbdc.sbc.com...
    > > > Hi,
    > > > I have a 1999 LHS which will not start when warm. If cold, the car
    > > > starts right up and drives smoothly, with no problems at all. However,
    > > > after the car is driven for a while and turned off, a re-start is
    > > > problematic. Usually it will just crank and crank, but sometimes it

    will
    > > > spit and cough. After waiting until the car has cooled down, like
    > > > overnight, it will start right up and drive smoothly, with no stalling
    > > > or other problems. There are no trouble codes stored, nor does the CEL
    > > > come on. The car has about 106K miles, and the plugs, timing belt,

    etc.,
    > > > have been recently replaced, with no change. The gauges, dash lights,
    > > > etc. all work correctly.
    > > > Anyone have any ideas for me?
    > > > Thanks,
    > > > S

    > >
    > > If your looking to take shots at fixing it you can try a cam and crank
    > > sensor. Otherwise a scan tool will be needed to monitor these sensors as

    > the
    > > problem is occurring.
    > >

    >
    > I thought that it was only the 1995 and earlier computers that did NOT set

    a
    > code when the crank sensor failed intermittently?
    >
    > It certainly does sound like the textbook crank sensor, though.
    >
    > Ted
    >
    >

    Whether it sets a code or not a scanner connected to the vehicle as the
    problem is occurring will see that the cam or crank signal went dead


    Glenn



  5. #5
    2oldskool55
    Guest

    Default Re: 1999 Chrysler LHS starting problems

    On Aug 13, 6:01*am, "Scott W." <swbus...@sbcglobal.net> wrote:
    > Hi,
    > I have a 1999 LHS which will not start when warm. If cold, the car
    > starts right up and drives smoothly, with no problems at all. However,
    > after the car is driven for a while and turned off, a re-start is
    > problematic. Usually it will just crank and crank, but sometimes it will
    > spit and cough. After waiting until the car has cooled down, like
    > overnight, it will start right up and drive smoothly, with no stalling
    > or other problems. There are no trouble codes stored, nor does the CEL
    > come on. The car has about 106K miles, and the plugs, timing belt, etc.,
    > have been recently replaced, with no change. The gauges, dash lights,
    > etc. all work correctly.
    > Anyone have any ideas for me?
    > Thanks,
    > S


    Max & Ted sound like they are quite knowledgeable here but I have had
    cold start/warm start sensors that can affect cold or in your case
    warm start problems,but I am unsure if these are used on your
    application just a thought.

  6. #6
    Bob Shuman
    Guest

    Default Re: 1999 Chrysler LHS starting problems

    I've never seen a defective Coolant Temperature Sensor actually prevent
    starting, but have observed the case where an already warm engine is
    difficult to start (the spit and cough referenced?) because the defective
    CTS makes the ECU believe the engine is cool, so enriches the fuel mixture.
    When this happens, the engine temperature gauge usually does not read the
    correct temperature, the warm engine idles roughly, and the fuel mileage is
    noticeably decreased.

    Since it won't start at all, and there are no references to the other
    symptoms, I'd put my money on the cam or crank sensors.

    Bob

    "2oldskool55" <circles34a@yahoo.com> wrote in message
    news:71e22187-a049-413a-bdec-d5aa914922cf@k7g2000hsd.googlegroups.com...
    On Aug 13, 6:01 am, "Scott W." <swbus...@sbcglobal.net> wrote:
    > Hi,
    > I have a 1999 LHS which will not start when warm. If cold, the car
    > starts right up and drives smoothly, with no problems at all. However,
    > after the car is driven for a while and turned off, a re-start is
    > problematic. Usually it will just crank and crank, but sometimes it will
    > spit and cough. After waiting until the car has cooled down, like
    > overnight, it will start right up and drive smoothly, with no stalling
    > or other problems. There are no trouble codes stored, nor does the CEL
    > come on. The car has about 106K miles, and the plugs, timing belt, etc.,
    > have been recently replaced, with no change. The gauges, dash lights,
    > etc. all work correctly.
    > Anyone have any ideas for me?
    > Thanks,
    > S


    Max & Ted sound like they are quite knowledgeable here but I have had
    cold start/warm start sensors that can affect cold or in your case
    warm start problems,but I am unsure if these are used on your
    application just a thought.



  7. #7
    maxpower
    Guest

    Default Re: 1999 Chrysler LHS starting problems


    "Bob Shuman" <no_spam_thx@sbcglobal.net> wrote in message
    news:jBkpk.17906$cW3.17560@nlpi064.nbdc.sbc.com...
    > I've never seen a defective Coolant Temperature Sensor actually prevent
    > starting, but have observed the case where an already warm engine is
    > difficult to start (the spit and cough referenced?) because the defective
    > CTS makes the ECU believe the engine is cool, so enriches the fuel

    mixture.
    > When this happens, the engine temperature gauge usually does not read the
    > correct temperature, the warm engine idles roughly, and the fuel mileage

    is
    > noticeably decreased.
    >
    > Since it won't start at all, and there are no references to the other
    > symptoms, I'd put my money on the cam or crank sensors.
    >
    > Bob
    >
    > "2oldskool55" <circles34a@yahoo.com> wrote in message
    > news:71e22187-a049-413a-bdec-d5aa914922cf@k7g2000hsd.googlegroups.com...
    > On Aug 13, 6:01 am, "Scott W." <swbus...@sbcglobal.net> wrote:
    > > Hi,
    > > I have a 1999 LHS which will not start when warm. If cold, the car
    > > starts right up and drives smoothly, with no problems at all. However,
    > > after the car is driven for a while and turned off, a re-start is
    > > problematic. Usually it will just crank and crank, but sometimes it will
    > > spit and cough. After waiting until the car has cooled down, like
    > > overnight, it will start right up and drive smoothly, with no stalling
    > > or other problems. There are no trouble codes stored, nor does the CEL
    > > come on. The car has about 106K miles, and the plugs, timing belt, etc.,
    > > have been recently replaced, with no change. The gauges, dash lights,
    > > etc. all work correctly.
    > > Anyone have any ideas for me?
    > > Thanks,
    > > S

    >
    > Max & Ted sound like they are quite knowledgeable here but I have had
    > cold start/warm start sensors that can affect cold or in your case
    > warm start problems,but I am unsure if these are used on your
    > application just a thought.
    >
    >


    It could go both ways, the coolant sensor could also tell the PCM that the
    engine is hot when it is cold. This will cause problems. Either way a good
    scanner and someone that knows how to use it will see the problem


    Glenn Beasley
    Chrysler Tech



  8. #8
    Bill Putney
    Guest

    Default Re: 1999 Chrysler LHS starting problems

    Bob Shuman wrote:
    > ...When this happens, the engine temperature gauge usually does not read the
    > correct temperature, the warm engine idles roughly, and the fuel mileage is
    > noticeably decreased...
    >
    > Bob


    That is in fact correct on this car since there is one temp. sensor that
    feeds into the PCM, from which signal the PCM both drives the gage and
    does the engine management.

    Bill Putney
    (To reply by e-mail, replace the last letter of the alphabet in my
    address with the letter 'x')

  9. #9
    Steve
    Guest

    Default Re: 1999 Chrysler LHS starting problems

    Scott W. wrote:
    > Hi,
    > I have a 1999 LHS which will not start when warm. If cold, the car
    > starts right up and drives smoothly, with no problems at all. However,
    > after the car is driven for a while and turned off, a re-start is
    > problematic. Usually it will just crank and crank, but sometimes it will
    > spit and cough. After waiting until the car has cooled down, like
    > overnight, it will start right up and drive smoothly, with no stalling
    > or other problems. There are no trouble codes stored, nor does the CEL
    > come on. The car has about 106K miles, and the plugs, timing belt, etc.,
    > have been recently replaced, with no change. The gauges, dash lights,
    > etc. all work correctly.
    > Anyone have any ideas for me?
    > Thanks,
    > S



    Will it fire right up if you crank it with the accelerator held to the
    floor (just like clearing a flooded condition on a carbureted car)? If
    so, you probably have a leaky fuel injector.

    If not, check the fuel pressure. The fuel pump could be in the early
    stages of failing and may not start running when its hot.


  10. #10
    Bill Putney
    Guest

    Default Re: 1999 Chrysler LHS starting problems

    Greg Houstong wrote:
    > Bill Putney wrote:
    >> Bob Shuman wrote:
    >>> ...When this happens, the engine temperature gauge usually does not
    >>> read the correct temperature, the warm engine idles roughly, and the
    >>> fuel mileage is noticeably decreased...
    >>>
    >>> Bob

    >>
    >> That is in fact correct on this car since there is one temp. sensor
    >> that feeds into the PCM, from which signal the PCM both drives the
    >> gage and does the engine management.

    >
    > Since the engine instruments are all computer driven, would a bad temp
    > sensor also show erroneous temperature readings on the engine
    > temperature guage?


    That was my point ("...there is one temp. sensor that feeds into the
    PCM, from which signal the PCM both drives the gage and does the engine
    management.").

    Bill Putney
    (To reply by e-mail, replace the last letter of the alphabet in my
    address with the letter 'x')

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