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Problem idling (raising the idle with cruise) to run A/C

Discussion in 'International Forum' started by paul_4lp, Jul 5, 2014.

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  1. Jul 5, 2014 #1
    paul_4lp

    paul_4lp Road Train Member

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    Fort Myers, FL
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    Hi all! I'm having a issue with my A/C on a 2013 Prostar ( coolant & oil is full)

    where it will only cool when the fan kicks on , when the temp reads under 170f there is no issue , but once it gets above ...the A/C temp will not say at the normal 45-50F it usually puts out

    I'm only idling at 600 RPM and I am not able to "bump" the idle up using the cruise buttons
    if I hold the petal at 1200 or so I can hear the fan kick on & then see the temp drop from 60-70 f to 45-40F

    any ideas ? Is there a relay under the passenger dash for idle/ cruise ( cruise does work on highway speeds)
     
    paul_4lp, Jul 5, 2014
    paul_4lp, Jul 5, 2014
    #1
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  3. Jul 6, 2014 #2
    snowwy

    snowwy Road Train Member

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    the truck is probably programmed and you may be out of luck.

    look online for a brake pedal lock. or steering wheel holder. don't remember the name but it's a automotive tool. you can put stick under the steering wheel. and adjust it to push the gas pedal down.

    it's basically used to lock the steering wheel to the brake pedal. holds the steering wheel in position while holding the brakes down. used when doing alignments on cars.

    freightliner programming. is to have the yellow valve out. cruise switch on. hit the plus button and idle jumps to 800. only way to make the truck idle. and it's probably programmed that way.
     
    snowwy, Jul 6, 2014
    snowwy, Jul 6, 2014
    #2
    paul_4lp Thanks this.
  4. Jul 6, 2014 #3
    paul_4lp

    paul_4lp Road Train Member

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    Yeah sane here with some other companies pro stars , but mines never bump idled , had the truck for 200k miles never had an issue with the A/C cooling @ 600 rpm , but other posts on here say you need to idle @ 1000 to keep it cool
     
    paul_4lp, Jul 6, 2014
    paul_4lp, Jul 6, 2014
    #3
  5. Jul 6, 2014 #4
    cabwrecker

    cabwrecker The clutch wrecker

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    Should be easy enough, Swift has over 3,000 of them.
     
    cabwrecker, Jul 6, 2014
    cabwrecker, Jul 6, 2014
    #4
    joseph1135, semi retired semi driver, Joetro and 1 other person Thank this.
  7. Jul 6, 2014 #5
    cabwrecker

    cabwrecker The clutch wrecker

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    Hey Paul, Lemee know if you can't get that thing running right. I've gotta guy at an INT shop I can get in contact with, he'll get you sorted out. Been meaning to buy him a beer, anyhow.
     
    cabwrecker, Jul 6, 2014
    cabwrecker, Jul 6, 2014
    #5
    paul_4lp Thanks this.
  8. Jul 6, 2014 #6
    paul_4lp

    paul_4lp Road Train Member

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    Fort Myers, FL
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    Got it rigged up with a tread depth gadge right now ....

    Better solution would be great !
     
    paul_4lp, Jul 6, 2014
    paul_4lp, Jul 6, 2014
    #6
  9. Jul 6, 2014 #7
    DustyRoad

    DustyRoad Road Train Member

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    I heard Crete has some serious problems with their no idle a/c ..... engine must be off to use it... just wondering if you're driving for crete?
     
    DustyRoad, Jul 6, 2014
    DustyRoad, Jul 6, 2014
    #7
  10. Jul 6, 2014 #8
    paul_4lp

    paul_4lp Road Train Member

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    Fort Myers, FL
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    No ... I can idle ALL I want !

    problem is the engine fan is not kicking on ...thus the A/C runs warm

    if I hold the RPM's to 1000-1200 the fan will run then it gets cold
     
    paul_4lp, Jul 6, 2014
    paul_4lp, Jul 6, 2014
    #8
  11. Jul 6, 2014 #9
    Heavyd

    Heavyd Road Train Member

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    It could also be a low charge and since the compressor is running faster at a 1000 vs idle the pressure is quicker to build up for better expansion valve operation and therefore colder temps. If the condenser does need increased air flow it may be simply dirty or partially plugged.
     
    Heavyd, Jul 6, 2014
    Heavyd, Jul 6, 2014
    #9
    paul_4lp Thanks this.
  12. Jul 7, 2014 #10
    DustyRoad

    DustyRoad Road Train Member

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    I suspect the engine control module has some flags. ie the idle restiction which does not allow you to set high idle speed is in need of a tune-up. The only other is the yellow brake release value could be de-activating the high-idle if the circut is on ( pushed in). BTW setting the brakes is the last thing we do when parking so that logic seams it would be a faultly switch, try pushing and pulling the brake release several times and see if it is an intermitten problem. sometimes cycling the key (with out turning to start) checks all the sensors and resets ECM faults. That procedure is in the owners manual. Turn the key and wait 5 sec, listen to the valve checks and fuel pump start before turning to start...the ECU is setting operational configurations.

    When all else fails, read the manual and consult the nearest dealer.
     
    DustyRoad, Jul 7, 2014
    DustyRoad, Jul 7, 2014
    #10
    paul_4lp Thanks this.
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