cummins isx new turbo and thrownig code

Discussion in 'Trucks [ Eighteen Wheelers ]' started by gregor, Dec 26, 2012.

  1. gregor

    gregor Light Load Member

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    May 13, 2011
    chicago,il
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    i have a 06' isx 475 , yesterday it got new turbo plus short exhaust pipe right after, since then i see in diagnostic faults exhaust gas temp. electrical fault...MID140 PID173 FMI5 ????? look under the hood and found this on new exhaust pipe after the turbo spouse to be a sensor ??? where mechanic put some bolt instead and welded, was he right???? he explained to me that sensor is expensive and has nothing to do to my engine/economy ??? any ideas?? dont relly like any codes on my dash...thanx
     
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  3. Shaggy76

    Shaggy76 Heavy Load Member

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    Feb 22, 2012
    Orlando, FL
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    Fire that mechanic. You need that sensor for your engine has to monitor EGTs to prevent piston melt. Cummins sees that and kiss warranty goodbye. You don't want that with a new turbo. That sensor helps control fuel flow. If EGTs are too high, fuel flow drops some to lower combustion heat. Yes the sensor is pricey, almost $150, but it's really important.
     
    gregor Thanks this.
  4. Ramblin' Man

    Ramblin' Man Light Load Member

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    Dec 27, 2012
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    He is talking about pyrometer probe - it is not connected to the engine, ISX has its own Exhaust Pressure Sensor located on the thermostat housing. It's probably Volvo truck and dashboard computers are throwing those codes. Still, pyrometer readings used to be the most important info for a real trucker
     
  5. gregor

    gregor Light Load Member

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    May 13, 2011
    chicago,il
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    hi, yes thats 06' volvo vn, and this is sensor right after turbo on exhaust pipe (under air filter assembly close to firewall ) , Shaggy76 you saying i need this sensor its relly important?!?!?! this is the same answer from my two friends also volvo/cummins owners i called at night, i did 400 miles on new turbo and thing i see on dash gauge that turbo is kicking fatser (response) then old one which probably will hurt my mpg?!?!?! even when parked and little tap on throttle (to 700-900 rpm) and boost will rise little bit, i havent that on old turbo
     
  6. Ramblin' Man

    Ramblin' Man Light Load Member

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    Dec 27, 2012
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    The thing about PYROMETER is that if you drive your own truck for longer time (like few years or so) and you learn to pay attention to that gauge over time - you will notice if the readings go higher or lower then they used to be. It will indicate problems with air/fuel ratio. On ISX it might be first indication of VGT Turbo going bad or EGR malfunctions, sometimes even before Check-Engine light comes on. Problem with the Volvo dashboard is that the gauge is very small, but still, this gauge is the most important diagnosing device if you care about your motor. The reason why your mechanic and your trucker friends don't see it that way is because times are changing and even truck owners don't pay attention to their equipment like they they used to - which is also why the gauge don't even exist on most cheap trucks, it becomes an optional add-on, even on new Peterbilts.

    I would recommend you buy aftermarket pyro and learn how to use it - Teltek makes nice one
     
    Last edited: Dec 27, 2012
    t800kwopper Thanks this.
  7. gregor

    gregor Light Load Member

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    May 13, 2011
    chicago,il
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    ok since i put new turbo i did about 4000 miles, truck pulls realy good, mpg is good as well , still can see in my right mirror blow outs from exhaust shifting gears, when taking off hard with 40k + load or going uphill can hear horrible noise shhhhzzzzzzzzzzz on full about 31 psi boost?????? no air leaks, no higher colant temp been found, oil temp betwen 209-225, egr unpluged......mechanic says also without gas temp sensor it wont mees up if my egr is unpluged or breaks down on the road ??? in his opinion i will have to keep egr in working order all the time ( spending money) if that sensor is mounted, deal with higher coolant temp. and have lower mpg etc. ....still i dont know if i should spend another $$ to put that sensor ??? my engine has 1,120.000 miles no overhaoul, no crankshaft bearings been changed, recently did oil sample which looks very good....any ideas??
     
  8. pawpaw1

    pawpaw1 Medium Load Member

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    Sep 9, 2011
    Dallas,Ga.
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    I agree with the previous poster. Fire the mechanic. He is wrong about the pyro , and wrong about unplugging the EGR. If you're going to run without the EGR , you should have an EGR delete done. $$$$$
    in the meantime , unplug it correctly. Wait until engine is cold , turn the key to ON , but don't start the engine. Walk around to the EGR , and unplug. You're now good to go.
     
  9. gregor

    gregor Light Load Member

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    May 13, 2011
    chicago,il
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    ok thank you guys , im consider to do that....but do you think no gas temp. sensor or improper turbo mountage or wrong egr unplug cousing that strange sound???
     
  10. gregor

    gregor Light Load Member

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    May 13, 2011
    chicago,il
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    by the way where to do egr delete and how much $$$$ , anyone did it already ,if so please share poistives and negatives
     
  11. pawpaw1

    pawpaw1 Medium Load Member

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    Sep 9, 2011
    Dallas,Ga.
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    Do you have a single exhaust , with the stock muffler ? That noise you're hearing could be the restrictive sound of too much gas , trying to get out of too small an exhaust system.
    I know I've heard some of those single stack jobs , under load , and yea , they sound terrible.
     
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