Stuck injectors?

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Fusterated lowmax owner, Oct 5, 2016.

Page 2 of 2
  1. Heavyd

    Heavyd Road Train Member

    Joined:
    Feb 4, 2009
    Messages:
    7,770
    Thanks Received:
    6,210
    0
    They have to be disassembled. Sadly, all it would take would be a quick wipe with some carb cleaner to get that gummy gunk out/off, but it would require an injection shop to do this.
     
    Heavyd, Oct 5, 2016
    #11
  2. little cat 500

    little cat 500 Road Train Member

    Joined:
    Jan 17, 2010
    Messages:
    2,048
    Thanks Received:
    1,094
    Location:
    Abbottstown PA
    0
    will it try an start with starting fluid
     
    little cat 500, Oct 5, 2016
    #12
  3. BoxCarKidd

    BoxCarKidd Road Train Member

    Joined:
    Aug 26, 2014
    Messages:
    4,469
    Thanks Received:
    6,504
    0
    That is interesting!
    I have a question on a DDEC V farm truck is parked for weeks and or months at a time. Maybe related to this
    Tends to show codes like this: Inj. 1 Valid above normal Sid:1 FMI: 0 16X.
    Inj. 6 valid above normal. Sid 6 FMI 0 7 X.
    Inj. time rail, valid above normal Pid: 156 FMI 0 4X
    It misfires and blows smoke under load at times. The it clears up and runs fine at all other times.
    Could that be related to a sticking injector issue or something else?
    Not meaning to step on Lowmax but wondering that same question of cleaning them and this one is still running?
     
    BoxCarKidd, Oct 5, 2016
    #13
  4. Superhauler

    Superhauler TEACHER OF MEN

    Joined:
    Jan 30, 2010
    Messages:
    12,209
    Thanks Received:
    100,730
    Location:
    keep stroking.
    0
    Is it pushing enough fuel to injectors? If the fuel pressure isn't enough it won't fire. Does the Detroit's have a check valve in the line somewhere? Or maybe the fuel pump is weak.
     
    Superhauler, Oct 6, 2016
    #14
  5. wore out

    wore out Numbered Classic

    Joined:
    Jun 5, 2013
    Messages:
    15,875
    Thanks Received:
    192,022
    Location:
    CHASIN THE DEVIL'S HERD
    0
    There is a check valve on the back of the 12.7 head. I would want to see the injector pulse in the data display screen of the scan tool tgere using or the poor boy way a noid light hooked to the injector solenoid while cranking. I agree they could be stuck. The only way to know is make sure ECM is firing them, proper fuel pressure while cranking and looking in the tank for bubbles in the return. It could be electrical just as easy
     
    wore out, Oct 6, 2016
    #15
  6. Ristow

    Ristow Road Train Member

    Joined:
    Jun 28, 2014
    Messages:
    1,314
    Thanks Received:
    1,996
    Location:
    Fema Region 5
    0
    Check the power supply wires to the computer , and the fuses.
     
    Ristow, Oct 6, 2016
    #16
  7. ClineER

    ClineER Light Load Member

    Joined:
    Apr 27, 2016
    Messages:
    229
    Thanks Received:
    139
    Location:
    N.E. Oklahoma
    0
    I have Installed new old stock motors with stuck injectors, added alot of power service additive and after getting it through fuel system it cleaned up. Just a thought.
     
    ClineER, Oct 6, 2016
    #17
  8. Fusterated lowmax owner

    Fusterated lowmax owner Bobtail Member

    Joined:
    Oct 5, 2016
    Messages:
    6
    Thanks Received:
    0
    0
    Finally got a call back from garage, yes the truck did fire with starting fluid ,but still seems to think its stuck injectors I have offered these suggestions to the shop foreman to check out before we go ahead with replacing thank you everyone!! Hopefully this can be resolved soon. May we all find something to be grateful for this Thanksgiving , me I'm grateful for all your offerings of helpful advice :)
     
    Fusterated lowmax owner, Oct 6, 2016
    #18
Page 2 of 2