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no fire 3406e

Discussion in 'Trucks' started by Beetle_Spin, Nov 20, 2022.

  1. Beetle_Spin

    Beetle_Spin Well-Known Member

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    iv got a 1999 3406e it has great fuel pressure on a gage gets 70 when turning over then drops to 0 when it stops jand primer is stiff and can hear the fuel regulator "whineing when pumping" it is acting like it wants to fire up but just wont fire up on either gas wd40 nothing any ideas
     
  2. Coaldust

    Coaldust Senior Member

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    Has the tach been acting wonky? Does the tach work while cranking?
    Codes?
    How has it been running lately?
    Serial #?
    Check the ECM fuse?

    Try tapping on the cam sensor. But don’t break it. She’ll fire right up. Guaranteed, or your money back.
     
    Vetech63, mg2361 and 92U 3406 like this.
  3. Truck Shop

    Truck Shop Senior Member

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    He want's his money back.
     
    Vetech63 likes this.
  4. Beetle_Spin

    Beetle_Spin Well-Known Member

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    tac moves when cranking changes the speed sensor i believe its the one at the bottom of the motor at the driver side didnt change anything all fuses are good and problem is its been sitting for a few years we are just at a dead end on ideas
     
  5. Coaldust

    Coaldust Senior Member

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    Cam sensor is on top of the front cover driver side. You are pounding on the wrong sensor.
     
  6. Coaldust

    Coaldust Senior Member

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    Maybe spin new fuel filters on her and a shot of fresh fuel?
     
    Vetech63 likes this.
  7. Vetech63

    Vetech63 Senior Member

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    The fuel is crap I bet.
     
    mg2361 and Truck Shop like this.
  8. Truck Shop

    Truck Shop Senior Member

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    What's the serial # as Nige would ask. WD40 or gas is a bad substitute for diesel fuel.
    Change filters get a clean bucket of fuel and draw from that. It might build pressure but can't
    expect it to run on crap fuel. Hopefully no old bio fuel in it.
     
    mg2361 likes this.
  9. Mobiltech

    Mobiltech Senior Member

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    Check your ecm wires for live power and keyed power. I don’t have a schematic up for it but I think 70 is keyed power and 48, 52 are live to battery.
    There will likely be an ecm fuse in the battery box too.
     
    Nige likes this.
  10. Truck Shop

    Truck Shop Senior Member

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    3176B, C-10, C-12 and 3406E share engine and roughly same vehicle harness wiring tp to 6TS-1 3406.
    Check ECM power and ground connections with ignition key on. Battery voltage at ECM connector P1/J1
    pin-6 + battery to pin-5 -battery should be 11.0 to 13.5 volts. Pin 4 is unswitched +battery.
    Make sure fuel injector connector J5/P5 at top of cylinder head is clean and connected.
    #6 pin is key switched and should have a breaker, #4 pin is unswitched off the battery and has a breaker.
     
  11. funwithfuel

    funwithfuel Senior Member

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    Does this thing have Jakes? There should be a pair of 10 amp fuses off the starter iirc in nice little fuse holders. Make sure you have power at both ends, not just a fuse that looks good. As mentioned earlier check the connections at the ECM.
     
  12. Junkyard

    Junkyard Senior Member

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    I had a truck, Pete, that had good fuses and all the wiring checked out. Got to fiddling with the fuse panel while cranking…..not sure why I did that….boom she busted right off. Evidently windshield had been leaking and there was corrosion on the backside of the fuse panel and my wiggling things around woke it up.

    Also, just because you have juice doesn’t mean you have a good ground. KW’s are notorious for ground issues, at least in my experience.
     
    Vetech63, sled dog and Coaldust like this.
  13. Coaldust

    Coaldust Senior Member

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    Good point, Junkyard.
    Especially if Beetle_spin had the batteries out of it and missed one of the very many wires hooked up all over the place.
     
    Vetech63 likes this.
  14. Beetle_Spin

    Beetle_Spin Well-Known Member

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    ill have to check it out this afternoon been rainy the past few days here i drained all the old fuel and got new fuel started with 5 gallons in a can to no avail it has great pressure off a gage hooked to the fuel base get around 60 or 70 cranking but drops to zero when stoped ill have to check the ecm pins to see what has power and what dosent also check the fuse block id almost bet somthing is coroded idk what the part is at the bottom is than yall are saying the speed sensor is on top at the front iv got a idea of what sensor or plug is there but ill take a look this afternoon also the serial starts with 2ws id have to get the full serial later
     
  15. Nige

    Nige Senior Member

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    I sent you the electrical schematic for a 3406E 2WS-prefix
     
    Truck Shop likes this.
  16. Truck Shop

    Truck Shop Senior Member

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    The 2WS would have the cam/rotation sensor on the back side of front structure behind air compressor.
    The early 5EK had the cam/rotation sensor mounted to the upper outside edge of structure. IIRC 97 or
    98 was the last years for that style.

    Nige--was the schematic SENRS5574-04 Jan 1999, that's what is printed on mine?
     
  17. Nige

    Nige Senior Member

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    SENR5574-04 doesn't cover 2WS-prefix engines, at least they are not listed on the cover page. The schematic I found for 2WS was RENR2337-08 dated March 2021.

    Comparing the two schematics the ECM power pinouts are very different. On RENR2337 it shows unswitched power on Pins 48, 52, & 53, plus switched power from the key on Pin 70.
     
    Last edited: Nov 28, 2022
  18. Truck Shop

    Truck Shop Senior Member

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    Thank you Nige.

    Would the OP-disregard my post #10.
     
    Beetle_Spin likes this.
  19. Truck Shop

    Truck Shop Senior Member

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    Strange both SENR5574-04 and RENR2337-08 reference the same engines according
    to Nige.
     
  20. Nige

    Nige Senior Member

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    Broadly speaking similar engine models between the two schematics but not 100% identical.
    Also the list of engine S/N prefixes listed in the two schematics are completely different.
    upload_2022-11-28_17-34-45.png
    upload_2022-11-28_17-35-20.png
     
    Truck Shop likes this.