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P0325 Supercharged T4R

Discussion in 'Performance and Tuning' started by 95 taco, Oct 11, 2017.

  1. Oct 11, 2017 at 9:27 AM
    #1
    95 taco

    95 taco [OP] Battle Born

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    OME 883 front, OMD 3.5" rear, Relentless front bumper, smittybilt 9.5K winch
    OK guys, Supercharged 3rd gen T4R (5VZ-FE) 1st gen (gray) SC, getting a P0325 code at high RPM/Load driving, occasionally getting a P0330 code as well.
    I can reset the code and run it in park all day and not throw a code leading me to believe the truck is either running lean or pinging under load, there is some stumbling at ~3500 RPM.

    Any thoughts on what I should check first? 205K miles on it and I just got it running a few weeks ago after i bought it (leaking water pump, had it torn down to do water pump/timing belt)
    I'm thinking fuel filter and maybe spark plugs? planning on installing a wideband soon but finances are tight and I'm moving 1,200 miles in a week.
     
  2. Oct 13, 2017 at 6:50 PM
    #2
    Torspd

    Torspd Tor-nication

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    Check the plugs. Replace the fuel filter. Especially if it is original.
     
    95 taco[OP] likes this.
  3. Oct 13, 2017 at 7:05 PM
    #3
    95 taco

    95 taco [OP] Battle Born

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    17,466
    Vehicle:
    2003 4x4 TRD SR5 auto
    OME 883 front, OMD 3.5" rear, Relentless front bumper, smittybilt 9.5K winch
    If I don't work tomorrow I'll check the plugs, I attempted to replace the fuel filter on Wednesday but the front connection on it is rusted tight, I was able to remove the line from the tank into the filter though.
     
  4. Oct 22, 2017 at 11:10 AM
    #4
    95 taco

    95 taco [OP] Battle Born

    Joined:
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    Messages:
    17,466
    Vehicle:
    2003 4x4 TRD SR5 auto
    OME 883 front, OMD 3.5" rear, Relentless front bumper, smittybilt 9.5K winch
    Changed the plugs, they appeared to be original, NGK's on one side and Denso's on the other.
    Also changed wires and boots, no change.
    Drove 800 miles and had some weird stuff happen, first tank I averaged about 17 MPG and it went downhill from there, last tank I only got 8.2 MPG, no loss of power but the scan gauge was showing 50-60% load cruising and any hill at all it would jump to 99% load.

    Got home to my actual shop and attempted to replace the fuel filter again, filter had apparently been leaking slightly at the rear connection, front connection still locked tight so I went ahead and ordered a new fuel line from the front of the filter to the block (or wherever it goes, haven't really looked), while it's sitting I went ahead and ordered the knock sensor harness, gonna pull the SC and change the oil/bearings while I'm in there.
     
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  5. Nov 1, 2017 at 7:03 PM
    #5
    95 taco

    95 taco [OP] Battle Born

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    Vehicle:
    2003 4x4 TRD SR5 auto
    OME 883 front, OMD 3.5" rear, Relentless front bumper, smittybilt 9.5K winch
    Changed the fuel filter (as well as the fuel line on the block side of the filter) and MPG improved slightly but not like it should have.
    I have a slight drip from the back of the filter so tomorrow I'm gonna put a single wrap of teflon tape on the rear threads and see if it stops it.

    I disconnected the battery to reset the ECU to see if that would help as well.

    USPS is having issues delivering parcels due to my recent change of address so I still haven't gotten the S/C rebuild kit or knock sensor harness.

    After that stuff is done I think the next thing to look at will be replacing the stock pump with a wahlbro hi-flow.
     
  6. Nov 1, 2017 at 7:52 PM
    #6
    Torspd

    Torspd Tor-nication

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    Should be the last piece of the puzzle left, with the pump.
     
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  7. Nov 1, 2017 at 8:01 PM
    #7
    95 taco

    95 taco [OP] Battle Born

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    OME 883 front, OMD 3.5" rear, Relentless front bumper, smittybilt 9.5K winch
    After the pump I have to save some money (Technically I have 2 jobs currently but neither one is paying as I'm waiting on training for one job and a piece of equipment (mulcher for a skid steer) for the other) and I'll get a wideband so I can monitor better than with just the scan gauge.
     
  8. Nov 16, 2017 at 10:14 AM
    #8
    95 taco

    95 taco [OP] Battle Born

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    OME 883 front, OMD 3.5" rear, Relentless front bumper, smittybilt 9.5K winch
    Got OEM knock sensors, wiring harness, walbro 190 Fuel pump, no SC rebuild for now, gonna just change the oil and access the condition of it, most likely gonna try to rebuild it before the next engine oil change however.

    @Torspd what's your opinion of the URD 7th injector vs water/meth injection?
     
  9. Nov 16, 2017 at 10:38 AM
    #9
    Torspd

    Torspd Tor-nication

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    Torspd Custom Turbo kit [] Borg Warner 9180EFR Turbo [] Haltech Elite 2500 [] TiAL Q BOV [] TiAL V44 Wastegate @ 15psi [] CP Pistons [] CP Carrillo Rods [] ARP Head studs [] ARP Main Studs [] ARP Header - Head Studs [] Ported Heads w/ 1mm oversized valves intake/exhaust [] Brian Crower Forged Stroker Crank [] Darton M.I.D. Sleeved Block [] Kelford Camshafts [] Torspd 160* T-stat mod [] APR Large Fuel Rail [] Walbro 460 LPH E85 Fuel Pump [] FueLab FPR [] APR T56 Conversion Kit [] KP RACING Built T56 [] McLeod Racing Custom Twin Disk Clutch [] One Piece Aluminum Driveshaft [] MGW Shifter [] Custom lowering kit [] Ohlins Front Coilovers [] QA1rear shocks [] Custom Ron Davis Radiator [] Dual SPAL Electric Fans []
    Both need to be be controlled, both will wear the coatings off of the rotors, but only one needs constant refill.
     
  10. Nov 16, 2017 at 11:14 AM
    #10
    95 taco

    95 taco [OP] Battle Born

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    Vehicle:
    2003 4x4 TRD SR5 auto
    OME 883 front, OMD 3.5" rear, Relentless front bumper, smittybilt 9.5K winch
    Would you recommend the URD 6 injector kit over the 7th injector then?
     
  11. Nov 16, 2017 at 11:32 AM
    #11
    Torspd

    Torspd Tor-nication

    Joined:
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    The Great America!
    Vehicle:
    MMVI 4.4L 4x4 Access Cab
    Torspd Custom Turbo kit [] Borg Warner 9180EFR Turbo [] Haltech Elite 2500 [] TiAL Q BOV [] TiAL V44 Wastegate @ 15psi [] CP Pistons [] CP Carrillo Rods [] ARP Head studs [] ARP Main Studs [] ARP Header - Head Studs [] Ported Heads w/ 1mm oversized valves intake/exhaust [] Brian Crower Forged Stroker Crank [] Darton M.I.D. Sleeved Block [] Kelford Camshafts [] Torspd 160* T-stat mod [] APR Large Fuel Rail [] Walbro 460 LPH E85 Fuel Pump [] FueLab FPR [] APR T56 Conversion Kit [] KP RACING Built T56 [] McLeod Racing Custom Twin Disk Clutch [] One Piece Aluminum Driveshaft [] MGW Shifter [] Custom lowering kit [] Ohlins Front Coilovers [] QA1rear shocks [] Custom Ron Davis Radiator [] Dual SPAL Electric Fans []
    Your s/c didn't come with a charge air cooler. At this point, it is a practically a must have.

    Since you have a 5vz, you need the 7th for cooling, and the upgraded injectors if your current ones are at above ~85-90% duty cycle.
     

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