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Ωhm

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Everything posted by Ωhm

  1. Ωhm

    LLBWS CHAMPIONSHIP

    Ωhm posted a topic in The Pub

    GO MICHIGAN. Taylor MI vs Hamilton OH
  2. Ωhm
    When connected, both C139_C(Fuel Pump Motor) & C139_B(Fuel Gauge Sender) use C139_A to find vehicle ground. This must be repaired. I know you tried grounding it, but something ain't right. Question: When you power up the Fuel Pump have you tried to START the vehicle?
  3. Ωhm
    C139_B on the fuel pump side is for the fuel level gauge in the dash. Using this terminal somehow your finding fuel pump motor ground. Maybe next step should be remove fuel pump/sender unit from the tank. Lets see which wire goes where.
  4. Ωhm
    If the pump works using the battery and the vehicle wiring harnesses check out OK, then I would think the Fuel Pump should run just fine. Seems like I'm missing something. Need more eyes on this.
  5. Ωhm
    Were these voltage readings taken with C139 disconnected? Reason for asking is next step will be to connect C139, backprobe C139_C and take both measurements again. Looking for Voltage Drop on Fuel Pump Motor circuit. Leave Fuel Pump Ballast Resistor bypassed. No. Possible to get a beep if you went from C139_A (fuel pump side) and case ground on the fuel pump itself.
  6. Ωhm
    I'm going to stop using the term B+. My meaning was for Battery Voltage. The ECU receives Battery Voltage from the Fuel Pump Relay for the INJ Feed circuit. The 88 Electrical Manual should have the same set up as your 90. _mj1988electricalmanual_1.pdf
  7. Ωhm
    C201_C11 & C201_D10 both are INJ FEED circuits for the ECU. B+ from the Fuel Pump Relay.
  8. Ωhm
    No need if properly bypassed. When disconnected should see NO voltage.
  9. Ωhm
    With B+ on C157_F connect connector back up. Disconnect C139 at the Fuel Pump and measure for B+ at C139_C. If circuit test good measure for continuity between C139_A and a good ground. Looking for ≈0_Ω.
  10. Ωhm
    Doors aren't the best place for grounding. Use under the dash and on the medal. Should see some grounding lugs there. Make sure Fuel Pump Ballast Resistor is good and correctly connected or properly bypassed. Measurement takes into account the Fuel Pump Relay is still jumpered.
  11. Ωhm
    With Fused jumper wire jump Fuel Pump Relay Pins_30(1)&87(4) again. Listen for Fuel Pump. If no Fuel Pump action, disconnect C157. With jumper still in place measure for B+ on C157_F(ORN), engine or IP side of harness.
  12. Ωhm
    Using a voltmeter or 12vdc testlight (preferred) check for B+ on the following pins (use battery negative terminal for ground): D1_5: B+ (Hot at all times) D2_4: B+ (Hot during KEY ON/CRANKING). D1_6: KEY ON (B+ (Hot for 2-3 seconds)) or CRANKING (B+ (Hot during CRANK)).
  13. Ωhm
    I was just thinking swapping relays is a method used for troubleshooting. Your testing on the D1_D2 connector should have proved out the Fuel Pump Relay. Maybe cleaning the coil contact did more good for ya.
  14. Ωhm
    This makes me wonder.
  15. Ωhm
    Using a voltmeter or 12vdc testlight (preferred) check for B+ on the following pins (use battery negative terminal for ground): D1_5: B+ (Hot at all times) D2_4: B+ (Hot during KEY ON/CRANKING). D1_6: KEY ON (B+ (Hot for 2-3 seconds)) or CRANKING (B+ (Hot during CRANK)).
  16. Ωhm
    Make sure you got full swing on your throttle plate or its not loose, in the throttle body. You'll need to look. Could just be a mechanical issue.
  17. Ωhm

    ouch...

    Ωhm replied to Pete M's topic in The Pub

    Get back here to Detroit. They got these street corner pharmacies that will sell you things call “Happyoids”. Then, you may think your flying back to Atlanta, when your really driving.
  18. Ωhm
    @Barnes2001 Need to know here.
  19. Ωhm
    @BlueJeans KEY OFF. Depress brake pedal. Using T/S SW set to RH side, can you turn OFF the RH rear bulbs? Try same thing for the LH side.
  20. Ωhm
    Do the Brake Lights work?
  21. Ωhm
    Fuel trim numbers, both long or short, do two (2) things. Add fuel or subtract fuel from the INJ PW time. 128 is the centering point for this decision. Numbers less than 128 take time OFF the INJ PW (engine running RICH, calls for less fuel), while numbers greater than 128 add time ON the INJ PW (engine running LEAN, calls for more fuel). Your fuel trim numbers tell me your engine is running RICH and fuel trim is calling for less fuel. NOTE: Your numbers are well within the range of authority for the ECU and would be considered normal. Back to guessing again since you don’t seem to be running LEAN, check your fuel pressure gauge for accuracy. If your gauge checks out good, than I’m barking up the wrong tree.
  22. Ωhm
    No. Using REM what are your ST&LT fuel trim numbers? My guess is your running LEAN or you got a faulty fuel pressure gauge.
  23. Ωhm
    Green Left: OFF Green Right: TEMP
  24. Ωhm
    Is that as low as you can go on the adjustment?
  25. Ωhm
    Yeah, I’ve witnessed that ON/OFF highway stunt. Flying down the highway, being instructed to exit highway, drive through downtown small town just to be told go back on the highway. What a joke.
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