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  1. joel5.0

    Can't get TPS voltage above .15 volts - part 2

    DVOM set in 200kΩ, measure resistance between green and orange pins in the TPS connector, sensor disconnected, and check how the resistance varies while you rotate the pot disk. LUK
  2. joel5.0

    Can't get TPS voltage above .15 volts - part 2

    Check the graphical description of the situation, analyze it and LMK what do you see different.
  3. joel5.0

    Can't get TPS voltage above .15 volts - part 2

    Nope.... it takes the possibility of an internal short to ground (= SIGRTN) in the TPS out of the picture, it only checks the actual voltage change through the variable resistor using an external ground reference point for the DVOM only.
  4. joel5.0

    Can't get TPS voltage above .15 volts - part 2

    Yep.... to ground..... and when I mention rotating it, I mean rotating the potentiometer cylinder with the TPS removed from the TB.
  5. joel5.0

    Can't get TPS voltage above .15 volts - part 2

    Redo the VREF-TP jumper voltage check, if the reading at the TP wire = VREF, you have another defective TPS or it might not be installed correctly on the TB. You need to make sure the TPS tabs are properly aligned with the the TB shaft, suggest to remove the TPS from the TB, connect it to the...
  6. joel5.0

    Can't get TPS voltage above .15 volts - part 2

    Codes 44 & 94 are not CM codes, they are KOER codes exclusively. 90topdown....... the following is the potentiometer diagram of the TPS..... Since in one of your previous tests you confirmed the presence of VREF at the TP wire when a jumper wire was installed, I suggest the following...
  7. joel5.0

    retarded cam -4, now no running...

    Retarding it from what set point?...... was it +4°, +5°, +6° set initially?..... are you looking for a split overlap setting?...... My point is, how can you (or your buddy) estimate a possible gain, if the initial set point position is unknown?
  8. joel5.0

    Can't get TPS voltage above .15 volts - part 2

    The fact that a TPS code (any) does not show up in a KOER + the sign it runs the full test (codes 44 & 94 = system pass when thermactor system is disabled)..... does point to an intermittent wiring or ground problem. Suggest to monitor the TPS signal wire voltage near the ECM connector with the...
  9. joel5.0

    Can't get TPS voltage above .15 volts - part 2

    From the results of both tests, you might be involved in a "witch hunt"........ trying to fix a nonexistent problem. A TPS signal reading at the ECM below .49 vdc will cause codes 23 and 63 to get logged + a KOER self test would not run due to the "hard failure" code the TPS will cause. Code 67...
  10. joel5.0

    WHAT INJECTORS DO I NEED

    SN95's are the exception, they do have datastream capabilities.... including short and long term fuel trim data/ bank. Did two '95 TwEECer tunes, using a a WB + centering STFT and LTFT values near 0% for both banks using my Genisys scanner.
  11. joel5.0

    MAF code 26 problem need help!

    Code 26 as a KOEO = MAF exceeded its .7 vdc maximum Code 26 as a KOER = MAF is outside its .2 - 1.5 vdc operating range during a KOER.
  12. joel5.0

    MAF code 26 problem need help!

    FYI....
  13. joel5.0

    Replaced TPS Sensor - still get .15 volts ???

    Q here....... if the TPS signal is below .49 vdc, why isn't a code 63 showing in a KOEO? Code 21 and 24 are usually "engine too cold for a KOEO" condition codes. Suggest to plug everything back, clear ECM memory, start engine and let it reach op temp, rerun a KOEO and KOER and LUK.
  14. joel5.0

    Replaced TPS Sensor - still get .15 volts ???

    Warranty that TPS replacement.
  15. joel5.0

    F303 cam questions

    The stock E7/GT40p/GT40 (explorer) exhaust valve springs, regardless of mileage, will bind @.510" lift. Add that to the fact that the pressure rate to control the valves with the "cheerleader" cams lobes profiles is not part of the stock springs either, and you have a cam-valve train...
  16. joel5.0

    Replaced TPS Sensor - still get .15 volts ???

    The internal regulator in the ECM will take the abuse of a shorted to ground VREF circuit. Same goes with the individual 5 vdc based signals like the ECT and ACT. That electronics design is old, but it can handle some abuse.....:D .... besides, that is the pinpoint SOP including OBD-II configs. ;)
  17. joel5.0

    F303 cam questions

    Any of the "cheerleader" cams have too much lift or lobe profile, for the stock valve train to control it.
  18. joel5.0

    Replaced TPS Sensor - still get .15 volts ???

    A very quick way to check it, is to simply install a jumper between VREF and TP signal terminals in the TPS connector, sensor disconnected..... and check the reading at the ECM connector TP signal wire. You should also confirm that a code 53 and or 23 is logged in a KOEO with the jumper...
  19. joel5.0

    cam issue

    Does the cam changes the times it idles w/out any problem?........ You can use that cam with an EFI setup, but you need to ID what is really causing the current problem, not gue$$.
  20. joel5.0

    cam issue

    FYI...... E-303 (CARB exempt cam) = 220°/220° .498"/.498" 110 LSA 110 intake center line 35-440-8 = 220°/220° .512"/.512" 110 LSA 106 intake center line .... or more aggressive lobes than the E-303 however, the valve events @.050" and overlap, are the same as the E-303 advanced 4°. Need...
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