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  1. tmoss

    TB overbore

    just buy a 70mm and be done with it......
  2. tmoss

    N-41 AFM with 1.7 RR's

    exactly and if your real crafty, you'll check all the piston deck heights and use the most negative deck height piston to check with clay........
  3. tmoss

    What voltage at ECT connector?

    pull the neg battery cable to reset KAM and start anew...... you'd think a data logger would have an input impedance high enough to not pull down vref.
  4. tmoss

    What voltage at ECT connector?

    "shorts" don't present 92k ohms of resistance, but it could represent a "parallel" path that would result in a resistance seen at the EEC less than half of the lowest resistance value in parallel. I suspect the sensor was still plugged in but he'll have to verify.
  5. tmoss

    explain theory of intake spacer

    thermal coatings on the bottom and inside the runners would help keep the air charge cooler. Flat black bodies radiate heat the fastest, so a flat black coating outside the intake might help too.
  6. tmoss

    What voltage at ECT connector?

    sounds too high - what was the temp of the engine? Now measure the resitance of the sensor itself to see if it is anywhere close to 97k ohms
  7. tmoss

    Fuel in the intake mani and TB

    a leaking fuel pressure regulator diaphragm that is leaking gas into the intake through the vacuum hose
  8. tmoss

    smoking wire, REALLY slow cranking

    agreed - I took my neg cable off the timing cover and the threads inside the cover were corroded to heck - high resistance connection which caused the bulk of the current to use the smaller ground wire as the return path = smoking wire.
  9. tmoss

    explain theory of intake spacer

    you must not have coolant water flowing through an EGR spacer - if ther is, the intake will be reasonably close to coolant temp. It will defeat to some degree the cooling function of the spacer. the lower will be closer to oil temp as it has oil hitting it along it's length from the lifter valley.
  10. tmoss

    What voltage at ECT connector?

    The proper voltage to find at the ECM for ACT/ECT is 5vdc plus/minus ~15% Why does he have to cut wires - why can't he pull the ECM connector and check the resistance path between the pin connectors with the sensors hooked up? That tests the entire harness and sensor path for each sensor...
  11. tmoss

    What voltage at ECT connector?

    that sounds like a valid test and results. based on Joel's reminder that the power supply for those sensors is seperate from vref, you might have a problem in the EEC. I'm not 100% sure what the voltage to those sensors should be now, but I'd guess it would be 5.0vdc rather than another...
  12. tmoss

    What voltage at ECT connector?

    yes, the difference is two wire sensors and three wire sensors. I forgot the ECT/ACT are not fed from vref like the others. Still, he needs to do a check of all connections. Since the ACT and ECT are monitored for resistance, he may need to use the ohm-meter function to check connections.
  13. tmoss

    What voltage at ECT connector?

    Prob not a true "short" but it very could be a low resistance return path that would load down the vref voltage regulator and lower the vref voltage. I don't know if the regulator has a protective feature in it, but if you run vref regulator at it's highest output, it could cause eventual failure.
  14. tmoss

    What voltage at ECT connector?

    litterally I meand you take the low voltage probes and on the same wire, you measure voltage drop on that single wire through the connector(s) from the EEC vref pin to each sensor/MAF. It's not real quick to do, but it shows up connections that are too high in resistance well.
  15. tmoss

    What voltage at ECT connector?

    you need to check all the connectors in the wirng path, both supply and return to see if you have a resistance in a connector that is knocking voltage down. With the circuit in use, you can do this with a voltmeter by reading voltage drop across each connector. Keep tabs of the drop at each...
  16. tmoss

    Guide Plates???

    the sbc set is used...........
  17. tmoss

    Ceramic vs chrome headers

    my Jet-Hot coated MAC P headers are 6 years old and other than getting a little "milky" in color, they still look great.
  18. tmoss

    Guide Plates???

    If you're going to use 1.7 rockers, be aware that the Isky guide slots may not be deep enough and the pushrod may hit them near the top of the lobe lift and make noise. Isky is aware of this problem and was going to make some adjustable guides with .100" deeper slots - I got tired of waiting...
  19. tmoss

    What voltage at ECT connector?

    there is a 5vdc vref regulator in the EEC that supplies the voltage for all the sensors. 3.98vdc sounds low.
  20. tmoss

    No Hook at Launch. Need advice on Suspension Upgrades Please...

    option 2
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