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  1. dennis112

    Electrical 12v switched source uder hood '65

    I am sure it depends on the year of the car BUT I found on a 66 that the heater fan motor has suitable key switched power. The wire would either need to be spiced into or a simple "Y" connector made with the original type Ford Bullet connectors be used. The Y allows you to unplug the...
  2. dennis112

    66 mustang differential yoke.

    There should be zero movement of the yoke, fore and aft or side by side. You should not need to tighten the nut as it is normally torqued at well over a hundred lbs. You might have someone with experience in differentials check it out. Are you sure that the U bolts are not loose?
  3. dennis112

    MSD 6a Cranking but no spark issue driving me crazy.....

    You can check if the MSD6a is working by disconnecting the red/green wire going to the distributor and then (with the key on) use a jumper across the red wire/green wire. Each time that you jumper it it should make a spark at the coil wire (it will only spark once for each time that you make...
  4. dennis112

    Oil Pressure Gauge swap

    The top tank isn't a good spot as it doesn't necessarily always keep the temp sender in coolant. (I use a side tank horizontal core radiator and that is where I got the idea.) You could put one on the bottom although it would/should read a cooler temp than the actual engine. The radiator does...
  5. dennis112

    Oil Pressure Gauge swap

    I have never seen a listing as to what the temps are in any location on the factory gauge. Its not intended to be a precision based system as one would normally pay attention to the deviations from what it would normally read. It might behoove you to add a modern gauge (even temporarily) in...
  6. dennis112

    Oil Pressure Gauge swap

    That is a nicely detailed engine compartment. Is there a particular incident when you see the "potentially higher" temps? Such as when cruising, in traffic or when idling?
  7. dennis112

    Oil Pressure Gauge swap

    The factory gauge/sending unit really doesn't have an exact calibration and are more to determine differences in temperature. It may be too warm but there is now way to know for sure without an external gauge I know of no such gauge that will work with the factory sensor and especially in...
  8. dennis112

    Oil Pressure Gauge swap

    I was looking at my engine's firewall bulkhead connector today and was wondering if that was were your were losing your signal . . . . We never know what previous owners have done to our cars (and often for those who keep our cars forever) regret the things that we might have done in the past.)...
  9. dennis112

    Oil Pressure Gauge swap

    Awesome find and it sounds like you should be good to go now. :) It was nice talking with you today and glad that all our work was fruitful. Take care of that beautiful, special car!
  10. dennis112

    Oil Pressure Gauge swap

    Can I call you? It might make things clearer. Above #?
  11. dennis112

    Oil Pressure Gauge swap

    Yes you can ground the sender wire and then it should peg the gauge. Make sure the key is in the "on" position when checking as the gitauge won't do nothing without it.
  12. dennis112

    Oil Pressure Gauge swap

    Your sending unit started at 10 ohms and started rising? Not possible. Either he meter leads are not making clean contact with the parts or the meter/leads are kaput. Also, DO NOT let your fingers stray onto the metal part of the ohm meter probes as that definitely affects the readings as...
  13. dennis112

    Oil Pressure Gauge swap

    I did a resistance test of the functional sending unit on my car. From stud to the unit's case I get 5800 ohms. That may vary based upon the manufacturer and may not mean anything other than the unit is not shorted when off. What may be more important is that with the wire off the sending...
  14. dennis112

    Oil Pressure Gauge swap

    Yes 12v applied directly to the gauge could damage it. Most electrical things will not survive when more than double the designed voltage is applied. We can't prove it one way or another without a replacement but we know that the resistance value taken earlier across its terminals indicates...
  15. dennis112

    Oil Pressure Gauge swap

    Yes, the VR power wire is required for a gauge to function properly. Splicing was needed if there was no other taps for it. The old oil light system used a full 12V for power and its old sending unit strictly as a ground. Direct 12V power is NOT compatible with the gauge. Tape up the old...
  16. dennis112

    Oil Pressure Gauge swap

    Glad to hear that you got it working. I doubt if I'll get to your area again (ex was from Pasadena) but who knows since the newer wife has 3 kiddo's with grandkids in the far upper west coast. Cheers! Dennis
  17. dennis112

    Oil Pressure Gauge swap

    Correct. With the engine not running there is no pressure and thus no reading on the gauge. Also the needle will NOT travel up to what would be considered the "low" pressure mark with just the key on. It is waiting on an actual signal from the sending unit. The signal out of the sending unit...
  18. dennis112

    Oil Pressure Gauge swap

    I measured the resistance of 3 original Ford oil pressure gauges and each was 13.0 (ohms plus or minus 0.1.) No wires were installed. Hopefully that will help. I also found that the temp gauges measured the same if you want another reference. When reinstalling the wires make sure the...
  19. dennis112

    Oil Pressure Gauge swap

    Its good that the temp and gas gauges work, which shows the VR is putting out voltage to the gauges. The illumination lights have no effect on the gauges and vice versa so they don't even need to be plugged in for testing. Just need to make sure the VR has its power wire connected (and the...
  20. dennis112

    install starter on a 65 fastback

    It may be the result of having the wrong starter for the installed manual flywheel. If its for a 157 tooth flywheel the internal offset of the starter's bendix gear is the same as an automatic and that starter is universal for both of those applications. If it has a 164 tooth flywheel, the...
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