5ktq ISV temp sender

[Peter McConnel]

> 
>> idle/wot resoldered ,repositioned and tested ad-nauseum, idle adjustment
>> screw brought in a bit. now idles at ~750. am in the process of
>> testing the
>> ISV, but need to replace the coil first i think. the secondary
>> ignition test
>> failed: infinity ohm between 1 and 15...
> 
> In consulting the bentley, the secondary test is for the resistance between
> 1 and 4 (with 4 being the connector for the coil wire) which is spec'd at
> 5-9k.  Also note that you should check the ground connection of the coil at
> the firewall.. strange things can occur if you have a bad ground here.  This
> is (one) of the reasons why I couldn't get my 4ktq running at first.
> 
> For the PRIMARY test (between pins 1 and 15) the spec is .5-1.5 .  Bentley
> says if it fails spec to replace the coil so aparently the ground is
> irrelevant to the resistance spec between 1 and 15 but IS relevant for 1-4.
> So it sounds like your suspision is correct.
> 
> 
> HTH
> 
> -Marc-
OOPS! i wasn't looking at the book and got the tests mixed up. the 1 - 15 is
ok. i retried the 1 - 4 with the info you had and got 7.6k ok. so the coil
is ok at least as far as the ISV is concerned. where is the ground? is it a
wire or is the body the ground? so many questions! thanks for your help

Peter