No cold start......

[rcb280z]

So I haven't had cold start in the mornings here and I should because it is usually below 60 degrees when I go to work. I noticed its been harder to start my Z for the past 2 weeks. I measured the TT this morning and I should have got a reading somewhere around 2.96, ambient temp is 59 degrees. I got no reading, 0.00. So off to find a TT. I wonder what killed it? Its only about 4 years old.

[Zed Head]

TT means thermotime? I think you might be blending the coolant sensor with the thermotime switch. Hate to ruin a good walk through the wrecking yard...

[rcb280z]

Oops, didn't have meter set on ohms. What I get for trying to do it without my eyes on . Anyway, I was getting a reading of 1,876 ohms and I believe it should be around 2900, maybe? But after a couple of seconds it would read a "1" on the meter. Guess I should adjust meter to next level and read it again.

[rcb280z]

Zed, yes ThermoTime switch.

[Zed Head]

Actually, it's just a switch. It's either open or closed to let juice flow through the CSV. And you don't measure across the terminals, you measure from each terminal to ground. One side is the internal heater, the other side is the ground for the CSV. 4 and 21 are at the ECU connection.

[rcb280z]

I guess I don't have a clue....can't get a reading of any kind from the thermotime switch now! What gives? What am I doing wrong?

[Zed Head]

See #5. In case you missed it...

[rcb280z]

Zed, I just noticed your post. We must have posted at the same time.

[rcb280z]

Zed, with the meter set at 200 ohms I measure 62.2 ohms. Which should be the same as the temp (62 degrees) in the garage correct?

[rcb280z]

BTW, thanks for being patient for I have next to no experience with electrical, like you couldn't already tell.

[rcb280z]

And that reading was one of the thermotime tabs to a ground, I should add.

[Zed Head]

Zed, with the meter set at 200 ohms I measure 62.2 ohms. Which should be the same as the temp (62 degrees) in the garage correct?

That's the heater side of the switch. You want to measure the other pin to ground to see if the switch is closed when it's cold, like it should be. You should see a closed circuit, very low to zero resistance, on the other pin, to ground, when cold. That lets power flow through the CSV to supply fuel when cold.