Cyl head temp and air temp sensors, Are they where I think they are? Options

[4WheelDrifter]

This is where I think they are on a 2.0:

Cyl head temp sensor on #3 cyl behind it's intake runner.

Air temp sensor is between the throttle body and the oil filler, "pointing" to the throttle body with it's connection to the front of the car.

Am I right? Just want to make sure. I'm troubleshooting my engine's rich running condition and don't want make false checks.

Another question: I have a 2.0 with the 044 CPU and 037 MPS, What head temp sensor should I be using. The PO gave me a spare 012 sensor. The spare 012 reads 1.6k ohms (air temp about 70) but the one in the car reads 3k ohms with the engine cold (car sitting for 2 days, Garage slightly cooler than outside temp).

After reading Brad's site, it seems the spare 012 sensor is defective and the one in the car is good. Am I right on this?

Thanks!

[pbanders]

Your description of where the CHT is located is correct. What you think is the air temp sensor is actually the thermoswitch for the CSV. The air temp sensor screws into the top of the air distribution box (plennum).

The '73 2.0 setup has:
CHT: 0 280 130 017 (plus a 270 ohm ballast resistor in series)
MPS: 0 280 100 037
ECU: 0 280 000 037

The '74 2.0 setup has:
CHT: 0 280 130 012 (or a 0 280 130 003, same sensor with a longer lead)
MPS: 0 280 100 043
ECU: 0 280 000 043 (or a 044)

Your setup is mismatched. Hard to say which way is the best to go. The '73 setup was somewhat of a kludge, I generally recommend changing to the '74 setup. But that means for you, a new MPS. Pricey.

At 70 deg. F, the 012 CHT should read closer to 3K ohms. If it reads 1.6 K, it's too low and will be lean on startup and throughout warmup.

Brad Anders