can you test your TPS voltage with the ignition on, car off. You can put a multimeter on A and C I believe it is and or some combination of the 3 wires to get the readings of idle and WOT. the readings above idle in this case do not matter, but if the TPS voltage at idle is above 0.55v, that could cause the issue with the code 13 you are receiving.

If you dont have a scantool you can use an aligator clip or whatever to check the voltage of the O2 sensor lead. It should be a single wire O2 as my VIN C FSM shows.

An important question is HOW MUCH variance does your temp gauge on the dash show? It would be helpful to verify the actual engine temperature sensor reading. I'm not sure of the resistance levels on the ECT but I can probably look it up for ya when I have a book handy.

I disagree with wren, I'd like to see if the O2 is good or not before pointing fingers at running too rich by being cooler. If the new O2 is bad, let start to look at what is causing it. the ECT may be an unrelated issue.

Power off, disconnect your sensors. Read from the connector pin to ground. Looking for a resistance value here. On the ECT sensor. pin to ground (manifold). The IAT isn't self-grounding (plastic body) so pin to pin on that one. Report the values back here.

Cold or hot motor, does it matter? Also, you said read from the connector pin to the ground, measure it in ohms? Whats an IAT? Ill try checking the TPS too.





Ok, the second line from the left, I believe that is around the 150ish line? When hot and driving, the needle will go just fully past this line, maybe 2-needle lengths (width wise) past the line, then drop back down to the line, or 1 needle length below the line.

And with the car off, power on, to test the TPS, I test it with the gas pedal not touched (idle), and then again all the way to the floor (WOT)?

Now you both said 2 different things, Hans, I have to test the TPS with the acessory power on? Willwren, you said turn the power off for the 2 other sensors, why is one with the power on and the other with the power off?

It does not sound like its moving very much, about how many degree different would you say just by guessing?

You dont need to be near the gas pedal, just pop the hood, jab the wires with the leads and move the TB back and forth, make sure the ignition is on, but the car is not started.

That is how you test the TPS.

As far as the IAT, that tests the Idle air, I'm not sure how this would be related to the temperature gauge in the dash. I dont see how its related.

For the engine temperature sensor (NOT the IAT), follow willwren'* advice.

Can you test the TPS baseline voltage at idle and simulated WOT? also please test the O2 sensor in the steps described above or in the first picture I posted....

Because you're testing the resistance of the Coolant Sensor, and the voltage output of the TPS.