Hot start smoking - Specific Circumstances

[Laird Scooby]

Originally Posted by StrongSpearWorks

So there’s nothing pin to ground, but pin to pin I get 1.63 ohms.
Also... any idea what these spare connectors should be attached to, or are they extras for air con perhaps?



I’ll work out image embedding one day, somehow 🤣
https://photos.app.goo.gl/iRCnerkeeHW2jzNy9

If the meter is on the 20k range, that will be 1.63k Ohms. If you're certain you've measured right this time, the sensor is FUBAR as at 1.63k pin-to-pin, that suggests it should have 800 Ohms (0.8k) pin-to-earth roughly on each.

I wonder if some bright spark has fitted the CTS and temp gauge sensors the wrong way round? Would be worth checking the sensor on the 'stat housing to see what that reads, just in case that's what they've done!





Off the top of my head i can't remember but fairly sure they're for the air con yes.

[StrongSpearWorks]

That’s interesting reading as I took a reading off what I thought is the temp sender for the cluster and that came as 0.800 when on the 20k setting.

I don’t have a sensor on the thermostat housing.
Looking at the intake side, there’s a sensor under manifold 2, with the knock sensor in sideways beneath it, then another under manifold 3.

I understand it that the cluster dial is under 2, the ezk (the sensor in question) under 3?

This could all be academic... since I flushed the coolant system this morning I’m getting a lot more white “smoke”. Could be that leaky HG after all 😨

[Laird Scooby]

Originally Posted by StrongSpearWorks

That’s interesting reading as I took a reading off what I thought is the temp sender for the cluster and that came as 0.800 when on the 20k setting.

I don’t have a sensor on the thermostat housing.
Looking at the intake side, there’s a sensor under manifold 2, with the knock sensor in sideways beneath it, then another under manifold 3.

I understand it that the cluster dial is under 2, the ezk (the sensor in question) under 3?

This could all be academic... since I flushed the coolant system this morning I’m getting a lot more white “smoke”. Could be that leaky HG after all 😨

Have you tested the EZK sensor?

[StrongSpearWorks]

Yes, ezk under 3 came back as 1.63, as per original post.

[Laird Scooby]

Originally Posted by StrongSpearWorks

Yes, ezk under 3 came back as 1.63, as per original post.

Good, i was wondering if whatever you were referring to hadn't made that clear - the reason there are two pins in the sensor is one serves the EZK and the other serves the fuel ECU - hence needing to check between pins and earth and pin-to-pin to check it.

If the gauge sensor isn't on the 'stat housing then it's usually near #1 or #2 inlet port.

[StrongSpearWorks]

New lambda, CTS and pressure cap for collant tank (it's weeping) ordered.

Situation unfolding.

[Laird Scooby]

Originally Posted by StrongSpearWorks

New lambda, CTS and pressure cap for collant tank (it's weeping) ordered.

Situation unfolding.

I thought you'd find the expansion tank cap was leaky, the lack of pressure in the system pointed at that.

The Lambda should help a lot of things as should the CTS - let me know how things go!

After changing any electronic components, pull fuse #1 to clear the fault code and fuel trims memories, give it a clean start again.

[StrongSpearWorks]

ECT changed. Wiring fault rectified; not sure what the issue was, but I re-crimped the new sensor ev1 connector and tested the continuity between the plug and the connector block at the near side suspension pillar - it’s pin 7 on connector C51, black and red wire, FYI. Continuity between C51 and EZK was good.

Clear of codes now. 111 reported on position 2&6 on the OBD.
Changed the plugs.
Changed the O2 sensor.

Pulled Fuse 1 for 30 seconds to clear any saved codes and ignition issues.

I’m guessing the plugs were quite old - idles nicer now.

Still smokes like a steam train. 🤦

[Laird Scooby]

Good news!

What did you set the plug gap to and what colour is the smoke out the back end?

[StrongSpearWorks]

Originally Posted by Laird Scooby

Good news!

What did you set the plug gap to and what colour is the smoke out the back end?

Gapped to 0.7mm.
Same colour smoke. White with a hint of blue.