My S2 coupe bit of a rebuild and repair thread.

[Bowie69]

Re:Central locking, warm weather helps dry things out, and things start magically working again

Also, your tinkering, may have lodged things in the right place by accident

Fingers crossed it is long term

[B5NUT]

Have been told they just fail on the S2, and it makes the car somewhat undrivable, and the car drives very well. Have also been told the temp sender on the back of the head could be giving false readings.

[Jaswan]

MAF sensor?

[B5NUT]

The exhaust was custom made for the car some time around 2008 and the car has only done 2-3K miles since then. It could be these are just empty shells and it's yet another job the last owner did on the cheep.

These are the two cats off the car.
cats.jpg

[Tractor Dave]

Dead or dying cats

[B5NUT]

Well it passed with no advisories. However, the emissions where on the high side and the exhaust gasses do smell a little rich. So I've ordered a new Lambda sensor. I've recently had the injectors cleaned so is there anything else that would make the car run rich?

[newsh]

Our fingers are crossed for you :-)

[Jaswan]

Good luck for today!!

You will be fine

Jase

[B5NUT]

Thanks Dave. I just hope the exhaust fix has worked. Not heard any metal on metal sounds but you never know. I'm also worried about electrical issues, like the brake switch etc and spurious fixes like the central locking now working. Could there any other wires not making good contact! O well I will know in just over an hour.

[Tractor Dave]

Good luck with the mot. I'm sure it will pass with flying colours. I always get nervous despite having changed and refurbished absolutely everything. I don't know why.

[B5NUT]

Well it's the day of the MOT and something weird has already happened to the car. Unlocked the car this morning to check fluid levels etc and the the central locking pump over run problem is fixed! Pump now only runs for a few seconds before it shuts off. I have no idea why it's now working and I don't like fixing faults like that but will take it as a win.

Don't think the fault has been an air leak, it's more likely a bad connection, so either a bad wire in the bellows that is now making contact or the contacts on the actuators now making good connection. If the fault comes back then I'll clean up all the connections (should have done that in the first place) and check all the wiring out.

[B5NUT]

So using a meter on the middle pin and one of the side pins are active when the doors are unlocked and it stays active, and the opposite side pin becomes active when the doors are locked and again stays active. I've quickly looked a the loom going through the bellows on either side and it looks ok. I've also noticed It activates the pump to unlock as soon as the connector is plugged back into the activator (same for both sides). I've also swapped the activators out. So I can rule them out (I think).

I've had the boot apart again this afternoon and could not see any or hear any issues. I think the next port of call is the pump or a leak around the pump. They are usually well insulated so will have to take the rear trim out and have a good look around. Another option will be to pressurise the system and see if I can find a leak.

However on the plus side today I did find one more MOT issue, One of the bulbs in the number plate light had failed so replaced them both. I had completely forgotten about the number plate bulbs.

[newsh]

Pull the plug and just check the lock micro switches are working, middle pin common, other two pins momentary.
When you turn the key one way one contact will close.
When you turn the key the other way the other contact will close.
Let go of the key and both sides should be open circuit.
Check both doors.
You can test for a vacuum leak with a mightyvac.
It’s possible there’s a wire broken in the boot loom..

[B5NUT]

Well checked both actuators and they both appear to be working even swapped the out just in case and still have the same issue. Also checked the pipe around the door grommet and it looks OK no holes etc. Need to check the boot switch to see if that has an issue. Any other checks before I put the door cards back on?

Also found this old Motorola tracker fitted to the car, with a heavy little battery attached to it which was dead as it was only reading 0.6V . So it's all been removed and the harness fixed where they had tapped into it for power.
tracker.jpg battery.jpg

[Bowie69]

Sealed unit, plastic welded together.

They are cheap second hand on ebay, i buy the latest cabrio parts.