March 2003: Emerald ECU Part 2
Once the Sump had been refitted and tested it was time to sort out the rest of the system and ensure the car became useable once again.
There are several items that whilst not essential to the ECU's operation are nice to have so I have fitted them anyway!
Water Temperature Sensor
This is one item I would fit regardless of any other advice given. The ECU will detect an overheating engine and shut down the system until the temperature is safe again.
The sensor is supplied from a company called Fuel Parts UK and is a Bosch unit part no. 82033. A word of caution if you ring this company up to order anything ask for the number of their local dealer. If they have a nearby dealer the order needs to go there instead of directly to them.
Fitting
In order to fit one of these sensors you need a suitable adaptor to allow it to be fitted into a water pipe. Now when I rang the supplier I was told that the sensor used a screw thread of M10x1. Armed with this information I rang Burton Power and ordered an appropriate fitting from their catalogue. However the sensor would not fit as it has an M12x1.5 screw thread instead. Why do I trust suppliers?
The above meant that I spent a Saturday morning hunting for a suitable tap to allow me to redrill the hole in the adaptor to take the sensor. Once this had been done it was a simple job to cut and shut the water pipe round the fitting and refill the cooling system.
Finally I terminated the cables from the ECU wiring loom to the sensor plugs - hopefully I haven`t wired it the wrong way round as there weren't any clues on the module!
Air Temperature Sensor
This is probably not needed for a carb equiped car - but as it is driven in the winter will probably have some effect.
The sensor is again supplied from Fuel Parts UK and is another Bosch unit part no. 82045.
Fitting
In order to fit this sensor you need a suitable bracket to allow it to be mounted near the trumpets of the carbs - but not in the "wind chill" zone outside the bodywork. A simple piece of ally with a couple of holes drilled sorted the mounting out.
Finally I terminated the cables from the ECU wiring loom to the sensor plugs - hopefully I haven`t wired it the wrong way round as there weren't any clues on the module!
Shift Light
Well, Why not fit it as the ECU supplies a suitable control signal!
The shift lamp was ordered from Burton Power and came as a complete unit with a blue LED and a suitable resistor already fitted in the housing
Fitting
Fitting this is simplicity itself. First find a suitable 12V supply to power the lamp, next connect that and the ECU wires to the lamp housing and secure the housing in place.
With all of the above fitted it was now possible to take the car off the ramps where it has been sitting for the last month and out of the garage under it's own power.
Jobs still to finish off
Unfortunately there are still some jobs to be done to finish the car off completely.
Also I didn't realise that the air temperature sender would be so visible through the bonnet vent and the bit of scrap ally it bolts to could be of better quality!
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I also need to test the shift lamp and then mount it securely - at the moment it is loose on the dashboard in case there is a problem with the wiring,
The car has now been taken for a quick road test and seems to be behaving at low engine speeds - however above 3500rpm it is noticably pinking so a rolling road session and a remap to the ECU is in order.