My misfire " A warning to you all"
Discussion
As per my other thread I had a misfire on No3 cylinder due to the injector not delivering fuel.
After many hours head scratching and testing I worked out that there was no power to the injector and that the injectors must share a common feed. I suspected it has to be where 1 wire becomes 6.
I removed the 2 plugs which enter the bulkhaed under the air box and I could feel about 8inches down there was a connector inside the loom so I sliced the loom open this is what I found.
It was all green inside which is what happens when copper wires meet water. It looks like water can enter the loom at the top and where it branches off for the smaller plug. When I removed the small heatshrink covering the connector the feed for inj 3 was clearly broken off from the rest.
Now to me this is a brakedown waiting to happen on all Speed Six powered cars. I have cut out the crimped connector and replaced it with a soldered joint.
I have also filled the loom where water can get in with silicone sealent to prevent future water imgress.
I would get yours checked and sealed as this can happen anytime.
After many hours head scratching and testing I worked out that there was no power to the injector and that the injectors must share a common feed. I suspected it has to be where 1 wire becomes 6.
I removed the 2 plugs which enter the bulkhaed under the air box and I could feel about 8inches down there was a connector inside the loom so I sliced the loom open this is what I found.
It was all green inside which is what happens when copper wires meet water. It looks like water can enter the loom at the top and where it branches off for the smaller plug. When I removed the small heatshrink covering the connector the feed for inj 3 was clearly broken off from the rest.
Now to me this is a brakedown waiting to happen on all Speed Six powered cars. I have cut out the crimped connector and replaced it with a soldered joint.
I have also filled the loom where water can get in with silicone sealent to prevent future water imgress.
I would get yours checked and sealed as this can happen anytime.
Edited by Barry Ashcroft on Saturday 29th May 17:09
Well it sounds like there is not much left to change apart from the coil pack.
Where did you have it serviced?
It might be worth tomorrow removing all the plugs from the injectors completley and checking with your meter that you have a stable 12volts to them all with the ignition on.
They bank fire 1,2,3 & ,4,5,6
There is 2 earth pulses from the ecu 1 to each bank of 3.
The wires are split under the dash to 6 seperate wires going to the injectors so pull the rubber caps of the injectors to get to the wires and view the colours and check you have continuity to the plug in the bulkhead.
You can then check the same from the bulkead plug back to the ecu but I don't know the colours when the enter the ecu.
From looking at the crap type of crimp connector it is quite possible that you could have a beake down on one of the crimps.
Good luck
Where did you have it serviced?
It might be worth tomorrow removing all the plugs from the injectors completley and checking with your meter that you have a stable 12volts to them all with the ignition on.
They bank fire 1,2,3 & ,4,5,6
There is 2 earth pulses from the ecu 1 to each bank of 3.
The wires are split under the dash to 6 seperate wires going to the injectors so pull the rubber caps of the injectors to get to the wires and view the colours and check you have continuity to the plug in the bulkhead.
You can then check the same from the bulkead plug back to the ecu but I don't know the colours when the enter the ecu.
From looking at the crap type of crimp connector it is quite possible that you could have a beake down on one of the crimps.
Good luck
Another thing you can also do is when the engine is runnng and missing get under the bonnet keep the revs high so the engine does not stop and remove the plug from each injector in turn and work out which clyinder is missing you can tell easy as the engine note will change.
That will tell you valuble info if it happens to be a whole bank of 3 missing
That will tell you valuble info if it happens to be a whole bank of 3 missing
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