Thread: TD5 accelerator problem

Hi Applemac

Have you checked the wiring harness plug to your ECU? TD5's have a well known defect of oil migrating up the injector harness fouling the plug to the ECU which in turn can cause problems with injection and other engine management parameters. Real bad cases of migration will find oil in the ECU.

Clean the plug and pins at the ECU with silicon spray or WD40, dry with compressed air and see if that fixes the problem. It won't be a permanent fix. Oil already in the harness will fill the plug soon enough. There are plenty of posts on the forum about the oil in harness problem. Some advocate sealing the injector harness under the rocket cover, some say the oil migrates up the twisted wires therefore a futile exercise.

If you find the cause of the problem, post it so the rest of us can learn from your experience.

cheers MLD

I think its the clutch switch.

Originally Posted by MLD

Hi Applemac
If you find the cause of the problem, post it so the rest of us can learn from your experience.

cheers MLD

I will certainly keep everyone posted on the outcome.

Originally Posted by goingbush

I think its the clutch switch.

Somehow I had a feeling about something to do with the clutch, it seems that when the clutch is fully depressed the revs come down.
I'll have to suggest it to the mechanic.

Originally Posted by MLD

Hi Applemac

Have you checked the wiring harness plug to your ECU? TD5's have a well known defect of oil migrating up the injector harness fouling the plug to the ECU which in turn can cause problems with injection and other engine management parameters. Real bad cases of migration will find oil in the ECU.

Clean the plug and pins at the ECU with silicon spray or WD40, dry with compressed air and see if that fixes the problem. It won't be a permanent fix. Oil already in the harness will fill the plug soon enough. There are plenty of posts on the forum about the oil in harness problem. Some advocate sealing the injector harness under the rocket cover, some say the oil migrates up the twisted wires therefore a futile exercise.

cheers MLD

The Harness is clean, no problem there.
I also checked the relays.

IMG_5916.jpg

Originally Posted by applemac

Somehow I had a feeling about something to do with the clutch, it seems that when the clutch is fully depressed the revs come down.
I'll have to suggest it to the mechanic.

Mechanic agrees that it could well be the Clutch Switch causing the problem, he suggested disconnecting it to see if the problem disappears.

To make sure I'm disconnecting the right thing, can anyone tell me if this is the right one ?

Yes that is the clutch switch,
Not sure but I think you have to turn it off in the ECU using a nanocom etc.

You can just try disconnecting it , if nothing happens put a link in there & short it out.

there is something else on it here.

Clutch switch and throttle response

I know this sounds strange, but check the fuse for the brake lights. It's a bit of a odd one, but with the TDCi if you blow the brake light fuse the symptoms you have described occur, (I'm not sure if the TD5 will do the same thing...).