Scandi

Td5 misfire

5 posts in this topic

My 2004 Td5 has started to misfire (actually no firing at all) on one cylinder but only when engine is warmed up after 5-10 minutes or so. When cold it runs smooth.

I have checked the injector harness for oil leaks but can with confidence say there is no evidence of leaks even at the top. Bone dry.

Checking the temperature of the exhaust manifold it is clear it is cylinder 1 that is playing up as it is a lot cooler there.

Any leads on this anyone?

Lars

Share this post


Link to post
Share on other sites

Have you been able to connect it to a Hawkeye or nanocom? Any error codes?

 

Possibly grounding issue?

 

When you say no oil leaks... you are talking about the ECU red plug, under the offside seat? That should be clear.

 

How old is the injector harness?

Share this post


Link to post
Share on other sites

Hi Jabber, and thanks for the input.

I haven't connected it to look for fault codes yet, but will do so when I can find someone with the right equipment.

There is no oil at the "red plug" nor is there any at the top of the harness where it connects to the cylinder head at the front of the engine.

I bought the vehicle a couple of years ago and don't have any records of any replaced harness, but having no traces of oil is at least a good sign.

My plan is to open up the top cover and check for any chaffing of the wiring or any other suspicious stuff.

Lars

 

Share this post


Link to post
Share on other sites

I had the same misfire with our 2004 TD5 Defender.

One cylinder clearly not firing.

There was no oil at the ECU red plug but l changed the injector harness anyway, and it cured the misfire.

That was about five months ago and the fault has not recurred. Worth a try, the injector harness is under £30 and is easy to change.

And if it does not cure the fault, at least you will know what it isn't.

Edited by Lightning

Share this post


Link to post
Share on other sites

Thanks Lightning for that info.

I will replace the harness as you say since it's an easy and quick job. At the same time I can check the injector seals and replace the top gasket since it's leaking a bit.

Lars

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now