Hunting

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Mooky

Mooky

Member
Posts
79
Location
Cornwall
Revving! Hunting! Surging!

It's been getting worse over last few months. I'm now taking slow corners at slow high speed!
It's usually worse on short journey. High revs at idle & under acceleration, it does dip & surge randomly.
Replaced filters & cleaned sensors. Any suggestions greatly appreciated.
 
Get a diagnostic done, make sure to write down the fault codes and fault text. That will narrow down the cause and focus your investigations.
 
Thanks Kev. I replaced with a decent harness earlier this year. Hunting was occurring before this but not as bad as now. Harness slightly I'll fit though cable tied at front to pull into situ.
 
I would be starting with the fuel system first, in tank sender and its plastic mesh filter would be my first target.
 
lynall said:
I would be starting with the fuel system first, in tank sender and its plastic mesh filter would be my first target.
Click to expand...
Thanks Lynall yes I thought that might be the case. I'd need to drop the tank right. Not keen on cutting access slot on a 110 I think that means going through a strut??!!
 
Mooky said:
Thanks Lynall yes I thought that might be the case. I'd need to drop the tank right. Not keen on cutting access slot on a 110 I think that means going through a strut??!!
Click to expand...
Sorry no idea on the 110 model.
I have had blocked tank strainer on my old td5 disco.
 
I discovered a few years ago that I could change the engine note on my TD5 by wobbling the fuel pump relay (one of the yellow ones in the compartment under the driver's seat). I replaced the relay and it was much steadier. It was probably making and breaking the supply to the fuel pump.

The other thing to bear in mind is that TD5 ECUs are getting very elderly now and are prone to failure. As they deteriorate they can give you all kinds of symptoms. As well as failure to start, they can give you symptoms similar to oil-in-loom such as rough running and intermittent cutting out. It's also possible for a duff TD5 ECU to check out OK on the Nanocom but be useless for starting the car. I've had all of this in my 12 years of TD5 ownership. So much so that I carry a spare ECU with me when I go out, pretty much like most people carry a screwdriver and a spare fan belt!
 
Thanks Brown.
Checked yellow fuse but all ok, a little oil around ECU but nothing like there was before I replaced the injector harness. Although I do wonder if the damage was done & the oil haf seeped into the ECU.
 
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