2002 Defender TD5 Injector Overfueling?

Hello Land Rover Zone,

My first time posting but have found the forum very useful since owning my Defender. Just driven back to the house today, get stopped at a level crossing about 2mins from home and turned off as it was going to be a wait.

When I restarted noticed a lack of power and not the normal TD5 engine (song) noise, parked up at home and plugged the nanocom in to have a look.

Found the following faults:

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The TD5 ecu contain the following faults:

FAULT 27-02 injector 2 peack charge long (CURRENT)
FAULT 31-02 injector 2 open circuit (CURRENT)
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Turned off, had a cup of tea and dug out my laptop to connect up to the nanocom. Started up and had a look at the injector balance:

It starts with all 5 in normal (if there is such a thing!) between -3 and +4, (hunting idle?) after about a min injector 2 jumps to reading between +10 and +14. The others showing minus figures trying to compensate. See Attachment.

After switching off, I had a look at the ECU plug and cleaned a very small about of oil out and restarted with no difference.

At the back end of December 2010 (@95,000) I had some problems with the Land Rover cutting out after about 10mins. We sorted that with a New Injector Harness, cleaning out the oil in the ECU plug, new MAF Sensor and replacing the Injector Seals and Washers.

Only done 20,000 miles since that happened and haven't had any engine related issues since.

Currently only ongoing faults ABS/TC lights on and following error from nanocom

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FAULT 27-05 shuttle valve switch electrical failure
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Going to have a better look under the bonnet tomorrow.

Surely not time for a new injector harness?
Looks to be single injector problem?
Electrical/wiring?

Any ideas or thoughts (relating to this problem or not!) greatly appreciated

Mark

A replacement harness won't break the bank and has to be worth trying, whose harness - OEM or buy cheap buy twice. While doing the harness you can verify that injector 2 is still properly adjusted although the amount it delivers is electronically determined but you might as well while you're in there.

MAF sensor on TD5 controls only EGR whatever others tell you - have had this confirmed by two Land Rover techs now. The important parts are the temperature and pressure sensors - apparently.

See here for your shuttle valve issue >> Shuttle Valve fix - and others

PS : Don't use an open ended spanner on any brake unions - go buy a proper brake hex spanner.

Thanks for the info ordered a new harness, arrived this morning. Replaced and it's running again like before.

Building myself up to the shuttle valve issue! That's a very good guide. Yes, got brake hex spanner for a job replacing my brake calipers. Right tools for the right job....

Running again like before as in sorted and running OK or still like a bag of nails. If you do tackle the shuttle valve the info in that guide will mean the three amigos if they come back will be a genuine fault - not a broken wire or dodgy connection - at least on the ABS pump anyhow

Often ABS/TC faults can be cleared by simply unplugging connectors and replugging them. The contacts in the connectors get corroded and give intermittent faults. Check the wheel sensors as well as the obvious Wabco connectors. Clean up the connectors and use a smear of Vaseline or similar when reconnecting to stop any further corrosion. Cost nothing and may solve your problem. has worked for me on my wife's Volvo and a 4.0l Jeep Chrokee I once owned.

Sorry, my bad choice of Words! It's back and running ok.

Cool, that gives me a few things to have a look over first. Seen that Vaseline trick mentioned before.