Advice for newbie please

Debs td5 · May 2, 2021

Guys I need some help, I own a discovery 2 td5 auto, im having some problems with it, please don't tell me to get rid, I'm totally in love with it, so this is the problem......starts up, drives mint, pulls great then boom, m&s lights come on the engine dies go to start it again, turned to pre ignition water temp gauge goes to hot with light on, won't start, all though it's not over heated turn it on an off 20 times same thing, then try again temp normal starts up straight away, we have replaced already the crank sensor, fuel pump anyone got any ideas please cheers

ROY SIMPSON · May 3, 2021

Sounds more like an electrical fault than a mechanical one.

J_D · May 3, 2021

ROY SIMPSON said:
Sounds more like an electrical fault than a mechanical one.

It does, poss a bad earth.
Where they are I don't know.
Could try posting in the Discovery section for more information

kurtjohnson10 · May 3, 2021

I would try looking at your wiring see if any bare wires are touching each other or any loose wires under bonnet. Check round the fuses, relays as well.

Cjones200307 · May 5, 2021

Hi debs I'm new on here too, my d2 does similar things, the old fella I got her off told me the m+s lights coming on were something to do with the immobiliser, and he had a new wiring loom fitted behind the dash, I've had her 12 months an shes only started to m+s me in bad weather, looked deeper into it and turn out she likes to let water in arround the windscreen and sunroof so I'm on with making her water tight, if I was you just for piece of mind check yours out for water ingress and give your immobiliser coil behind the steering column a clean. Best of luck

JUKE179r · May 6, 2021

Welcome to the forum @Debs td5 .
Check your battery voltage is @ 12.7 VDC and verify your battery connections are tight and not corroded.

janderson41 · May 7, 2021

I,m with juke. Battery power is absolutely necessary to keep the m and s lights at bay.

ROY SIMPSON · May 7, 2021

It may be worth checking the red plug and the engine ecu for signs of oil ingress from the injector harness (see YouTube for tutorial) as this has been reported to cause the engine to run rough and cut out and flashing m&s lights and the signal from the engine coolant sensor also passes through so could also be corrupted.

Advice for newbie please

Debs td5

New Member

ROY SIMPSON

Active Member

J_D

Well-Known Member

kurtjohnson10

Well-Known Member

Cjones200307

New Member

JUKE179r

Well-Known Member

janderson41

Active Member

ROY SIMPSON

Active Member

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