Thread: Spark Issue, 02 LR Disco V8

Have you actually checked for spark at the plugs?

Just asking because everything else points to a dying fuel pump (it can pump when dying, just with a lower pressure than what's needed).

Originally Posted by Scouse

Have you actually checked for spark at the plugs?

Just asking because everything else points to a dying fuel pump (it can pump when dying, just with a lower pressure than what's needed).

I took a plug out to see spark when i crank if there was any spark, but may have not been doing it right and the fact it wouldnt start, I was cracking the bad .
When I pulled the plug out I could smell fuel but guess that don't mean anything.

I just hope that driving it like that hasnt stuffed something up big elsewhere.
I've given up on it, I get home from work and its dark so makes it hard to tinker with. So im leaving it to the Pro's, see what they say.

Those leads are simply seriously cactus. A new set plus probably change the plugs will see a great improvement. Get them to test it with a new MAF as well for a comparison. It doesn't (by appearances at least) seem to have a great service history so these are some basics that go wrong. Plugs that are supposed to last 100,000k's, so leads get left as well. Have a look at the air filter as well, might be a surprise waiting.

spark? yes? if no, crank engine and check tacho,, needle moves? yes=crank angle sensor working no = usually the sensor gives a bit of warning,, just like the symptoms you've mentioned good job replacing those leads

New Plugs were put in Nov 2012, the Leads were new when serviced mid yr june/July, Its always servied by the Dealer when its due, so its never been neglected.
Im not worrying about it as AMV have it to look at on Tuesday, I'll let you guys know what the problem is, though I have apretty good idea of it given what it is and isnt doing.

Much thanks for the advice as well,

How did you go changing the leads? I had to replace just 1 a few months ago but could not get access to the coil pack without removing the inlet manifold. Real pain.

Looking at your leads I would be looking for other faults, I don't believe that is normal degradation. They have been very hot at some stage, so fuel pump would be first guess.

OK... The Issue was the Fuse Box under the Dash was rooted. Apparently AMV havnt seen a fault or issue like this b4. But its been Fixed and tested So im very happy with that, New Fuse Box and a quick look over and it was all good.

Mine too mate, fuse box, last thing to look at as rare and hard to diognose, painful hey