no go disco

[Mudsloth]

Allrighty then, any ideas appreciated.

I have a 1998 3.9 v8 Discovery. I have spark, I have fuel I have air. Compression is fine. The old girl won't start. Drove it one day no probs, wouldn't start the next morning. The central locking and alarm system stopped working a week previously but the vehicle still drove fine. Distributer cap and rotor button are a couple of weeks old. I have swapped the central locking/alarm module and this made no difference.

[alien]

Have you been near any water or mud of late?
(Silly question, I know the answer).

When Chops's got water in the dizzy it took alot of drying.
Have you looked in the electronics of the dizzy?
His had spark but wouldn't fire till we cleaned the cap 7-8 times.Lot of CRC and a rag.

Cheers.

[Mudsloth]

Have you been near any water or mud of late?
(Silly question, I know the answer).

When Chops's got water in the dizzy it took alot of drying.
Have you looked in the electronics of the dizzy?
His had spark but wouldn't fire till we cleaned the cap 7-8 times.Lot of CRC and a rag.

Cheers.

Me go near mud?! I'm aghast!


I took it apart and cleaned it, the thing it was running fine a good week after its last dunking.

[**Discovery300Tdi**]

if ya had prob's with the alarm/central locking maybe your immobilizer is playing up. sounds like it if everything else seems fine.

[Mudsloth]

if ya had prob's with the alarm/central locking maybe your immobilizer is playing up. sounds like it if everything else seems fine.

I reckon you're right simmo. I've got a spare one. I'll re program tmrw. Then go out and break it again......

[V8Landy]

Isn't there some sort of switch on the fire wall that can cause the fuel to stop pumping or similar.:confused:

[dullbird]

the actual immobiliser may need to be bypassed if that is the case a new fob isn't going to fix your prob's, thats if that is whats playing up....when you turn the key do you get all the lights up on the dash and then nothing?

the other thing is it might be your starter...did you drown that as well? you checked all your connectors etc perhaps they have crud in them

[PhilipA]

Was the new dizzy cap and rotor branded "Lucas"?
If cheapo fakes this can cause no go, particularly the rotor.
Try the old ones.
Regards Philip A

[Mudsloth]

oK, its not the immobilizer, the vehicle was running fine for about two weeks with the current rotor button and dizzy cap. I drove the car home after picking the rug rats up from school, it sat for about 3 days then would not not start. I think it has to be electrical. I have spark, I have fuel. I have a spare ecu so I will try that, if that doesn't work I guess it's time to go digging for the spider thingy. It's ironic you know, the cab filled with water to the steering column about a year ago and the electrics recovered without a problem. I'm thinking getting an older one with less elctrics. Does anyone know if the 94 models have less computers?

[mike 90 RR]

Was the new dizzy cap and rotor branded "Lucas"?
If cheapo fakes, this can .... (WILL) >>> cause no go, particularly the rotor.
Try the old ones.
Regards Philip A

Ditto x2

[mike 90 RR]

I have spark,

Yep ... But still, reinstall the old rotor

[PhilipA]

Fresh or salt?

Even if fresh over time all of the electrical connections will corrode.

I have a friend who is an insurance adjuster who will write off any modern car with water damage over the dash.

So your problem could be anywhere in the wiring loom.

Regards Philip A

[Mudsloth]

Fresh or salt?

Even if fresh over time all of the electrical connections will corrode.

I have a friend who is an insurance adjuster who will write off any modern car with water damage over the dash.

So your problem could be anywhere in the wiring loom.

Regards Philip A


Yeah i know......I just tested the compression and its down to 60 in all eight cylinders. Back to the mechanic where the engine was fitted, its only 12 months old. Thanks for the ideas guys.

[PLR]

Yeah i know......I just tested the compression and its down to 60 in all eight cylinders. Back to the mechanic where the engine was fitted, its only 12 months old. Thanks for the ideas guys.

G`day

Check your gauge on another vehicle ?

Squirt some oil in each hole and spin it over then check the compression again .

It will likely come up alot and may even start .

For whatever reason it wouldn`t start it is most probable the low compression will be from fuel washing the bores in your attempts to start it .

It is unlikley that you will get such even low compressions from both banks and all cylinders from a mechanical fault as long as it is getting enough air .
eg . check the aircleaner/intake for blockages , a rags left behind a small animal ?

Cheers

[Mudsloth]

Tried the thing with the oil and the compression dropped to 29. I ended up hooking it to the crumble door and tow started it. All is now fine she starts and runs in her old grumbly way again. Thanks for the posts everyone. I think it may be leaking fuel into the cylinders and washing all the oil away and killing the compression.