L

LetsHopeItFits

Active Member
Help/advice needed.
3.9 V8i manual discovery 1996.
Before Xmas it decided not to start. It turns over, very nearly fires, but doesnt. Im at uni so have basically no tools at all.
EZ-start makes no difference, so its a spark issue. I bought a sparkplug to test it, and it sparks once when I first try (first lap of the dizzy) then never again.
My guess was ignition coil, so I ran down to the parts place and got one. Fitted it with no tools and it still doesnt work.
So it went to a local garage on a flatbed, who after 6 weeks called me and told me theyve given up. Ive got a bill of over £200 and a 2ton paperweight thats just had 700 quids worth of BFGs put on it.
I brought a few tools from home back to uni with me after xmas, including a multimeter. Ive got a mate with a shogun whos going to drag it back to the campus carpark for me, and from there Im going to try to fix it. Ill get a list of everything from the garage that theyve checked/tested/done, and if any of you have any ideas, that would be fantastic.
Thanks!
 
What did the garage do for £200? Do you have a list of what was checked?
Things like ignition amplifier module or crank sensor ( I think the 96 has one, but not the 95......maybe). Also new coils can be bad.
 
They started by changing all 8 sparkplugs. Then they said the distributor was broken, and they said they couldnt find another, so I sourced one from a local breaker (cost me £80). Then they said the ECU got wet (wasnt leaking before) and it was blowing relays, so they dried it out.
Then they said that the wiring didnt match the diagrams and that its obvious someone else has messed about with it.
They also said they checked the earth strap (which Ill double check with a jumplead)
 
The ignition amp is a known weak point. It doesn't like too much heat and a bad one can cause these issues. It's attached to the dizzy. It can can be replaced with a better situated replacement away from the heat of the engine.

Are all the funky relays now working or do you know?
 
Ill have a look at the ignition amp. Ive not seen the relays or the wiring myself, but Ill probably head down on wednesday to pay the bill and push it out of their compound, so it can be dragged on the weekend.
Is an ignition amp expensive?
 
LetsHopeItFits said:
Ill have a look at the ignition amp. Ive not seen the relays or the wiring myself, but Ill probably head down on wednesday to pay the bill and push it out of their compound, so it can be dragged on the weekend.
Is an ignition amp expensive?
Click to expand...

Expensive, well my quick search its £25, Part number STC1184G for the Lucas item. My 10 year old just in case amp cost me £14.
From 1996MY Land Rover repositioned the 3.9s Ignition amp, the amp is attached with the coil on the slam panel behind the near side head lamp and so no issues from heat there.
I assume u have a UK spec vehicle therefore it has a ‘spider’ immobiliser asb the symptoms u described are similar to a failing immobiliser circuit.
So check the vehicle when unlocked and remobilised that u have 12v at the coil on position two of the starter switch.
If not try a single wire link from the battery + to the coil + … if it is a spider issue the engine should the fire up straight away.
Albeit thats if the vehicle is still as it left the factory and unmolested :( Don't worry about crank sensor your 3.9 doesn’t have on
 
Sounds like the garage doesn't have a clue, in my opinion.. a bit of logic goes a long way, these engines aren't that hard, with not a huge amount of electronics in the way
Hopefully the garage hasn't changed anything too significantly
 
kermit_rr said:
Sounds like the garage doesn't have a clue, in my opinion.. a bit of logic goes a long way, these engines aren't that hard, with not a huge amount of electronics in the way
Hopefully the garage hasn't changed anything too significantly
Click to expand...
Agree completely. Started by changing plugs, really? All 8 of them have failed and it wont start?
Im in 2 minds about paying them. On one hand theyve spent many hours on it and changed a few things, on the other hand, customers pay garages for the service of fixing cars, which they havnt done.
It depends how helpful they are with crossing things off the list. Ill ask for a full list of everything theyve tested. If theyre dicky about it, Ill pay them to release my car and then go through small claims
 
LetsHopeItFits said:
Agree completely. Started by changing plugs, really? All 8 of them have failed and it wont start?
Im in 2 minds about paying them. On one hand theyve spent many hours on it and changed a few things, on the other hand, customers pay garages for the service of fixing cars, which they havnt done.
It depends how helpful they are with crossing things off the list. Ill ask for a full list of everything theyve tested. If theyre dicky about it, Ill pay them to release my car and then go through small claims
Click to expand...
Garages sometimes won't admit they're stumped and don't know :( hopefully you can find a reasonable compromise
 
kermit_rr said:
First thing you need to do is charge the battery. It's been sat at the garage while they've done who knows what, it could be in any state
Click to expand...
Good point - maybe take a fully charged battery to the garage and swap it over before doing any checks.
 
Well Im going today to pay the bill and push it out of their yard so I can get it on the weekend.
Thankfully theyve decided not to charge me any labour, so just for the sparkplugs, which is kind of them.
So, has anyone got any useful links to what all the wires should be doing?
Ill start by testing the battery voltage and the earth, and then all the wires which connect to the coil. How do I test the ignition amp? Thanks
 
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