Question about 1994 Land Rover Discovery

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1994 Land Rover Discovery is not running on all 8 cylinders.

We have replaced the leads, plugs & distributor caps. What else could the problem be.

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Ok first of all did you put champion spark plugs in, that is what is recommend for the truck. I work at a land rover dealership and a few times doing a tune up, pulling the new spark plugs out of the box, the spark plug gap is smashed, soo make sure the spark plug gap is corrected. Another obvious is to make sure you have the spark plug wires to the proper spot on the distributor. If you havent replaced them a little trick to see if they are good is to get some water in a spray bottle and spray the wires down. If they are bad you will see the spark arcing from one wire to another.

Now i assume your getting a flashing check engine light since thats the only way you can know for sure that you have a misfire. Very rarely have i seen fuel problems with these Rover's but the easiest way to check is to buy a fuel pressure gauge and check for pressure. There is a fitting right on the fuel rail where you can check fuel pressure.

Ummmm ok without knowing any codes another common this that this Rovers do is blow head gaskets. If a head gasket is blow, then coolant leak into the combustion chamber causing a misfire. Depending on the situation you are either going to need new head gaskets or a new motor.

If you can pull any codes that would be helpful at least now you have some place to start.

Posted on May 10, 2009

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There are 3 things needed for combustion fuel, compression, and spark. if you are missing any one of these you will have a misfire. you can check spark easily by pulling off a wire and making sure it arcs (make sure you are not touching the vehicle while touching the wire or you will get shocked, not enough to kill you, but is painful). to check fuel you can use propane and SLOWLY!!!! open to the intake and if the injector is stopped up it will smooth out (because it will start running on the propane instead of the gas in the car). if you open the propane too quickly the car will stall. the propane almost always works, but i have had a couple of times it didn't. to check compression you would need a compression gauge, compare readings from cylinders, if one is considerably lower than the others you have a valve train or more serious issue.

Posted on May 10, 2009

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SOURCE: My Land Rover Discovery isn't running on all 8 cylinders.

check your fuel pressure. check injectors and check for gasket leakage.

Posted on May 10, 2009

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1 Answer

How to replace a distributor

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Im looking for an on-line firing order diagram for a 1997 land rover disco with a 4.0 v-8

Telephone: Fax: VAT Registration No.:
Notes Specified value Measured value
Ignition system
Ignition coil Make Bosch
Ignition coil Type 0 221 122 392
Ignition coil supply voltage + with ballast V 11,0
Primary resistance Ohm 0,67-0,82
Firing order 1-8-4-3-6-5-7-2
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Distributor (ECM) No. 42583A
Contact breaker gap/trigger air gap mm 0,20-0,35
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Manufacturer: Land Rover Model: Discovery (90-98) 3,9 Engine code: Output: 134 (182) 4750 Tuned for: R-Cat Year: 1994-98
© Autodata Limited 2007 14/05/2011 V6.410-

8 7
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2 1
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Can any1 tell me why my v8 3.5 landrover discovery wont start it started the other at the first turn of the key and sounded bang on 1 hour later i went to move it and again it started at the first turn of...

i need to brush up on landrovers

what year is yours
SU carbys or EFI system

spark plugs means fuel ....not a diesel
leads and coil and electronic distributor fitted

a bang when started ? that a backfire through the air filter ?
timing out or fuel issue

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the 02 sensors may need replacing
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Apr 29, 2017 | 1994 Land Rover Discovery

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I want to change the leads on the spark plugs. i

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Nov 16, 2009 | 1994 Land Rover Discovery

1 Answer

Part number for a discovery 2 td5 clutch master cylinder

Land Rover Discovery Series 2 TD Clutch Master Cylinder
Free, Land Rover Workshop Manual CD with this item


Land Rover Part Number: STC000280

Another reference: HERE

I hope help you with this.

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Jul 27, 2009 | 1994 Land Rover Discovery

1 Answer

My Land Rover Discovery isn't running on all 8 cylinders.

check your fuel pressure. check injectors and check for gasket leakage.

May 10, 2009 | 1995 Land Rover Discovery

1 Answer

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1995 Land Rover Discovery 3.9L V8 Not Starting

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