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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Posted on Jan 02, 2017

MNfisherman
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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


disconnect the cable from the negative battry terminal. position the engine with number one cylinder at TDC on the compression stroke this mean you can take number one spark plug out with the engine cool place your thumb over the spark hole and have some one turn the engine over and and feel the presure by your thumb when you feel pressure stop turning engine take the distributor cap and make sure the rotor is pointing to number one spark wire in distributor cap if not you may have to turn the engine a little with your hand apply a paint mark on the edge of the distributor body directly below the rotor tip. also make a mark on the distributor base to the engine to ensure the distributor can be re-installed in exactly the same position as originally installed disconnected the coil wires from the distributor cap electrical connector, spark plug wires from the spark plugs remove the distributor hold-down bolt and pull out the distributor.

Jun 04, 2014 | 1995 Land Rover Discovery

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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
Distributor (ECM) Make Lucas
Distributor (ECM) No. 42583A
Contact breaker gap/trigger air gap mm 0,20-0,35
Cylinder layout

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
6 5
4 3
2 1
looking from front of disco

May 14, 2011 | 1997 Land Rover Discovery

1 Answer

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

you say running rich running rough
the 02 sensors may need replacing
clean maf and air filter
timing chain or belt slipped ?

starting if a separate problem
starter relay or starter and solenoid to be checked out


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Apr 29, 2017 | 1994 Land Rover Discovery

1 Answer

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


The part that you unscrewed from the spark plug is what allows the plug cap to snap onto the plug. Screw the little adaptor back onto the spark plug - and the plug cap should then snap into place with a little pressure.

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

2b21f35.jpg

Land Rover Part Number: STC000280

Another reference: HERE

I hope help you with this.

Sep 01, 2009 | 1999 Land Rover Discovery

1 Answer

I have a 1994 Land rover discovery the brakes aren't working and I can't find a leak in the brake line what could be the problem the pads are new


Probabley its the brake master cylinder, try to bleed the system and check it out if theres good pressure released thro the nipples.

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

Firing sequence/numbering on distributor cap of Landrover Discovery 1, 3.9lit V8, 1998 model


Firing order is 1-8-4-3-6-5-7-2 Cylinder numbers looking at engine from front Left Bank 1-3-5-7 Right bank 2-4-6-8 Distributor has clockwide rotation,

Apr 26, 2009 | 1998 Land Rover Discovery

1 Answer

1995 Land Rover Discovery 3.9L V8 Not Starting


Check the distributor position when the engine is turned to TDC , the rotor should be facing close to no. 1 spark plug lead.Try spray some quick start spray in the inlet and see if it takes , if so then your fuel return is dumping too much fuel.The older pressure regulators were adjustable by a small screw next to the diaphragm.

Dec 12, 2008 | 1995 Land Rover Discovery

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