Ok I have a 1998 disco 50 year anniversary addition has 113k. I have done everything to this thing almost it seems redid the brake system head gaskets fuel pump entire exhaust system,wires,plugs,power steering gearbox,O2 sensors,air and idle sensors and a ton of other stuff. I have always had a idle issue up to the time I redid my head gaskets and changing out a few things.It use to idle high had to manually adjust it down but fixed it. Well after changing the water pump on it a few months after it just didn't start it will try to turn over every now and then missfired but wouldn't run.We checked with a spark checker on my wires all are sparking has plenty of fuel pressure. I just put in a timing chain had my brother help me with it just to make sure I didn't fug stuff up just for a second pair of eyes and hands.Well figured it would fix the problem ran into this before just not with a disco say on my wife's car and a few friends and such it usually was out of time. Well put my timing points 6 and 12 oclock position on the gears top being 6 and bottom 12 and I did check to make sure the piston was up on plug one. I got the position info in a workshop manual on disco's I pulled from a link a guy put up from here.The gears had wear and tare like groves into the bottom gear teeth the chain was loss and the bottom gear you could slide back forth on the shaft was fine after I stuck the new chain on with gears.It does not give me a check engine light or I would try to scan the problem with my mid line scan tool.It just don't start it don't really even try to start only every now and then and you get happy it seems like it might fire but nothing.It's getting spark from the wires I'm going to change the plugs just to make sure it's not them but they don't seem that bad off to not even remotely get close to starting.If you could shoot me some things that might help or get me in the right direction on fixing this please send them I'm not trying to take this to a shop and sorry for the book I wrote.If you need more info on it to help you just ask I'll give what I can.

 

OK that's a giant run on sentence that was a little hard to read here is what I get

You had hi idle you manually adjusted down, wrong thing to do

You did a water pump now it won't run

You tried a timing set no change

You have fuel pressure and spark

So this means the injectors are not firing

How is cam sensor and crank sensor wiring? Cam sensor near water pump, crank on drivers side of block near transmission think starter but opposite side

Key on what's the TPS reading? This may be important

Are the spark plugs wet? Smell gas?

And don't expect a code, rover couldn't make it easy like that

 

Well went through some of the stuff you commented on.I checked to see if the fuel injectors are doing there job and it's getting fuel.I changed out the wires and plugs put my spark checker on the wire.I left the number one spark plug out the spark checker was on the number one wire. Well I put my finger over the plug hole and had my bro crank it to see if it was sparking when the piston was up.I ended up seeing that the spark checker was firing at a rapid rate.It shouldn't do that to my knowledge right? It should fire only when the piston is in the up position correct? So would that be the crank sensor causing that or is it something else I'm overlooking?

 

X2.

Changing a water pump isn't going to kill the engine but forgetting to reconnect a sensor will. Double check that everything is connected up after the pump change......something isn't.

 

GEMS ignition is wasted spark, going to fire at the top of the compression stroke and top of the exhaust stroke on every cylinder. One cycle - four coils - eight cylinders = 16 sparks.

 

Well it's fixed thanks for the comments.I'm sorry about my first post it was like 3 am when I posted so was tired.It ended up being a few bad wires so changed them out fired right up.