i am working on my daughters 98 disco w/ 4.0 & auto. the caris difficult to start when engine is cold. starts right up when warm. a couple other people have worked on this and no change. so i was ask to look at it.
first thing i did was tune it up. new plugs, wires, air filter, fuel filter, oil & filter. i also cleaned the throttle body did a seafoam decarbonize and replaced vacuum lines. the next day it still did not want to start. after a number of tries it finally does start and works all day if drivin throughout day.
so i checked the manifold pressure. sits around 16" at idle (might be a little low) and fuel pressure. fuel is at 18 to 20 psi.(i think it should be over 30) it does hold pressure steady when off so i think the injectors andcheck vavle are ok. i pinched the return line and there was no change in fuel pressure. so before i spent the money on a fuel pump is there anything else i can try.
also when i was changing the fuel filter i turned the key to check the fuel pump. it put out a lot of volume(did not have a gauge on it.)

 

Too many possibilitys, call me later this morning and I'll walk you thru what to check next.
303-862-7680

 

fuel pump,filter and injectors also fuel rail could be clogged if it is a high mileage car,also saw one that the battery was faulty causing the gems mod to freak out

 

it was the pump as expected. replaced and got 30 psi right away. car starts and runs well. rather than pay the $400 to $500 for new pump/sneding unit assembly i was able to adapt a pump for a 95 to 02 range rover into the disco 1 sending unit housing. ( i got the unit for 130 used.) fits perfectly with no mods just a simple pump swap. i spent alot of time looking forideas about replacing just the fuel pump and found none. so before you spend the money on a complete assembly for the 97 to 99 disco 1 know that you can be creative if you know what you looking for and can compare pictures online.

 

wtg glad you got it fixed