John,
Unless you are a very competent DYI or a diesel mech, best not mess with the IP.

If you have fuel being delivered to all but one cylinder, the motor will start unless there is some other problem that has not been mentioned. You can let it crank for 20 seconds ( time it with your watch dont guess).

As you emptied out the #1 fuel line , it will take a very long time (several minutes) cranking to refill it. You should have refilled it when you put it back on.

If the car is spluttering & trying to start, maybe you need to check your glowplugs, if they are all working it will help the motor start with one dry injector. When you are cranking you must have your foot to the floor if you want it to start.

Keep recharging your battery.

__________________
Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving