I recently replaced the #5 and #6 glowplugs after doing 1 thru 4 before winter. I took the IM off and the #4, 5 and 6 hard lines for easier access. Now, when I start it in the morning the motor, misses, shakes and idles poorly after it sits overnight. It drives away fine, no misses. I finally got all the air out and it stopped nailing. When I start it anytime during the day or when I leave work, it starts and idles perfectly.
What's up?

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1987 300D 146K Original #14 Head
One eye on the road, the other on the temp. gauge

Gone But Not Forgotten
1983 380 SEL Long gone
1983 300SD Wish I hadn't traded it in on a 90' Corvette
1989 300SE My all time favorite
1995 E420 Went like a bullet

Two likely possibilities:

1. Something glow plug related.

2. Fuel system getting a little air in it when it sits overnight.

I'd check #1 first.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.

Ad one more.
If the Valve/s in the Fuel Supply Lift Pump are not sealing the Fuel will drain back to the Fuel tank and the Lift Pump sort of loses prime.

Does the problem go away or improve if the Fuel Tank is full or if the rear of the Car is higher than the front of the Car when it sits overnight?

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84 300D, 82 Volvo 244Gl Diesel

The below Fuel Supply/Lift Pump is similar to yours.

New Style fuel Supply lift pump rebuild
OM606 Fuel Pump Rebuild

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84 300D, 82 Volvo 244Gl Diesel

I will turn the car around and move it down the driveway where there is more slope and see what happens. Tank is 3/4 full right now. The car sat all weekend with a full tank and did not run any smoother on Monday morning.
I will look into this though.
Thanks.

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1987 300D 146K Original #14 Head
One eye on the road, the other on the temp. gauge

Gone But Not Forgotten
1983 380 SEL Long gone
1983 300SD Wish I hadn't traded it in on a 90' Corvette
1989 300SE My all time favorite
1995 E420 Went like a bullet

Did you remove the small return lines on the injectors when you removed the hard lines?
Those small lines can leak air into the fuel lines and cause rough starts and NOT look like they are leaking externally. If they are more than a few years old, order a meter of fuel line and replace all of them.

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My Truck.. 2007 DODGE, 5.9 Cummins, 6spd stick, 4X4. My car..1977 240D, OTHER WHEELS...1955 VW Oval window bug, European Delivery (Holland) with a 1700cc, 2 barrel, Porsche drum brakes. 1939 WILLYS Pick-up. 1967 Triumph 200cc Tiger Cub. 1976 Honda 550F 4cyl Motor Cycle.

really? I've not heard this.
I was under the impression that the only issue these lines could have is lost fuel.
Hmmmm...

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

They are hooked into the main return line which in turn are hooked to the injection pump.

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My Truck.. 2007 DODGE, 5.9 Cummins, 6spd stick, 4X4. My car..1977 240D, OTHER WHEELS...1955 VW Oval window bug, European Delivery (Holland) with a 1700cc, 2 barrel, Porsche drum brakes. 1939 WILLYS Pick-up. 1967 Triumph 200cc Tiger Cub. 1976 Honda 550F 4cyl Motor Cycle.

Ditto...

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1987 300DT
2002 Ford F-250 7.3 Crew Cab Short Bed

Return lines between injectors were replaced in the fall when I installed reconditioned injectors (Monarch nozzles) from Sean Watts
Yesterday morning it idled much better upon start up. I recenly filled the tank. I'm wondering if the previous tank was slightly contaminated?

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1987 300D 146K Original #14 Head
One eye on the road, the other on the temp. gauge

Gone But Not Forgotten
1983 380 SEL Long gone
1983 300SD Wish I hadn't traded it in on a 90' Corvette
1989 300SE My all time favorite
1995 E420 Went like a bullet

check your fuel Pre-heater. Mine sucked air and problems started out like this and got worse. they are known fail points.

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hum.....
1987 300TD 311,000M Stolen. Presumed destroyed