1978 Rolls-Royce Silver Shadow Rough Start

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XOCLIWTB
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1978 Rolls Royce Silver Shadow II, 85000 miles

Whenever I try to start the car it is very rough and I have to give it lots of gas to keep it going. I hear a tick-tick-tick sound. After driving a few miles the car will often behave normally again.

Does this sound like dirty injectors? Bad wire-set? Need new spark plugs or something?

Any help would be appreciated!
Thanks!
Nov 9, 2006 at 6:45 AM
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CANVIS69
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Put your finger on the injectors and see if you feel the tick you hear.At that age it's probably the injectors or the cold star injector(if equiped)
Dec 6, 2006 at 5:16 PM
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JOEMECHANIC
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Isn't that still covered under warranty?(kidding) you might try checking the fuel pressure,pump may be beginning to fail.hope this helps-Joe
Mar 15, 2007 at 4:30 PM
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2CARPRO JACK
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Smooths out when the tick goes away? might be lifters bleeding down?
Mar 16, 2007 at 1:09 AM
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ROLLS-ROYCE SPECIALISTS
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1978 Rolls-Royce Service problem noise from engine when first started , First of all in 1978 they did not have fuel injection. Second when you start a Rolls-Royce in that year some times the brake pumps will make a lifter noise and have nothing to do with poor start up period and or noise , that could be another problem in its self period. Rolls-Royce start up with poor idle could be from incorrect choke settings incorrect fuel adjustment spark plugs shot do to all of the above , also carbs could need rebuilt do to age and floats need replaced do to over fueling ,Poor ignition etc, First go Back to basics remove plugs check for proper firing and pressures in cylinders that the readings are correct and close to each other then move from there, to give a better over all picture, to answer your questions, in a correct manner ,these engines are expensive and not to play around with find people who have correct knowledge of your product , What works with other motor cars will not work with yours, you must use Crew built parts, and the people who know theses cars inside and out period. i would make it a point to become a member of the Rolls-Royce Club in P.A. i am a Rolls-Royce Appointed National Judge And service garage Established out of Ireland in 1934, if we dont know the correct answer we wont make one up! Service tecks from around the world call me and the very few like myself for correct answers and were to start looking for problems, also many of garages send me carbs to rebuild and or sublet to my garage and have them shipped in for repairs! From the answers you were given from other tecks it could be in the areas they have pointed to you but that would be almost very unlikely unless your motor car has been badly over heated in some way!
Jun 20, 2007 at 3:00 AM

Suggested Repair

Treat this as a carbureted engine, not fuel injection. Start with basics: inspect spark plugs and ignition, verify cylinder compression readings are even, and check choke setting, fuel mixture, and carburetor condition including floats. The tick may be the brake pumps and may be unrelated to the rough start. Use correct Rolls-Royce parts and a specialist familiar with these cars.

Conversation Summary

A 1978 Rolls-Royce Silver Shadow II starts roughly, needs extra throttle, and makes a ticking sound, then often runs normally after a few miles. Other replies suggested injectors, fuel pressure, or lifters. A Rolls-Royce specialist said this year has no fuel injection, the tick can come from the brake pumps, and poor cold idle is more likely choke, fuel adjustment, plugs, ignition, or aged carburetors and floats. They advised compression and firing checks first and specialist service.

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