Rolls-Royce and Bentley Forums banner

1 - 20 of 20 Posts

·
Registered
Joined
·
9 Posts
Discussion Starter #1
I continue to have problems with my 1986 Bentley turbo carburettor. The starter motor comes into operation, but the engine does not always turn on. The last time that happened to me, the motor is switched on only after many attempts. Also, while driving often seems that do not work all cylinders, outbreaks occur in the silencer, sometimes the engine comes to fade, consumption seems excessive. The mechanic has made many interventions and replacements (candles, plug wires, various cables, brush and sensor distributor). The electronic control units (UD26368 and UD23735) have been checked and tested in Britain by Bowling Engineering LTD and are ok. What else can we do? Thanks.
 

·
Registered
Joined
·
1,283 Posts
Buonasera Ugo
Am I to understand
1) your engine is hard to start
2)you have a misfire and back fire through the exhuast
3) your mechanic has changed the plugs and leads and the distributor electronics checked
Am i right so far?
Has he changed the distributor cap?
I would suggest changing the electronics inside the distributor anyway
our friend in France has just changed his and is now ok
Best wishes
Mike
 

·
Registered
Joined
·
9 Posts
Discussion Starter #4
He did not replace the distribution cap

Thanks, Mike. More or less as you say. Sometimes the car will not turn on at all. My mechanic did not replace the distribution cap because it claims that it is ok. I will tell him what you wrote to me about the French which solved the problem. Thanks again.
 

·
Registered
Joined
·
9 Posts
Discussion Starter #5
Warm

Thanks, Singlemalt. The problems are more when the engine has warmed up a bit (but not so much).
 

·
Registered
Joined
·
440 Posts
Are the outbreaks / backfires in the exhaust (really loud shotgun bangs) or through the carburettor ( more like a loud sneeze / pop ) ? ?
 

·
Registered
Joined
·
440 Posts
An exhaust backfire usually says that the fuel is getting into the cylinders but no spark.

A carb backfire is more likely to be a lack of fuel problem.

What were the condition of the candles (spark plugs) when they came out?

Does it give a cough or splutter when you have cranked it over without starting and then turn off the ignition?
 

·
Registered
Joined
·
9 Posts
Discussion Starter #9
To Everythingsrollsroyce

The mechanic says that are the outbreaks backfires in the exhaust. Sometimes, but not always, when the engine not starts, the situation may be the one described by you.
 

·
Registered
Joined
·
9 Posts
Discussion Starter #10
There may be a problem in the switchbox?

Dear Sirs, thank you for your valuable suggestions.

I mentioned it to my mechanic, who suggests replacing the distributor cap and ignition coil. The distribution base plate & pick-up and rotor arm have already been replaced without any result.

With regard to starting problems, it might also be a problem of the switchbox?

Turning the key to the start position, the starter motor comes into operation but sometimes the engine fails to start, as if it does not arrive current to the spark plugs, exactly. Turning the key back to the acc/lock position, it seems that the motor has a kind of gasp. Would someone know tell me something about it?
 

·
Registered
Joined
·
208 Posts
that sounds very similar to my problem which was cured in December by replacing the electronic pick-up module inside the distributor. Unfortunately it was the most expensive part to replace, but Hey Ho all is now well.
 

·
Registered
Joined
·
2,090 Posts
Mulsanne Turbo with Turbo and Solex carburetor is considered by some specialist as a kind of nightmare.
It is not very reliable and apparently they are not really compatible.

A friend worked on one more than one month to make it work not so bad.
He changed all the seals
It is very difficult to adjust carburetor with the Turbo.

Anyway, this not help you but warn you. it might not be easy.

Jean
 

·
Registered
Joined
·
3 Posts
Hi
Ive a 1983 mulsanne turbo. A nice car but not without its problems. No mojo.... starts fine runs fast but when driving there is no real power to overtake, no turbo.
An unwelcome flat spot when the acceleration is requested.
I've left it with an old school carburetor man and he informs me that the next replacement is the coil. The solex has been rebuilt with new parts. The car has electronic ignition. I hope this car sings again. My 5th Bentley after 14 Rolls Royce models. Any ideas why it's acrobating?
Kind regards
Stephen
 

·
Registered
Joined
·
2,090 Posts
Turbo Garett with Solex 4A1 was not the best choice and it is a source of major problem and disappointment.
Good luck with a very controversed car .

It is better to take a non turbo such a Mulsanne or Brookland or a Turbo R.

You need a really specialist of the Solex 4 A1 because it is a pain to adjust it on this car and it is not particularly reliable.

Sorry, just wrote what I know for a long time. I will nor advice to buy a Mulsanne Turbo because I have seen so many troubles around me. But I know that some can bring pleasure indeed. Bu a Turbo R is so much better and reliable.
 

·
Registered
Joined
·
3 Posts
Thanks for your time on this.
I choose to believe there is a strong modern solution to this
And I'll persist until the car is singing again. Ill keep you posted on this
Best regards Stephen mullan
 

·
Registered
Joined
·
1,283 Posts
Hi Stephen
I had a 1983 mulsanne turbo too.
I found lots of silly linkages on the carb to stop the second throttles opening, they are to stop fueling when cold .
I took them off as they engage even though the engine was hot and stopping performance.
Good luck
Mike
 

·
Registered
Joined
·
3 Posts
Hi Stephen
I had a 1983 mulsanne turbo too.
I found lots of silly linkages on the carb to stop the second throttles opening, they are to stop fueling when cold .
I took them off as they engage even though the engine was hot and stopping performance.
Good luck
Mike
Hi Mike
I received an update from my mechanic today. He informed me that the carburetor is perfect and has found a hairline fracture on the coil. He believes the coil is original and has ordered a new replacement. I've asked him to relocate the coil to the inner wing as i believe it was too hot an area being placed behind the vee.
I really hope he is right.
Kind regards Stephen
 

·
Registered
Joined
·
2,090 Posts
Coil are known for failure. It should be replaced I would say at least every 30 year because they dry inside and create strange issue difficult to diagnose. A bad coil can be good cold and bad hot or reverse, or both of course bu in that case it's easier.
 

·
Registered
Joined
·
2,294 Posts
Note the directions for mounting. Some (oil filled) can only be mounted vertically, epoxy filled coils are usually more versatile.
 
1 - 20 of 20 Posts
Top