turbo_accelaration

[hector]

Hello,
New owner of an elan M100, 92.000 km
In the accelaration phase, the turbo get directly in action, is outlet pressure increase but we hear some intermittent take off.

I am french speaking from Belguim .Sorry for my english
Is this more understanding ?
Hector

[Doug]

we definitely need Michael to step in with his Dutch here . . .

[Doug]

okay -- who knows French?

Hector, just type the problem in French or use a translation website or both so we can get more information about the problem.

[Monty]

Doug,

Just wondering is he getting over Boost

Hector, are u getting an engine light on the instrument cluster? have a read of this

http://www.lotuselancentral.com/repair/aldl.htm

[hector]

Monty,
no light , only a slow down of the car's accelaration and then again an increasing of the speed .
Pas de lampe qui s"allume au tableau de bord. La voiture accélere et ensuite l'accélération s'arrete tres peu de temps pour reprendre ensuite et lors de la reprise d'accélération cela se ressent ( l'impression que le turbo se remet en fonction avec un secousse de la voiture)
Hector

[Doug]

hector, I still do not know enough about the problem to say for sure, but it is a possibility that the hall effect sensor in the CAS (cam angle sensor unit) is going foul. If so replacement of this sensor would fix the problem.

but like I said I do not know this is the problem, but it is a possibility.

[F1 LOTUS]

Peut-etre verifiez et remplacez les bougies?
Lisez ceci: -

http://mononc.free.fr/VanagonInfo/VanagonBougie.htm

Desole pour mon mauvais Francais

[hector]

To all,
On the same subject about my Elan M100, I make test yesterday and in fact when I puch the engine, the outlet turbo pressure increase to more than 0.92 bar and I read on the "LOTUS SERVICE NOTES , Section EC, page 59 " that if the boost pressure in excess of 0.92 bar ( 13.5 lb/in²) is detected for more than 0.5 sec the fuell pump will switch off .
I am pretty sure is what appen but I don't now why and which part of the engine is in default and wath to do.

Lorque j'accélère, la presion de sortie du turbo monte au maximun, soit plus de 0.92 bar et la sécurité limitant la pression coupe l'arrivée d'essence ( ce qui est prévu et renseigné dans le manuel) , dès que la pression diminue, l'essence revient automatiquement et il se produit un léger choc dans le véhicule . Je ne sais pas quelle partie du moteur est en cause et ce qu'il faut régler ou remplacer.

[Doug]

It sounds like you are describing what we call "overboost." This is too much turbo pressure, and like you say the car will cut the fuel off if this happens.

One common cause is a sticking wastegate actuator rod. This is the little metal rod that moves the wastegate. Grab the rod with some molegrip/pliers and give it a wiggle to be sure it is moving, then drive the Elan and see if anything changes.

[hector]

Doug,
It seem that we progress but can you explain a little more where is locate the "gate actuator rod".
Tanks a lot
Hector

[Enright]

Have a look at the first picture on this page.
You can see the little silver actuator rod just below the turbo. It leads from a small vacuum diaphragm unit on the right and disappears behind the heat shield on the left.

Now thank nice Mr.Dico for taking his engine out to show you.

[hector]

I find the place , I need to acquire a little molegrip in the next days.
Hector

[John_W]

I find the place , I need to acquire a little molegrip in the next days.
Hector

Hector,
A lot of people have had trouble with that little rod sticking. I hope it is the reason for your problem, because it is easily fixed.
If it doesn't work, ask us again for more ideas.

To avoid any doubt, the rod you need to move is in the picture below:

good luck,
John

[hector]

to all,
Good result the problem is solved. I make wath you suggest and the turbo pressure stop at 0.6 bar when I push the accelerator.

Tank a lot to everybody.
Hector

[stephearak]

je suis francais également et menbre du club lotus france, il faut peut etre vérifier l'aprovisionnement en air du moteur et voir si l'intercooler est intacte mais également faire vérifier l'ouverture des papillons de gaz.Si tu as des problemes écrit moi directement, il sera peut etre plus simple de les régler en francais.

Hello,
New owner of an Elan M100, 92.000 km
In the accelaration phase, the turbo get directly in action, is outlet pressure increase but we hear some intermittent take off.

I am french speaking from Belguim .Sorry for my english
Is this more understanding ?
Hector