Is anyone out there able to identify this part (see attached).

I have been told it is the waste gate solenoid, the boost control solenoid and the pressure converter solenoid.

It is off my 54 plate fiat eleganza 1.9jtd. The top pipe (red) runs to the turbo actuator, the bottom (black) is the constant vacuum feed.

My car is in constant 'limp' mode. Max 3000rpm. However if I bypass this solenoid i.e. directly connect the red and black pipe together my turbo spins up once again and I can rev away and drive around with a constant turbo whine. However I fear this will not last long!!

I have 10.5v at the feed point to the solenoid so I'm guessing that it may be a mechanical failure of the part and if replaced all would be well in my multipla world????

Any help greatly received.

Many thanks,

John.

You are right it is the valve that controls the waste gate and it is not working correctly. The unit is controlled via the engine ECU which determines how much blow you need and the valve opens and supplies the vacuum in measured lumps to the waste gate to get it moving in relation to the throttle position. Actually, you are not going into limp mode - that is a bit different - what is happening is you are driving a car without the turbo giving any boost.
Your trick of by-passing the valve to give maximum boost tells me it is the valve and not some other more technical problem.
Good luck.
Stephen

Stephen,

Thank you for your prompt reply.

Will it knacker anything if I use the car with it bypassed in the short term? (I have reconnected it correctly at the moment).

Also when I initially check I didn't have a voltage but now I have.
The car is revving freely again but the EML is still on. Will this go out if this was the fault or do I need to get it reset?

In case I need a new part I got my youngest son (with good eyes) to read the part number;
70051900. I am having trouble sourcing this part and it gives me an alternative part number (looks the same). Will this be ok IYHO.

Many thanks,

John

Re: Vane Control Valve

OK, in answer to your first question, the load on the engine and throttle position will dictate how much boost is dumped or used by the vane. If you bypass the control valve you will effectively be using maximum boost regardless of the normal parameters. Will it do any damage? I suppose it might if there is a weakness in component which resents being clobbered with maximum boost all of the time. Personally, I would just get it fixed as it seems you have nailed the problem. I could mutter on about the ECU not sending a signal to the valve but that is just scaremongering. I expect all vehicles fitted with the JTD engine and has a vacuum operated waste gate to have a similar valve regardless of the engine power rating.
The engine light is coming on because you have disconnected the valve. If it is reconnected it should go out either immediately or after a few fault free engine operating cycles provided there is no other fault present causing it to come on or the ECU detects something else due to the over boost scenario which is possible.
I do not know the part number for the vane control valve but that is what it is called and I am sure a FIAT dealer will put you right although there must be quite a few of these on breakers shelves.
Regards
Stephen

Stephen,

Thanks again for your reply. The part number is; 70051900. However I have been quoted £160+vat. That really does sound far too much!!

A petrol head friend suggested fitting a manual boost controller in place of the valve' setting it up and forgetting about it. He reckons that it would be fine as I drive like it's Sunday every day. Cost of this is about £15-£20, less than the vat on a replacement.

I thought I would ask on here first as my friend has been known to talk out of his arse on occasions.

Many thanks,

John.

p.s. The EML is on continuously and has been since the timing belt and alternator were replaced last month. That cost far too much money hence the motivation for sorting it as cheaply as possible to get the car to run normally again.

There are a couple of valves for sale on Ebay at the moment for not very much money so you could always buy one of those. There must be hundreds on scrapyard shelves as well. I do not think they have to be Multipla specific other than having to be artistically creative with the mounting brackets.
My view is that the ECU takes in inputs and creates outputs according to what it can see is happening in and around the engine. Therefore, the amount of turbo pressure is matched with the amount of injected fuel which is also controlled by the temperature of the air going through the air cleaner, oil and coolant temperature. Now, if something goes a bit haywire like your valve has and you replace it with a manual controller or you just leave it on full boost and you drive it sensibly then probably nothing will happen very much other than it may do something to the fuel consumption or reduce the life of some components which for these older cars would be impossible to judge in any event. The effect on emissions could cause a problem at an MOT but even this is unlikely as these engines are usually well inside the parameters anyway. A tree-hugger might have a sleepless night at the thought of your inefficient engine but these engines are not very high tech and are tough as old boots provided you remember to look after the cam belt so you could probably get away with some cost containment. For me the EML lit up would drive me crackers and my Asperger's would have me hospitalised if I did not fix it!
Good Luck Anyway
Stephen

As said visit a scrapper or give da motors in wickford Essex a ring

Thanks again Stephen,

I have purchased a 'cheapo' second hand one off of fleabay so I will attach that when it arrives. However after I had completed the transaction I found out that the part I need has a 'new' product number which I can procure from East Germany for a very reasonable price of £43 delivered to my door. That is now plan 'B'.

I understand what you mean about having routine and order and to be honest the beep and light did initially mess with my ASD. However I think I will miss the light and beeps (I get an extra one in the morning due to the low ambient temperatures we are currently experiencing) when they eventually vanish.

Gods speed and cheers,

John.