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Old 20-05-2019   #1
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Question 1.3 multijet (90) turbo issue

hi all,
I have owned my 1.3 multijet for just over a year now. Brought it very cheap as it was it was my first car. I have had many issues with the car so i've read through the forums for people with simmilar issues, then tries to fix them. meaning ive replaced the: MAP, MAF, EGR and Fuel Filter.
Most recently i changed the egr (aka a pain in the a$$) hoping that would sort out the limp mode issues. diagnostics after all were showing insuffisciant flow to egr. thats now fixed.
however, eml light is still on, but this time its saying its the boost pressure sensor. now from what ive read it the wastegate getting stuck, so i tried freeing it. however mine wont budge. not even slightly. ive tried going from underneath, but the car is deceptivly low so thats a no go. any other tips for me to try?
i really want it back out of limp mode, because its a little pocket rocket when its not lazing around.
thanks
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Old 20-05-2019   #2
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Re: 1.3 multijet (90) turbo issue

Are the hoses to and from the turbo pressure converter in good condition?

Also maybe try unplugging it and checking the contacts/terminals,

You could also disconnect the battery and wait for around 10mins or so,
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Old 20-05-2019   #3
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Re: 1.3 multijet (90) turbo issue

The 1.3 Mjt 90 has a VariableVaneTurbo, not a wastegate ...

BRs, Bernie

If someone here helped You fix -or better, understand- your issue, hit the thanks icon @ bottom right corner, it's free and makes us feel helpy ;-)
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Old 20-05-2019   #4
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Re: 1.3 multijet (90) turbo issue

Any ideas on his issue B
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Old 20-05-2019   #5
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Re: 1.3 multijet (90) turbo issue

Quote Originally Posted by Bernievarian View Post
The 1.3 Mjt 90 has a VariableVaneTurbo, not a wastegate ...

BRs, Bernie

If someone here helped You fix -or better, understand- your issue, hit the thanks icon @ bottom right corner, it's free and makes us feel helpy ;-)
so what does this mean? i thought i had been pushing on the wasetgate to try and get it to open? ill attach the bit i've been trying to get to move.

i've attached the image i've been using to help. i have been trying to free what is highlighted in the red box
Attached Thumbnails
Click image for larger version

Name:	turbo_zpsa9f79959.jpg
Views:	8
Size:	88.7 KB
ID:	200406  
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Old 20-05-2019   #6
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Re: 1.3 multijet (90) turbo issue

Quote Originally Posted by llamallama View Post
Are the hoses to and from the turbo pressure converter in good condition?

Also maybe try unplugging it and checking the contacts/terminals,

You could also disconnect the battery and wait for around 10mins or so,
all the hoses seem to be in good condition, i've disconnected the battery before with no success.
I'll try disconnecting the boost sensor
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Old 20-05-2019   #7
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Re: 1.3 multijet (90) turbo issue

Here's one on the bay

https://rover.ebay.com/rover/0/0/0?m...2F183604841686

In case you might need another
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Old 20-05-2019   #8
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Re: 1.3 multijet (90) turbo issue

thank you very much!
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Old 20-05-2019   #9
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Re: 1.3 multijet (90) turbo issue

No worries mate
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Old 21-05-2019   #10
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Re: 1.3 multijet (90) turbo issue

Hi Limpyjet (or whoever is hidden here),

the picture is from 75hp 1.3 MJT and is actually a wastegate turbo. The one that is used with the 90hp engine has variable vanes and even if it looks similar it's totally different inside and the way it's managed by the ECU.

It has the same kind of rod connecting the actuator to the moving plate inside the turbo which can also get seized. If this happens OR if you miss the vacuum (pump, pipe, accumulator, E-valve, actuator), the boost will be too high for a moment and the ECU will switch to limp mode, and stay there if the fault is not fixed.

BRs, Bernie

If someone here helped You fix -or better, understand- your issue, hit the thanks icon @ bottom right corner, it's free and makes us feel helpy ;-)
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Old 21-05-2019   #11
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Re: 1.3 multijet (90) turbo issue

Quote Originally Posted by Bernievarian View Post
Hi Limpyjet (or whoever is hidden here),

the picture is from 75hp 1.3 MJT and is actually a wastegate turbo. The one that is used with the 90hp engine has variable vanes and even if it looks similar it's totally different inside and the way it's managed by the ECU.

It has the same kind of rod connecting the actuator to the moving plate inside the turbo which can also get seized. If this happens OR if you miss the vacuum (pump, pipe, accumulator, E-valve, actuator), the boost will be too high for a moment and the ECU will switch to limp mode, and stay there if the fault is not fixed.

BRs, Bernie

If someone here helped You fix -or better, understand- your issue, hit the thanks icon @ bottom right corner, it's free and makes us feel helpy ;-)
okay, i should still attempt to free the actuator? or is there something else i should try?
thank you for the help
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Old 21-05-2019   #12
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Re: 1.3 multijet (90) turbo issue

Quote Originally Posted by limpyjet View Post
okay, i should still attempt to free the actuator? or is there something else i should try?
thank you for the help
Check for miss of vacuum first, go the easy way:

- from the actuator there is one small pipe going to the electrovalve
- from the electrovalve there is another one that goes at the back of engine
- at the back of engine there is the accumulator
- the accumulator is connected to the vacuum pump on the battery side of engine

Check for any of those pipes broken or badly leaking and repair if found bad.

If all is fine, by-pass the electrovalve so the vacuum will always apply to the actuator (verify this point); now the rod must be completely pulled, if not, the actuator membrane is "kaputt", if the vacuum doesn't pull the rod, the vanes rotating disk is seized in the turbo: needs removal of entire turbo, opening and cleaning ...

I bet on a broken hose near the accumulator.

BRs, Bernie

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Old 21-05-2019   #13
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Re: 1.3 multijet (90) turbo issue

Quote Originally Posted by limpyjet View Post
okay, i should still attempt to free the actuator? or is there something else i should try?
thank you for the help
Here's a couple of videos which will help you understand what is probably going on with your variable vane turbo. This exact problem (stuck vanes and overboost) happened to my boy's Fabia 1.9 PD. We managed to clean it out by dropping the exhaust pipe off the turbo and using a can of foaming oven cleaner injected inside to clan out the carbon deposits. We did 3 applications leaving about 1/2 hour each time for the cleaner to dissolve the carbon and flushing out with the garden hose well each time before refitting the exhaust. the car ran fine for the next 3 years when we sold it - it was still going well at that time.



The variable vanes are there to spin up the turbine wheel at low engine revs thus reducing turbo lag, then as engine speed rises - and so exhaust gas volume increases - the vanes deflect so that not so much force is applied to the turbine. If the vanes jam it's usually in the resting (so max boost) position which is why you get limp due to overboost.

Have a look on you tube there are lots of videos posted - that's where I learned about using the oven cleaner. Other, dedicated, products are available.

If you decide to have a go yourself It's a mucky job and the oven cleaner stings a lot if you get it on your arms - definitely wear goggles! Good luck
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Old 21-05-2019   #14
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Re: 1.3 multijet (90) turbo issue

Quote Originally Posted by Bernievarian View Post
Check for miss of vacuum first, go the easy way:

- from the actuator there is one small pipe going to the electrovalve
- from the electrovalve there is another one that goes at the back of engine
- at the back of engine there is the accumulator
- the accumulator is connected to the vacuum pump on the battery side of engine

Check for any of those pipes broken or badly leaking and repair if found bad.

If all is fine, by-pass the electrovalve so the vacuum will always apply to the actuator (verify this point); now the rod must be completely pulled, if not, the actuator membrane is "kaputt", if the vacuum doesn't pull the rod, the vanes rotating disk is seized in the turbo: needs removal of entire turbo, opening and cleaning ...

I bet on a broken hose near the accumulator.

BRs, Bernie

If someone here helped You fix -or better, understand- your issue, hit the thanks icon @ bottom right corner, it's free and makes us feel helpy ;-)
Bernie, I am in absolute agreement with your advice and an actuator problem will give the result reported (overboost).

However in Limpyjet's second post (picture of turbo) he/she? seems to be saying that they've been trying to move the linkage manually (by hand)? If the vanes are not seized then the linkage should move relatively easily in this way (done it many times myself) which is why I decided to go for the seized vanes scenario. The only thing I'm a little unsure about is if it's an electric/electronically activated wastegate then can you still move them by hand or would you have to pop the linkage off so you won't disturb the actuator motor - I've only ever "fiddled" with diaphragm types.

regards
Jock
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Old 21-05-2019   #15
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Re: 1.3 multijet (90) turbo issue

Quote Originally Posted by Bernievarian View Post
Check for miss of vacuum first, go the easy way:

- from the actuator there is one small pipe going to the electrovalve
- from the electrovalve there is another one that goes at the back of engine
- at the back of engine there is the accumulator
- the accumulator is connected to the vacuum pump on the battery side of engine

Check for any of those pipes broken or badly leaking and repair if found bad.

If all is fine, by-pass the electrovalve so the vacuum will always apply to the actuator (verify this point); now the rod must be completely pulled, if not, the actuator membrane is "kaputt", if the vacuum doesn't pull the rod, the vanes rotating disk is seized in the turbo: needs removal of entire turbo, opening and cleaning ...

I bet on a broken hose near the accumulator.

BRs, Bernie

If someone here helped You fix -or better, understand- your issue, hit the thanks icon @ bottom right corner, it's free and makes us feel helpy ;-)
thank you very much! i'll run through this is list a little later. Hopefully i will just be a vacuum problem.
i drove the it last night and once it was up to temperature i could hear the turbo. this could be that there is a vacuum problem and that the ecu inst able to reach the amount it expects to because it is leaking somewhere.
Ill report back later with how it goes and any further questions
Cam, aka limpyjet
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