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Juddering loss of power @ 1800 rpm
#1
Hi all,


I have a 1.6 110 multispace  70k and ever since owning it i have had a little issue.
Since last week i occasionally felt this loss of power which lasted less than a second about once a month.
The clutch has felt a little grindy when depressed and released, gradually getting worse.
The clutch is not slipping at all.
The judder seems to happen around 1800 rpm.

I took it to my local mechanic and for some reason diagnosed the fault as an egr failure. So they replaced it as the old one failed on their test bench!
After picking it up there was no change, issue still there.

Went back to talk with the owner, he test drove it and believes it could be a sensor picking up a fault up on the flywheel. He said that can fail and the sensor is sending back info which is causing this loss of power / judder.

I believe the previous owner did tow a caravan.

Anyone have any experience or advice i can pass on to the mechanic?
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#2
crankshaft sensor seems like a possible culprit, together with the EGR valve and/or also the system that controls the variable vanes of the turbo (in the more recent systems/motors this is now electric instead of vacuum operated, and somehow fails more often).
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#3
Thanks, have passed on the information. Let's see what they find. I bet i have to fork out for a new turbo.
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#4
Take it to a Citroen garage to get it sorted with the proper Lexia software. It's sounds like you are chucking good money after bad at the moment.
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#5
Or look for an independent Citroen garage in your area with the relevant software and get them to look at it. As opensause says you are guessing at the minute and it can get expensive replacing random parts. 30 minutes diagnostics can save a lot of money and hassle.
Are we there yet????? Huh
Ex 1.6hdi van now 3 seater 1.4 multispace
[-] The following 1 user says Thank You to Tomcat3 for this post:
  • polar
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#6
No fault codes found, nobody is 100 % sure what the issue is.
I think i know, turbo. Had a quick look and their seems to be a little play.
The car had main dealer servicing until i received it then i carried out the service myself using correct oil etc.
Anyway I'm going to order a turbo core and strip it all down and carry out a clean of parts etc.
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#7
Any ideas how to get the correct part number from the turbo?
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#8
The turbo is meant to have play in the shaft it runs on an oil bearing as such so play needs to be there. Now the question how much? That is down to experience and my arms wont reach to Wiltshire so you need to get someone who knows what they are doing - not easy nowadays.
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#9
Just seen Tomcat3 post - there is more to a diag than fault codes (live data) ignore Tomcat3 post at your peril and wallet.
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#10
Had it on live data, injector tolerances etc all checked. Nothing showing at fault
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