Help diagnosing C4 VTS problems (Ex Davie LEZ VTS 180)

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Fake Concern
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Re: Help diagnosing C4 VTS problems (Ex Davie LEZ VTS 180)

Post by Fake Concern » 03 May 2018, 20:19

RichardW wrote:
03 May 2018, 12:41
It doesn't appear to have a MAF, so not sure how it is picking up a flow coherence error. I can't see an EGR valve either, but I suspect it has one? Does it have a fuel filter, and has it been changed?

The fuel filter is just a strainer in the tank, not likely to have been changed, but if it was blocked wouldn't it be giving an error for running lean?
RichardW wrote:
03 May 2018, 13:16
Yes, I saw that, but it calls it an 'air pump' not an EGR valve :?

There is also a vac solenoid on the air intake circuit, but there's no indication what it's for!!


I believe the vac solenoid is to open the second intake on the air resonator at higher revs.

Another question, if the timing belt had been put on one tooth out, could that give the errors we have? Presumably the valve timing being out would affect both intake and exhaust flow?

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Re: Help diagnosing C4 VTS problems (Ex Davie LEZ VTS 180)

Post by Fake Concern » 04 May 2018, 22:25

Starting seem like I'm clutching at straws now! However, this article is very interesting

http://enginedtc.com/p1161-citroen-c4

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Re: Help diagnosing C4 VTS problems (Ex Davie LEZ VTS 180)

Post by xantia_v6 » 05 May 2018, 06:37

Fake Concern wrote:
04 May 2018, 22:25
Starting seem like I'm clutching at straws now! However, this article is very interesting

http://enginedtc.com/p1161-citroen-c4

Image

I would not take that site seriously at all. It is just a collection of generic OBD codes which have generic descriptions and the name of a specific car model attached. They couldn't even give a valid engine type for the C4. Does anyone here have a C4 with a turbocharged single cylinder engine with opposed pistons?

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Re: Help diagnosing C4 VTS problems (Ex Davie LEZ VTS 180)

Post by Fake Concern » 13 May 2018, 20:49

I am now totally confused by this!
I finally got Lexia/Diagbox to work again after reinstalling Windows three times due to Lexia refusing to install without errors. Now I have these faults
IMG_5205.JPG
IMG_5206.JPG
IMG_5207.JPG
So now a missfire? Could that be a failing Coil pack?
Also P1623-Engine torque given *1 What does this even mean?
Plus what was interpreted as intake manifold leak P1160, is now shown as incoherence between butterfly position and 1 wire/pressure

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Re: Help diagnosing C4 VTS problems (Ex Davie LEZ VTS 180)

Post by xantia_v6 » 13 May 2018, 21:22

If you look at the mileage and engine RPM where each of those faults occurred, how do they relate to when the car went into limp mode?

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Re: Help diagnosing C4 VTS problems (Ex Davie LEZ VTS 180)

Post by Fake Concern » 13 May 2018, 21:46

xantia_v6 wrote:
13 May 2018, 21:22
If you look at the mileage and engine RPM where each of those faults occurred, how do they relate to when the car went into limp mode?

No idea, somehow this time the report didn't get saved, so I only have the photos. I cleared the faults and will drive it a bit before reading any codes again.

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Re: Help diagnosing C4 VTS problems (Ex Davie LEZ VTS 180)

Post by Cutac » 25 May 2018, 14:46

Not going to be helpful, but could you please explain 'open the second intake on the air resonator at higher revs'.
Where is that second intake located? I thought there's just one pipe from the grille to the resonator and then from the resonator to the throttle body.

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Re: Help diagnosing C4 VTS problems (Ex Davie LEZ VTS 180)

Post by Fake Concern » 25 May 2018, 20:45

Cutac wrote:
25 May 2018, 14:46
Not going to be helpful, but could you please explain 'open the second intake on the air resonator at higher revs'.
Where is that second intake located? I thought there's just one pipe from the grille to the resonator and then from the resonator to the throttle body.

In the resonator box

http://www.aussiefrogs.com/forum/techni ... rtant.html

Just for Cutac, my VTS, LEZ
IMG_5122.JPG

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Re: Help diagnosing C4 VTS problems (Ex Davie LEZ VTS 180)

Post by Cutac » 27 May 2018, 01:03

Interesting, thanks :)
Is there a way I can test if this works? :D
Car is faultless on Diagbox, but still :D

Wheels on yours look nice, I guess they are quite a bit lighter than Resolfens?

I've got a picture of mine taken on Thursday. It was a rainstorm and I got very wet but it paid off, or at least I think it did :)
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Re: Help diagnosing C4 VTS problems (Ex Davie LEZ VTS 180)

Post by Fake Concern » 13 Jun 2018, 21:52

Cutac wrote:
27 May 2018, 01:03
Interesting, thanks :)
Is there a way I can test if this works? :D
Car is faultless on Diagbox, but still :D

Wheels on yours look nice, I guess they are quite a bit lighter than Resolfens?

I've got a picture of mine taken on Thursday. It was a rainstorm and I got very wet but it paid off, or at least I think it did :)
Image

I agree
Don't know
I still don't know (mine always gives faults I didn't know it had on Lexia/Diagbox)

The wheels are Team Dynamics Pro Race 1.2 in 18 inch x 8 size and are a lot lighter than the resolfen when you pick them up. Seem exactly the same when driving though!

Great picture! Are you on Instagram?

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Re: Help diagnosing C4 VTS problems (Ex Davie LEZ VTS 180)

Post by Cutac » 19 Jun 2018, 15:16

Really, no difference between wheels when driving? I would expect much lighter wheels to transform the car.

I agree about faults. My gives weird faults on Diagbox which cancel themselves out. When I switch automatic AC on, Diagbox/BSI records temperature sensor fault, but then immediately says the opposite. Weird, but I suppose it's some kind of a confusion for some reason :)

Thanks, but I'm not on the Instagram. I was thinking about it but realized no one would follow a guy taking pictures of Citroens :D

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Re: Help diagnosing C4 VTS problems (Ex Davie LEZ VTS 180)

Post by GiveMeABreak » 19 Jun 2018, 17:25

Are you trying to say Citroen owners are all sad? :rofl2:

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Re: Help diagnosing C4 VTS problems (Ex Davie LEZ VTS 180)

Post by Cutac » 19 Jun 2018, 22:36

Well, not much people like Citroen at all, and even less people would like to see photos of a c4 every few days :D

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Re: Help diagnosing C4 VTS problems (Ex Davie LEZ VTS 180)

Post by Fake Concern » 21 Jun 2018, 21:17

Cutac wrote:
19 Jun 2018, 22:36
Well, not much people like Citroen at all, and even less people would like to see photos of a c4 every few days :D

Lots of C4 fans on Instagram, have a look!

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Re: Help diagnosing C4 VTS problems (Ex Davie LEZ VTS 180)

Post by Cutac » 22 Jun 2018, 00:44

You're not mad, man!
There's a huge fan base, and to make it better, a girl has a red Coupe and lives 100 kilometers from me 8-)

For real, I might just make an Instagram account. I'll have you as a follower. Probably... :mrgreen: