Idle Issues - 2010 1.6i Citi Golf

[tango]

Hi guys.

Apologies in advanced for my weird descriptions

Idle on the car is rough, jumps between 900-1100 rpm. On idle it sometimes does a "hard dip". Other times it hard dips and just maintains idle or cuts out.When it cuts out, it usually starts again immediately. On one occasion though, it took about 4 tries to start.
Rarely, it will hard dip during acceleration.
Car cold starts without an issue.
On the cambelt side there is squeaking sound that sounds like a duck . Only occurs when the car is at running temperature.

A mechanic suggested changing, plugs, plug leads, rotor and distributor cap which was all done. Problem persisted. He then suggested that the throttle body was in bad state, so that was cleaned. Problem is still there. Car was never scanned. The guy said that cambelt noise is the tensioner and I "must live with it" until it needs to be changed. I don't do those kind of things. To me a weird noise means something is wrong and must be repaired.

At this point I'd like to know if someone can advise me on what to do or is there someone that can look/scan the car. I don't want to keep replacing things that are not solving the problem.

Thanks in advance.

[panic-mechanic]

a) the duck sound is the cambelt that is set too tight. In the long run either the belt will fail or the tensioner will. Undo the cover - relax a bit of the tension and the duck should leave.
b) if you have tried a throttle body reset and or if your MPI is giving an error code that relates to a lambda sensor it has gotten an internal fault that now seems to crop up more and more on MPI.
So either find another box, change it to MP9 or to aftermarket. Just make sure the timing is set correctly before flying off to the other pastures as retarded timing will also cause bad idle on them.
Was the cambelt replaced around the time the duck invaded your engine bay.

[tango]

a) the duck sound is the cambelt that is set too tight. In the long run either the belt will fail or the tensioner will. Undo the cover - relax a bit of the tension and the duck should leave.
b) if you have tried a throttle body reset and or if your MPI is giving an error code that relates to a lambda sensor it has gotten an internal fault that now seems to crop up more and more on MPI.
So either find another box, change it to MP9 or to aftermarket. Just make sure the timing is set correctly before flying off to the other pastures as retarded timing will also cause bad idle on them.
Was the cambelt replaced around the time the duck invaded your engine bay.

Hi Panic.

Thanks for understanding the duck issue.
Cambelt was changed about a year ago. Noise started about 3 months ago.
Picked up a lamda sensor fault about 4 months ago and replaced it with a new sensor.
Will try and get the timing checked.

Thanks for the advice.

[panic-mechanic]

Yeah the bad news is that once mpi give that lambda error that does not go away there is something that has gone wrong inside that box. We have not found a simple fix yet.

[tango]

Yeah the bad news is that once mpi give that lambda error that does not go away there is something that has gone wrong inside that box. We have not found a simple fix yet.

That is bad news indeed.
Got the car scanned. It is the lambda sensor acting up again. Cannot get the code cleared. The sensor was changed 4 months ago.
Also found that the dizzy was seized. Almost impossible to move.

The good news is that the misfire and rough idle is gone. Turns out the car didn't like the new plug leads. Put the old leads back and misfire was gone. One of the plugs(2 weeks old) was also messed up. Timing was only slightly off.

Think its time to get rid of this car. Its driving me insane.

[tango]

Any ideas of the cost of going MP9 or aftermarket?

[Ben-mk3]

i need the same thing so called around yesterday,

there is a guy in Capetown, Allen.
he can supply the short harness for R1800 - he said his harness is plug and play, and has all new plugs.
Decoded Mp9 ECU is R2500 supplied by him.
and then he mentioned post net shipping is R99

so total : R4399 with his Ecu

or you can get your own ecu and get it decoded. then you will just need the harness from him.
he can also decode for R500

aftermarket depends on who will do it and what management you choose.
i got one quote of R6950 for dicktator, supplied installed and tuned.
price seems quite high to to me, will have to get more quotes.

there are guys on here who have successfully cut and joined the old MPI harness to the MP9 ECU plug.
see link below.
https://www.vwclub.co.za/forum/viewtopi ... I#p2577436

im considering this option. but will need the ECU and the Plug.

please post back here once you get your sorted

[175SBU]

I am almost done with my MPi to MP9 conversion, i will post the DIY next week.








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[Ben-mk3]

OP did you sort yours out ?

[mlungisimbizane]

Hello
Can anyone please tell me how to stop a rough idling on the jetta 2.0 fsi engine coz its so rough its likei am dancing to a hip hop song

[panic-mechanic]

Start your own thread and stop bombing on other people's.
If you don't know how - select the sub forum you want to post into ro if you don't know then select the general one - then click new subject.
you need to say which version of the 2l fsi and do you know the entire history. If like a BWA it could have had the balancer shafts removed which can cause that.

[tango]

OP did you sort yours out ?

Unfortunately not.
I'm still trying to get someone to confirm that it is indeed the management that is the problem.

[tango]

Update:

Turns out Panic was correct. The MPI did bomb out. Thanks Panic. Big ups!

Was replaced with Dicktator in hurry as the car left me on the side of the road and had to have it towed urgently and the guys at Dicktator were the only ones who could assist at that time.

The car now runs fine.

Bad news is I was only told about the cold start issues after I got the car back. I should have researched better but I was desperate at the time.
Anyway around this?

Also the cluster still works off the MPI but the light doesn't. Anyway around this?

Thanks guys.

[panic-mechanic]

What cold start issues? Generally speaking dicktator ain't too bad to start cold, you just need to fiddle the tuning a little bit. Learn the software and play with th cold start stuff.
What light are you talking about?

[tango]

What cold start issues? Generally speaking dicktator ain't too bad to start cold, you just need to fiddle the tuning a little bit. Learn the software and play with th cold start stuff.
What light are you talking about?

Car will not idle on a cold start. I have to hold the accelerator down a bit to keep it idling. After about a minute it just about idles. After driving for a few minutes its fine. According to the tuner this is normal.

When you turn on the driving lights, the dash light is supposed come on, the one the lights up the cluster when its dark. Sorry I know I'm not explaining this well.

[panic-mechanic]

Ok not idle aftermstartung - yes just live with that. Not starting is a differnt thing.
The dash lights has nothing to with the dicktator. It's possible simply Dead globes or possibly a switch issue. Do theynstill have a dim function these days - maybe that is simply turned down all the way.

[tango]

Hi guys.

Thanks Panic. Yes I'm getting used to living with the cold start.

An update: Car runs extremely well now. No issues at all.

I'm thinking about removing the catalytic converter.
Would I be correct in thinking that the lambda sensor is now redundant?
So a straight pipe would not cause any issues?
Would the car need to be re-tuned for such a small difference?

Thanks guys

[panic-mechanic]

Drop cat. Ne need to retune - lambda is not working yes.

[tango]

Drop cat. Ne need to retune - lambda is not working yes.

Thanks Panic.

What does "drop cat" mean?

[panic-mechanic]

Remove - take out - get rid off - cut out. take your pick.

[tango]

Remove - take out - get rid off - cut out. take your pick.

Cool. Thanks man.

[ACJ]

i need the same thing so called around yesterday,

there is a guy in Capetown, Allen.
he can supply the short harness for R1800 - he said his harness is plug and play, and has all new plugs.
Decoded Mp9 ECU is R2500 supplied by him.
and then he mentioned post net shipping is R99

so total : R4399 with his Ecu

or you can get your own ecu and get it decoded. then you will just need the harness from him.
he can also decode for R500

aftermarket depends on who will do it and what management you choose.
i got one quote of R6950 for dicktator, supplied installed and tuned.
price seems quite high to to me, will have to get more quotes.

there are guys on here who have successfully cut and joined the old MPI harness to the MP9 ECU plug.
see link below.
viewtopic.php?f=94&t=213846&p=2577436&h ... I#p2577436

im considering this option. but will need the ECU and the Plug.

please post back here once you get your sorted

Hi I know Im year late but my 2009 Vw Tenaciti 1.4i also starting give the same problems. Im consider going the mp9 route. Do you perhaps have any contact details for Allen?

[UDC]

i need the same thing so called around yesterday,

there is a guy in Capetown, Allen.
he can supply the short harness for R1800 - he said his harness is plug and play, and has all new plugs.
Decoded Mp9 ECU is R2500 supplied by him.
and then he mentioned post net shipping is R99

so total : R4399 with his Ecu

or you can get your own ecu and get it decoded. then you will just need the harness from him.
he can also decode for R500

aftermarket depends on who will do it and what management you choose.
i got one quote of R6950 for dicktator, supplied installed and tuned.
price seems quite high to to me, will have to get more quotes.

there are guys on here who have successfully cut and joined the old MPI harness to the MP9 ECU plug.
see link below.
viewtopic.php?f=94&t=213846&p=2577436&h ... I#p2577436

im considering this option. but will need the ECU and the Plug.

please post back here once you get your sorted

Hi I know Im year late but my 2009 Vw Tenaciti 1.4i also starting give the same problems. Im consider going the mp9 route. Do you perhaps have any contact details for Allen?

Check Facebook Marketplace, there was a guy selling plug and play looms from Mpi to Mp9
https://m.facebook.com/marketplace/item ... _query=Mpi to mp9&tracking=%7B"qid"%3A"6839012092591777125"%2C"mf_story_key"%3A"3932233723483679"%2C"commerce_rank_obj"%3A"%7B%5C"target_id%5C"%3A3932233723483679%2C%5C"target_type%5C"%3A0%2C%5C"primary_position%5C"%3A-1%2C%5C"ranking_signature%5C"%3A0%2C%5C"commerce_channel%5C"%3A503%2C%5C"value%5C"%3A0%2C%5C"upsell_type%5C"%3Anull%7D"%7D