Map sensor

[bhaphane123]

Good day Everyone

I have been experiencing a problem with my car in relation to engine power. Its a VW Golf 1.4 Citi sport, fuel injection.
Firstly the take off speed of the car is just not the same, on inclines i experience engine power loss...i can hardly reach 140km/h with the car its even a problem trying to overtake,
and also the petrol consumption is just too much. Lastly wen i start the car in the morning there's a bit of white smoke that comes but then it stops.
So i was suspecting the Map sensor because the car is just not going anywhere, i don't know if i'm right tho...your help and views will be highly appreciated.

[kingozzi]

I have a polo 6R.. when my maping sensor died the car 1st lost power and finally ddnt start..dont know if thats much help

[dubz-on-drugz]

Could be timing?

Sent from my SM-G920F using Tapatalk

[Ashveer03]

Get somebody experienced to have it checked out, if im not mistaken the citi sport is mpi, and u could be experiencing the dreaded mpi ecu issue. There are a few threads of the symptoms of a faulty mpi ecu, read through them and check if u have similar symptoms

Sent from my SM-G531H using Tapatalk

[bhaphane123]

I changed my map sensor, still there is no change, i also did my timing again but car still has no power.@ Ashveer03 , i think its best to let someone experienced check it out, because most people i have went to cant seem to find the problem.

[panic-mechanic]

No location provided.
No year model provided.
Unable to offer help or input.

[bhaphane123]

No location provided.
No year model provided.
Unable to offer help or input.

Its a vw golf 1.4i sport, 2009 model...im based in the south of johannesburg, Oakdene.

[panic-mechanic]

Ah 2009 was the intro year of MPI. Have the timing set on a dyno for best power and get somebodybto scanit with vcds. If it tells you lambda sensor open or short circuit then I have bad news for you.

[Ahmed.Syed]

What would the lambda sensor open or short circuit mean Panic? I am also experiencing this issue on my 2009 Rox 1.4i

How does one go about working around the MPI issue?

[panic-mechanic]

You change it for another management.

[Ahmed.Syed]

Any recommendations on which aftermarket management would serve as a good replacement?

[panic-mechanic]

The one the tuner you are going to take it to likes.

[Mojay]

Hi Panic / All,
I get the following Lambda DTC's on 2008 Tenaciti 1.4i
Does this also point in the faulty ECU direction or can this be resolved without replacing the ECU?
Also, where exactly is the o2 sensor and Lamda sensor located on the car?

-------------------------------------------------------------------------------
Address 01: Engine Labels: None
Part No: 17S 906 258 AA
Component: Citi 1400LE 01350
Coding: 00000
Shop #: WSC 01107


3 Faults Found:
00537 - Lambda (Oxygen Sensor) Regulation
19-10 - Lower Limit - Intermittent
00525 - Oxygen (Lambda) Sensor (G39)
03-10 - No Signal - Intermittent
00561 - Mixture Adaptation
15-00 - Adaptation Limit (Add) Not Reached
Readiness: N/A

-------------------------------------------------------------------------------

[panic-mechanic]

Knock yourself out. It sits under the car. Most exhaust shops would be able to help you fit it chop chop. Clear the fault and see.

[Clintie]

I have the same problem on a 2003 Golf mk4 with 1.6SR motor. Its lost mega power over the years can barely go uphill. Also changed MAP sensor and no fix.

Where is a good place to find aftermarket ECU and not break the bank?
Clintie

[panic-mechanic]

Mk4 had a very different motronic unit and basically nothing related to the city issue will apply there.
On those start by replacing the lambda sensor and see that it receives power. Don't assume that what applies to one car does automatically to another.
This issue is MPI specific. Basically only found on the citi golfs.

[Pynoxim]

I have the same problem on a 2003 Golf mk4 with 1.6SR motor. Its lost mega power over the years can barely go uphill. Also changed MAP sensor and no fix.

Where is a good place to find aftermarket ECU and not break the bank?
Clintie

There's no MAP sensor on a Mk4 1.6, just a MAF. Dicktator 60-2 or something similar will maybe be in the region of R6k fitted and tuned.

[Clintie]

I have the same problem on a 2003 Golf mk4 with 1.6SR motor. Its lost mega power over the years can barely go uphill. Also changed MAP sensor and no fix.

Where is a good place to find aftermarket ECU and not break the bank?
Clintie

There's no MAP sensor on a Mk4 1.6, just a MAF. Dicktator 60-2 or something similar will maybe be in the region of R6k fitted and tuned.

Yes sorry I meant the MAF, I stand corrected. Thanks for the info.

[Clintie]

Mk4 had a very different motronic unit and basically nothing related to the city issue will apply there.
On those start by replacing the lambda sensor and see that it receives power. Don't assume that what applies to one car does automatically to another.
This issue is MPI specific. Basically only found on the citi golfs.

Thanks for the advice. Apologies to You the OP if I hijacked the thread slightly.

Clintie

[panic-mechanic]

Original thread is 2 years old and the OP has not visited since.....
your car could have lost power for many other reasons than blaming the management. You could very likely put something else on and have the same exact issue. Have you ever scanned or had is scanned to see if it complains about something ?.

[Clintie]

Original thread is 2 years old and the OP has not visited since.....
your car could have lost power for many other reasons than blaming the management. You could very likely put something else on and have the same exact issue. Have you ever scanned or had is scanned to see if it complains about something ?.

Yeah the last diagnostic I had done said MAF sensor and something about Catalytic convertor I think. I am going to have the CAT removed soon and see if that also helps. Im told they can cause performance issues over time but that remains to be factually confirmed.....

[panic-mechanic]

A dead maf sensor will certainly make it lazy. Yes cats can and do get blocked up over time specially if it was driven softly all it's life.

[Clintie]

A dead maf sensor will certainly make it lazy. Yes cats can and do get blocked up over time specially if it was driven softly all it's life.

Kewl. Much appreciated for all the feedback Sir!

Clintie

[Mojay]

Panic,
My messages getting stuck in outbox. I would like to bring my car for timing and tuning if possible. CAM belt whining (like its fitted too tight) and timing seems off. Please let me know how best to contact you .
mojeena@gmail.com

[panic-mechanic]

your messages aren't stuck. I just haven't checked them or been on the forum a few days. Wow people are impatient.
061 507 6017. Whatsapp in Daylight hours.