VW Kombi MP9 Running Rich & Fault Code 00533

• Home
• Forums New posts Search forums
• What's new Featured content New posts Latest activity
• Members Current visitors
• Wiki
• Support Videos
• How-To: How to Get Verified How to Post an Auto-Scan How To Post Pictures How To Get Repair Info / Wiring Diagrams

Log in Register What's new Search

Search

Everywhere Threads This forum This thread Search titles only By: Search Advanced search…

• New posts
• Search forums

Menu Log in Register Install the app Install How to install the app on iOS

Follow along with the video below to see how to install our site as a web app on your home screen.

Note: This feature may not be available in some browsers.

• Home
• Forums
• Support: (Only verified members can post)
• Car Repair Support:

You are using an out of date browser. It may not display this or other websites correctly.You should upgrade or use an alternative browser. VW Kombi MP9 Running Rich & Fault Code 00533

• Thread starter Thread starter sparkysteve
• Start date Start date Aug 1, 2015

Status Not open for further replies.

• 1
• 2
• 3

Next 1 of 3

Go to page

Go Next Last Aug 1, 2015 #1 S

sparkysteve

Verified VCDS-Lite User

Verified Joined Jun 23, 2015 Messages 30 Reaction score 8 Location UK VCDS Serial number C?ID=253663 Hi, I have a VW 2004 Brazilian Kombi imported to the UK. It is fitted with a Bosch MP9 ECU and various other VW golf and polo fuel injection parts (what was lying around in VW Brazil) onto a Air-cooled Flat4. The Car is fitted with a single Lambda Sensor Before the CAT The van was running fine for a couple of years BUT now it failed its emission (MOT) test for High CO The CO At Idle (450-1500rpm) was 0.633% (0.5% Being the pass) and 0.435% & 0.671% at Fast Idle (2500-3000rpm) The Lambda is also checked and at Fast Idle and was 3.094 (Lambda limits are 0.970 to 1.030) I have noticed that it also has getting poor fuel economy. There are no other running problems So I have assumed that the Engine is Running a very Rich Mixture. (Not sure about the High Lambda as this assumes a lean too much air) I have done the following 1. New Lambda Sensor - I noticed that the old one was heavily soot covered) 2. General Engine service (Plugs, Tappets, air filter, Oil, Distributor cab and rotor arm) 3. Flushed Fuel System with Injector Cleaner & Sprayed Carb cleaner down throttle body. 4. Connected up Vacuum Gauge - 18 to 22 "Hg at idle and seems normal 5. Looked for false air leaks using Butane/Propane gas when observing the idle speed. Found none As I have a ODB2 ECU I have taken some VCDS-Lite information and modifying a label file I have been able to take some scans. My AutoScan is as follows: Code: copy VCDS-Lite Version: Release 1.2 Wednesday, 29 July 2015, 12:25:40:14290 Chassis Type: 1G - VW Golf/Jetta II Scan: 01,02,03 ------------------------------------------------------------------------------- Address 01: Engine Labels: 237-906-021.LBL Controller: 237 906 021 .3 Component: BOSCH MP9.0 MPSF 2401 Coding: 0261204975 Shop #: 1037356657 VCID: 2F11A76DFE05 1 Fault Found: 00533 - Idle Speed Regulation 10-00 - Adaptation Limit Not Reached Readiness: N/A End -------------------------------------------------------------------------------------------------- This 00533 Fault code has been present for a few years and if I clear the fault code it comes back after around 10 seconds. I have log files for measuring blocks 000-009 but will only post them if you require them. Everything "looks normal" Any ideas? My Ideas are: The Idle Stabilisation Valve Staying open during running The Catalytic Converter / Exhaust being blocked MAP Sensor - Reading incorrectly but not error Coolant Sensor - Reads correctly and heats up during driving. Reset Basic Settings - Don't know how for this ECU. Reset ECU - Heard from south Africa the MP9.0 needs a reset to clear codes 00533 but don't have HEX-USB adapter Any help / ideas would be welcome! Steve Aug 1, 2015 #2

Jack@European_Parts

Gone But Not Forgotten

Professional VCDS User Joined Jan 29, 2014 Messages 21,923 Reaction score 9,326 Location Montgomery, NY, USA VCDS Serial number C?ID=57337 Sounds like idle related adaption and maybe a stuck or to high FPR setting. Maybe see if the CAT is large enough for proper conversion of CO. Chances are the programming was for ethanol and not regular petro fuel........ so maybe see a specialist since from Brazilian region. Aug 1, 2015 #3 S

sparkysteve

Verified VCDS-Lite User

Verified Joined Jun 23, 2015 Messages 30 Reaction score 8 Location UK VCDS Serial number C?ID=253663

Jack@European_Parts said: Chances are the programming was for ethanol and not regular petro fuel........ so maybe see a specialist since from Brazilian region. Click to expand...

Thanks for the reply. No They did a Ethanol/ Alcohol version of this engine and also a Regular Petrol version. Its engine for the regular Petrol.......Yeah the 5500 miles to the nearest (UK to Brazil) specialist might be the only problem with that :-) The CAT is standard and has passed two years of emission testing. They do "rust" from inside in the UK climate so it could be the CAT. This is the most expensive part to get hold of in the UK at £600 (They cost £60 in Brazil) I am planning to measure the fuel pressure to see if stuck injector or regulator BUT would would the data show a reduced injector on time? Also would I not get a fault code showing it could not lean out the mixture? I have logs from a year ago when things where fine and can take logs now but I am unsure what I should be looking for. Please think of any other things I could do to test / measure / log before starting to replace expensive parts in vain. Aug 1, 2015 #4

Jack@European_Parts

Gone But Not Forgotten

Professional VCDS User Joined Jan 29, 2014 Messages 21,923 Reaction score 9,326 Location Montgomery, NY, USA VCDS Serial number C?ID=57337 You need to correct the idle issue first and foremost.......recommended! Aug 1, 2015 #5 S

sparkysteve

Verified VCDS-Lite User

Verified Joined Jun 23, 2015 Messages 30 Reaction score 8 Location UK VCDS Serial number C?ID=253663

Jack@European_Parts said: You need to correct the idle issue first and foremost.......recommended! Click to expand...

Understand. So to test it can is use the Output Test-03 function in VCDS Lite? Can this be used to test the Function of the Idle Stabilisation Valve (ISV)? I was thinking to remove ISV from behind the Throttle Body, plug it's connector and then use the Output test to control the valve to see if it operates cleanly. Does this sound like a good idea? Steve Aug 1, 2015 #6

Jack@European_Parts

Gone But Not Forgotten

Professional VCDS User Joined Jan 29, 2014 Messages 21,923 Reaction score 9,326 Location Montgomery, NY, USA VCDS Serial number C?ID=57337 I would recommend instead of guessing....... get the repair manual for the associated builds and ref the corrective action or test procedure. Aug 1, 2015 #7

Uwe

Benevolent Dictator

Administrator Joined Jan 29, 2014 Messages 59,576 Reaction score 40,201 Location USA VCDS Serial number HC100001 Agreed. Somewhere there should be documentation for that engine management system, which will include what scan-tool functions it supports and related procedures, but nobody who's stopped by this thread so far is familiar with it; it's just not something we see every day (or really at all!). -Uwe- Aug 1, 2015 #8

Jack@European_Parts

Gone But Not Forgotten

Professional VCDS User Joined Jan 29, 2014 Messages 21,923 Reaction score 9,326 Location Montgomery, NY, USA VCDS Serial number C?ID=57337 Well..... I have some hard copy factory blue book manuals from the Caribbean, on that conversion through Inter-Americana exporter out of FL USA..... from ages ago. I have run into some calls over the years about certain emissions issues when exported. The advice I gave was to retrofit to the POS ( fitting right? ) 032 ME7.5.10 series BAH ecu, harness, and, TV since it gets rid of this shit idle stabilizer. South America areas outside of Brazil.....non ethanol. It too has forward and rear OXS for the CAT....... to get much cleaner operation, while also using only a MAP sensor with no MAF. Then you can go fly by wire. It can too be found in Brazil, Mexico, Argentina, Worldwide/USA industrial divisions....... Pre and post CAT as scrubber is recommended. You should probably find out if SMOG ( MOT ) or TUV will allow for this retrofit in your country. In the UK there are tons of 032 030 and 036 series later ecu configs for the pickings cheap......! Good to know that SMOG/MOT is watched in the UK, because I understand there is a tuner there....... that deletes such emissions devices, and is in for a heap of trouble here in the USA. Last edited: Aug 1, 2015 Aug 2, 2015 #9 S

sparkysteve

Verified VCDS-Lite User

Verified Joined Jun 23, 2015 Messages 30 Reaction score 8 Location UK VCDS Serial number C?ID=253663

Jack@European_Parts said: I would recommend instead of guessing....... get the repair manual for the associated builds and ref the corrective action or test procedure. Click to expand...

Ok. Found the limited vw repair manual. As I thought it does not really contain much in way of information or fault finding. Regarding the idle stabilisation valve it says check resistance. All correct. Then remove valve clean and check opening when 12v is applied. All ok. The hoses looked in good condition but added and extra clamp to make sure and leak checked. All good. I did notice that the valve does not completely close it has around 10-20% still open at rest. This is limited by a screw which was still factory set so I assume its the basic level of idle then any more it opens the valve. Reset fault code. Has not return straight away but will drive some more and see if it comes back. Hard to say if it was the cause of rich mixture but will do another exhaust analysis to see if still rich. As for output tests the ecu only has the carbon filter valve so not much use. More information to follow. The throttle body sensor is reading a little higher than the min spec of 6 degrees. It reads about 7. Might have a look how to adjust the tps and closed value. Aug 2, 2015 #10

Jack@European_Parts

Gone But Not Forgotten

Professional VCDS User Joined Jan 29, 2014 Messages 21,923 Reaction score 9,326 Location Montgomery, NY, USA VCDS Serial number C?ID=57337

Ok. Found the limited vw repair manual. As I thought it does not really contain much in way of information or fault finding. Click to expand...

It absolutely does..... Aug 2, 2015 #11 S

sparkysteve

Verified VCDS-Lite User

Verified Joined Jun 23, 2015 Messages 30 Reaction score 8 Location UK VCDS Serial number C?ID=253663 Not sure what manuals you have access to but Bentley etc do not cover the brazilian Kombi. Have you access to vw workshop manuals ? Elsawin or erwin. Have a look for a 2004 kombi model 7x21A1 with the UGA engine and see what limited data vw hold on that model. Cannot even find a WD or emissions data on this model. Aug 2, 2015 #12

Jack@European_Parts

Gone But Not Forgotten

Professional VCDS User Joined Jan 29, 2014 Messages 21,923 Reaction score 9,326 Location Montgomery, NY, USA VCDS Serial number C?ID=57337 Ah my German Erwin for the world says it's there........ RB isn't probably the best manual for this I'd agree with that. Ever consider maybe the N80 is stuck open dumping fuel vapors causing a rich mixture? Aug 3, 2015 #13 S

sparkysteve

Verified VCDS-Lite User

Verified Joined Jun 23, 2015 Messages 30 Reaction score 8 Location UK VCDS Serial number C?ID=253663 Hi, Thanks for the help / advice and replies - Really great! Which Erwin site address did you find Kombi 7X2 Models on? I cannot find it on Erwin.de. Can you please point me in the right direction? I have the Canister valve (N80) on my list of next things to Test. I have logs which show it operates once up to temperature but I suppose it could be stuck fully open and dumping extra fuel in causing it to be rich. My other is to test the fuel pressure as stuck injectors or Over pressure or faulty pressure regulator could be causing it to run rich. Steve Aug 3, 2015 #14

Jack@European_Parts

Gone But Not Forgotten

Professional VCDS User Joined Jan 29, 2014 Messages 21,923 Reaction score 9,326 Location Montgomery, NY, USA VCDS Serial number C?ID=57337 http://www.vw.com.br/pt/servicos/manuais/manual_resgate.html http://www.vw.com.br/pt/servicos/manuais/Manual_Instrucoes1.html Aug 4, 2015 #15 S

sparkysteve

Verified VCDS-Lite User

Verified Joined Jun 23, 2015 Messages 30 Reaction score 8 Location UK VCDS Serial number C?ID=253663 Hi, Thanks for the links. I actually managed to find the workshop manual on Erwin.de (the mothership!) after doing a VIN search. Following the Fault code 00533 I investigated the ISV. Using and following the workshop manual I did the following: 1. Removed ISV valve from rear of TB 2. Tested Resistance - In spec 3. Tested using +12V supply - Valve operates. 4. Cleaned the ISV - Was not that dirty just a little grease etc. 5. Tested again - Noticed that the ISV is about 20% open when un-powered. Opens 100% when powered I am assuming that the 20% open is the natural idle set as it is limited by a screw which was sealed with factory varnish 6. Checked all hoses & connecting to the ISV. Added an extra clamp at the top of the TB to ISV as was a little loose fitting 7. Performed a quick leak check and the ISV and pipes seal well. 8. Refitted. 9. Connected up VCDS and cleared fault codes. 10. Ran engine - All seemed as before. 11. Drove van to work - Checked - No fault codes. 12. Drove van from work - Checked - Fault code! 00533 - Idle Speed Regulation 10-00 - Adaptation Limit Not Reached So the fault code still appears - At least I know my ISV is clean and pipes are OK. I have also confirmed that the fault code went away. The drive to work is flat and not much start stop. The drive home is uphill and start stop so suspect the idle drooped below its set point. So here is what I am thinking. The engine does appear to struggle to return from throttle to idle. It seems to dip to low rpm before recovering to natural idle. No wonder the fault code appears as the ECU and ISV is reporting that intermittently the idle is too low! So what can be causing this? - I am thinking that the ECU is not actually operating the ISV. The idle is actually being set by the 20% ISV end stop. So here is what is next: 1. Run some VCDS logs of rpm, Throttle Position etc under different loads and check if the idle rpm is ever controlled. 2. Add some more electrical load on the engine at idle (Lights, heaters etc) while logging 3. Scope the ECU to ISV signal and see if the ECU is actually sending a signal to open the ISV. 4. Inspect and measure the continuity from ECU to ISV to check wiring. Will report back in a few days. Aug 4, 2015 #16

Jack@European_Parts

Gone But Not Forgotten

Professional VCDS User Joined Jan 29, 2014 Messages 21,923 Reaction score 9,326 Location Montgomery, NY, USA VCDS Serial number C?ID=57337 It would be wise to set the basic settings of the idle stabilizer as per the repair manual. Aug 4, 2015 #17 S

sparkysteve

Verified VCDS-Lite User

Verified Joined Jun 23, 2015 Messages 30 Reaction score 8 Location UK VCDS Serial number C?ID=253663

Jack@European_Parts said: It would be wise to set the basic settings of the idle stabilizer as per the repair manual. Click to expand...

Ah. I read through the manual again and could not find how to set the basic settings. Maybe it's there but I did or don't understand how. Can you help explain how this might be done? Aug 4, 2015 #18

Jack@European_Parts

Gone But Not Forgotten

Professional VCDS User Joined Jan 29, 2014 Messages 21,923 Reaction score 9,326 Location Montgomery, NY, USA VCDS Serial number C?ID=57337 Ahhhh GRRRRRRR BOOK! What engine code? UGA petrol....... I suggest section Group 01 Evaluating measured value blocks, display groups 0...9 and significance. Don't forget to check throttle cable offset......... Last edited: Aug 4, 2015 Aug 4, 2015 #19 S

sparkysteve

Verified VCDS-Lite User

Verified Joined Jun 23, 2015 Messages 30 Reaction score 8 Location UK VCDS Serial number C?ID=253663 "give a man a fish and you feed him for a day; teach a man to fish and you feed him for a lifetime" Teach me once and I will never ask again! OK. I have seen the "Basic settings-04" and will have a go but some guidance would be gratefully received. Aug 4, 2015 #20

Jack@European_Parts

Gone But Not Forgotten

Professional VCDS User Joined Jan 29, 2014 Messages 21,923 Reaction score 9,326 Location Montgomery, NY, USA VCDS Serial number C?ID=57337 I never stated to go to 04 basic settings....... There is a clear difference between using basic settings 0x01-04 in VCDS and setting basics on components mechanically/physically......... which is why I never said 04. Ref the mechanical basics in the sections forward I stated and the block values based on the operations for each BIN bit specification for related components. I can't make the adjustments for you, however, if you were local I would and seriously have tried to help you.

• 1
• 2
• 3

Next 1 of 3

Go to page

Go Next Last Status Not open for further replies. Share: Bluesky LinkedIn Share Link

• Home
• Forums
• Support: (Only verified members can post)
• Car Repair Support:

Back Top