almost dead tdi..

[zizz]

i'm getting this with vag com...

VAG-COM Version: Release 311.2-N

Control Module Part Number: 028 906 021 AF
Component and/or Version: 1,9l R4 EDC SG D80
Software Coding: 00000
Work Shop Code: WSC 00000
5 Faults Found:
00553 - Mass Air Flow Sensor (G70)
28-00 - Short to B+
00539 - Fuel Temperature Sensor (G81)
30-00 - Open or Short to B+
00522 - Engine Coolant Temperature Sensor (G62)
30-00 - Open or Short to B+
00777 - Accelerator Position Sensor (G79)
27-00 - Implausible Signal
00741 - Brake Pedal Monitoring
27-10 - Implausible Signal - Intermittent


the sympoms are like this
Possible Symptoms

* Difficulties with starting a cold engine.
* Starting the engine when engine is warmish or warm, idle rpm immediately is 1200 - 3000 rpm.
* RPM at idle is irregular.
* With all engine temperatures seldom idle rpm will vary between 900 - 1000 rpm.
* With engine warm (90 °C) the engine temperature suddenly drops (70 °C) and slowly comes back to 90 °C.
* Bad acceleration during warming up.
o Diesel: an indication is extreme long time burning time of the glow indication light.

and they are all right... what to do now?
what could be wrong? ecu?

can i go for m-tdi. i've got golf mk2 1.6d laying here, i would put a tdi in it, bosch pump from 1.6d on tdi, could this work?

[zukgod1]

Looks like a bad MASS, APS (I call them a TPS) and maybe a bad coolant temp sensor.

Poor idle, cold start and GP not reacting properly all linked to those 2 items.

Cant help ya on the others though.
I'm sure someone will chime in.

[VW_Commuter]

Where are you located?  You need to fill out more info in your profile.  I would go over to the The TDIClub and check out their forums, the guys over there have a forum specifically for VAG-COM questions and will be able to help you a lot easier than we can over here.

[jtanguay]

the mTDI conversion is a bit more difficult than putting a 1.6 pump on and going.  although i've seen someone put a TDI head on a 1.9 pump and it worked.  power wasn't as good as the TDI, but still worked.  i'd imagine he needs a hell of a lot more advance to create comparable performance.

depending on how much you want to spend on this car, you can weigh in both options.  1. go mTDI and never worry about replacing MAF's & other bull*** sensors etc.  2.  replace bad sensors etc for about $200 or so and hopefully they'll last you.  unless you pay like $300 for a MAF though, expect it to last a year or two...

going mTDI the right way would be to have the pump professionally built.  expect around $1500 for this.  I think that is Giles' going rate plus he requires a TDI & non TDI pump.  so going mTDI is more of a committment then an investment, although mechanical things always last longer than delicate electronics-the pump will ALWAYS react the same no matter what, unless it wears out.  this can be good, or bad.  electronic pumps regulate fuel to outside factors which can save you a few bucks at the pump...

so like the above posters have said, check out TDIclub, weigh in the cost of fixing all of your stuff, and then compare the two options.  all the info is here for conversions.  just don't expect to slap on a 1.6/1.9 pump onto  your motor and for it to work right.

[Powered by Spearco]

I'm just guessing here but first check the grounds at the battery. They need to be clean and tight. Next check the state of charge of your battery, must be a minimum of 12.5 volts. Check electrical connections at the injector pump and at the coolant temp swt. Clean them with electrical contact cleaner if need be. Also, when coolant temp. at gauge is at
190 deg. F, check the temp. of the lower coolant hose. Should be hot too. If not, might be a T-stat thats not functioning correctly. Make sure that the fans come on at the right temp. also.
Could be that the coolant temp. sensor is faulty? Causing the other codes engine related. As for the brake pedal monitoring and the accelerator position sensor, could be bad brake light swt. connection and APS connection.

[the caveman]

If this is still in a mk4 [1999 1/2 -2004] Jetta , it sounds like you have what is a common ground problem that those models had. Worse on gassers but i've done so many of those it's sick. First remove the battery and the plate it sits on. Underneath you will see i large and maybe 6 smaller grounds [ which will be bungled to 2 tabs on the body].Loosen all of them, and clean the surfaces with sandpaper, small wire brush etc. Then get some dielectric grease [an auto parts place should have -even look for "spark plug grease"]and smear a small amount anywhere they contact, also clean the bottom of the nuts where they touch. Do the same at the ECM whereit sits near the wipers. There are grounds  near the connector.  I would even do the big one where it attaches to the block, and while you are there make sure that big special bolt is tight. Erase the codes and then if any show up they are the ones to concentrate on. It's pretty rare to have so many dtc's, uness you also have a major connector failure somewhere.

[zizz]

i'm from croatia..

it's golf 3, 96yr

it's not problem in grounds..

it's not the problem in sensors, i checked that... i don't know what else, i tried everything and it's always the same, as describes.... don't know what to do next...

[the caveman]

you have some large connector or wiring failure. How can there be different faults from so many different places.  open or short to B+
  means no signal to those components. could also be a ECM failure.

[jtanguay]

i'm from croatia..

it's golf 3, 96yr

it's not problem in grounds..

it's not the problem in sensors, i checked that... i don't know what else, i tried everything and it's always the same, as describes.... don't know what to do next...

apparently theres a guy from czech republic that does mTDI pumps for about $950USD or so.  still not as good as Giles' IMO, but closer to you.