ALH Install into 1999 Jetta Wolfsburg (A3,ABA) - TDI Engine -General Info - VWDiesel.net The IDI, TDI, and mTDI source.

• ALH Install into 1999 Jetta Wolfsburg (A3,ABA) by 4BTA4ME on 15 Nov, 2007 21:03
• I have my ALH hanging in the engine stand for cleaning. It goes in my 98 gasser. I would like some DIY modification ideas for fuel economy, performance and just to make it last longer. I had 80K miles when it was involved in an accident. Here's what I plan on so far.
  1. Stage one chip program
  2.Immo defeat in chip( no instrument cluster from the ALH car)
  3. FMIC with 2" feeds.
  4. EGR defeat in chip and blank off of EGR tap at exhaust manifold.
  5. gasket matched porting.
  6. K&N intake ( original intake destroyed in accident)
  7. home built stainless 2.5" exhaust with flex joint and my recycled Borla muffler from the gasser.
  8. ARP studs.
  9. Timing belt kit with the metal impeller water pump.
  10. .205 nozzles
  I was also wondering if there's any DIY enhancements for the turbo. That's sitting on the bench right now.
                        Thanks.
• #1 by BleachedBora on 16 Nov, 2007 11:09
• I wish I wasn't going out the door right now to dyno the car!
  In any case, drop the K&N unless you want to spend $100+ on new MAFs all the time. Stock airbox and stock air filter have been proven many times over to flow BETTER than the K&N, and they don't destroy such things as MAFs and turbos...
  
  Other than that PM sent!
  Later!
  -BB
• #2 by 4BTA4ME on 16 Nov, 2007 13:05
• Is it the oiling on the K&N that destroys them?
  I need to find something to plug my MAP (or was it MAF) sensor into. I have no stock air box. I need to unplug my sensor from the chunks that are left of my air box and find a replacement of some sort. That was the side of the car that got demolished. Battery exploded and battery acid blow all over the place when it went nova.
• #3 by MikkiJayne on 16 Nov, 2007 17:39
• Urban legend alert  :roll:
  
  

  Quote

  7. Will a K&N filter cause my vehicle’s mass air sensor to fail?
  
  No, it is both impossible and ridiculous.  
  
  It is impossible because we know that the oil treatment on our cotton is very small (usually less than 2 ounces).  Once the oil is properly and evenly absorbed through the cotton, no oil will come off, even under extreme engine conditions.  It is ridiculous, because no dealership or service provider has ever been able to provide us with evidence to support this “myth,” and in fact, our investigations have revealed that even authorized dealerships are simply speculating and do not have the test equipment necessary to know whether the sensor has failed or why. It is even more ridiculous because some car manufacturers use and sell air filters treated with oil on a regular basis. There are also major brands of disposable air filters that are treated with oil. We all use oil for the same reason, it helps in the filtration efficiency of an air filter.  For more information on this topic including videos, see our Mass Air Flow Sensor Statement page.
  
  Out of the millions of air filters we sell, we only receive a handful of consumer complaints each month that a dealership or service provider has blamed a vehicle sensor repair on our product.  We take each complaint very seriously and see it as an opportunity to stop a consumer from being taken advantage of. We investigate the situation thoroughly and take full responsibility for resolving the issue.  For more information on how we educate and persuade the service provider to reconsider their position, see Mass Air Flow Sensor Information & Testing. We are so confident in our ability to resolve these situations and help a consumer fight back that we offer our Consumer Protection Pledge.  
  
  As a result of our standing up for consumer rights and providing assistance to resolve a disagreement, we have had 77 actual sensors sent to us by dealerships who claimed our product had caused them to fail.  Microscopic, electronic and chemical testing revealed that none of the 77 sensors were contaminated by K&N oil (K&N Detailed MAF Sensor Test Results). What is perhaps the single biggest clue to what is going on is that over 50% of these sensors were not broken in the first place for any reason.
  

  
  
  http://www.knfilters.com/MAF/massair.htm
• #4 by jtanguay on 16 Nov, 2007 18:50
• MAF's are delicate to begin with.  I would be more worried about the potential for that little bit of extra dirt to flow into the engine.  probably not much, but every little bit counts.
  
  if you think a K&N will give you 5hp+ though, think again.
• #5 by 4BTA4ME on 17 Nov, 2007 06:14
• Any suggestions on the original topic of DIY suggested improvements?
• #6 by 4BTA4ME on 23 Nov, 2007 20:33
• What are the monitored emissions signals that may generate a MIL on the 2001 ALH engine? I cannot have a MIL when I have the emissions check performed.
• #7 by Slave2School on 23 Nov, 2007 20:42
• The tuner can make sure nothing will show up
• #8 by 4BTA4ME on 24 Nov, 2007 06:31
• Another question.
  I see that the K line runs from the instrument cluster in the ALH diagrams to the Diagnostic port.
  Do the K line signals come over from the ECU to the instrument cluster on the CAN signal lines or does all the K line imformation originate from the instrument cluster? I don't see a K line on the ECU.
  I do not have the ALH instrument cluster and was planning on running the K line to the 1998 Jetta ABA  Diagnostic port. On page 97-353 of my Bentley there is a T44 junction box for the various data signal sources. Can I add my ALH K line to this junction (assuming it comes from the ECU) an sidestep the ALH instrument cluster?
• #9 by Tintin on 24 Nov, 2007 20:45
• On the ALH ECU, the "K" line is located at pin 16 of ECU, you need only to run this wire at your diagnosis OBD2 connector inside the car.
• #10 by 4BTA4ME on 25 Nov, 2007 13:13
• Thanks Tintin.
  I have a couple more questions if you don't mind. Anyone else can feel free to respond to these too.
      1.) Is the speedometer output signal from the ABA  (blue 32/3), compatable with the ALH ECU speedometer signal input (T121/20)?
      2.) The ALH instrument cluster connector terminal identification chart (section 90-5 of Bentley) shows the glow plug light signal coming in on T32/13. I don't have this terminal showing up on the ALH instrument cluster wiring diagram. The only control signals I see at the glow plug relay are ECU signals T121/33 and T121/42.
       2.a.) Are these used in the ECU to create the glow plug indicator light signal?  
       2.b.) Can I assume that the ECU does send a signal over to wire T32/13 on the ALH and inturn send that signal over to my ABA terminal T28/20 (glow plug indicator, MIL indicator)?
       3. As far as sharing the ABA MIL with both the MIL signals and glow plug indication signal, I was thinking of using a steering diode to prevent a signal from the glow circuit going back to the MIL output port of the ALH ECU.
• #11 by Tintin on 25 Nov, 2007 19:41
• I do not remember exactly what color is the VSS signal, I think It's white and blue line on it, if you are not sure, you can connected the signal of the ECU on this one in the engine bay.
  
  For the glow light, take the power (+12VLT) direct at the glow plug and run this wire inside the car and plug a little light on it.
• #12 by 4BTA4ME on 26 Nov, 2007 06:16
• Sorry about the color confusion. I was posting the color of the connector that the VSS is on. No question about wire colors here. If I may shift the question slightly.
  Can I share the engine speed signal between the ALH ECU input and the ABA instrument cluster? Both need this signal. In my professional instrumentation experience I have found these type magnetic proximity sensors (RPM) to be low impedence and the typical circuit input to be high impedence. This means that generaly you can apply the sensor to more than one input; in this case the ALH ECU and the ABA instrument cluster and not worry about loading the signal pulses down.  
  
  Thanks for the suggestion on the easy way to set up the glow circuit operating indicator. Sometimes I forget the KISS principle.
• #13 by MikkiJayne on 26 Nov, 2007 09:45
• Quote from: "4BTA4ME"

  
  Can I share the engine speed signal between the ALH ECU input and the ABA instrument cluster? Both need this signal. In my professional instrumentation experience I have found these type magnetic proximity sensors (RPM) to be low impedence and the typical circuit input to be high impedence. This means that generaly you can apply the sensor to more than one input; in this case the ALH ECU and the ABA instrument cluster and not worry about loading the signal pulses down.

  
  
  This is how it works in the Corrado, and on the AHU TDI    They go to a blue junction box on top of the fusebox, and the VSS drives everything - cluster, cruise control, ecu, and wing  
  
  Hth, Mikki x
• #14 by 4BTA4ME on 26 Nov, 2007 10:23
• MikkiJayne- Saw a North Carolina Corrado go this weekend on e-bay for about $2,500! There was no reserve! Thanks.
  

  Quote

  VSS drives everything

  
  That makes that problem easy to fix.
  Again. I need to have my MIL off during inspection. They turn it on and off as part of the emissions test, I believe.  I'm planning on buying VAG-COM so I can test signals extensively.