Does anyone know how to go about diagnosing a 3 Cylinder 1.4Tdi (75bhp Audi A2)? I am used to logging data on the 1.8T but do not know where to start on the 1.4Tdi. What is the equivalent of block 32 Idle/Multi that can be used to determine vac and boost leaks on the 1.8T? I have not logged any power runs yet but it goes OK but it is just not as economical as I thought it would be and I would like to try and run down why.

Nobody?

I can not believe there is no one out there that knows what blocks to log on a 1.4Tdi ?????

Hi, Please see label file for 1.4 tdi, boost pressure is in block 11.3 and is checked with car at

3000rpm in third gear, reading should be 1600-2200 mili bar.

;

; VAG-COM Labelfile

;

; Audi A2 (8Z) / Seat Arosa (6H) / Seat Cordoba/Ibiza (6L)

; VW Lupo (6X) / VW Polo (6N) / VW Polo (9N)

;

; Component: Engine (#01) - AMF/ANY/AYZ

;

; P/N: 045-9??-019-???

;

; includes measuring blocks

;

; This file is part of a redirection package,

; make sure you have all of the following files.

;

; 04-01.LBL

; 045-906-019-AMF.LBL (1.xl TDI @ 61/75 HP - AMF/ANY/AYZ)

;

; UNTESTED

;

;*****SOME MEASURING BLOCKS ARE READ AT WIDE OPEN THROTTLE (WOT) AND INDICATED AS SUCH*******

;

; contributed by Mike Sauve www.alientech.net

; modified for 3 cyl 1.2 /1.4 TDI engine by Eric Maurier

; specified values format: 1.2//1.4; if only one value, same for both displacements

;

; last modification: 15/Oct/2005

;

; requires VAG-COM 405.0 or newer

;

;

;---------------------------------------------------

;

; measuring block informations

;

;---------------------------------------------------

;

;

;Measuring block 000 data at idle,

;0,1-Engine Speed ;26...44(800-920 rpm)//41..45(860-940 rpm)

;0,2-Start of Injection ;114...104(4*BTDC-7*BTDC) up to number Y_015006

; 126...116(0*BTDC-3*BTDC) from number Y_015007

; //117...97(3*BTDC-9*BTDC)

;0,3-Trottle Position ;0(0%)

;0,4-Injection Quantity ;11...29(3-8.0 mg/stroke)//11...33(3.0-9.0 mg/stroke)

;0,5-Manifold Absolute Press.;88...108 (900-1100 mbar)

;0,6-Atmospheric Pressure ;181...222 (900-1100 mbar)

;0,7-Engine Coolant Temp. ;80...36(80-110*C)

;0,8-Intake Manifold Temp. ;190...51(5-100*C)

;0,9-Fuel Temperature ;85-178(20-85*C)

;0,10-Air Mass(EGR on) ;54-87(180-290 mg/H)//60-96(200-320 mg/H)

;EGR is switched off after approx. 2 min. of idle (>2min, restart eng. or give full throttle)

;Measuring block 000 data at full load, 3rd gear, temp 80*C, at 3000 rpm,

;0,1-Engine Speed ;134...154(2800-3200 rpm)

;0,2-Start of Injection ;79...56(15-22* BTDC)

;0,3-Throttle Position ;255(100%)

;0,4-Injection Quantity ;156...175(43-48 mg/stroke)

;0,5-Manifold Absolute Press.;177...216(1800-2200 mbar)

;0,6-Atmospheric Pressure ;181...222(910-1110 mbar)

;0,7-Engine Coolant Temp. ;80...36(80-110*C)

;0,8-Intake Air Temp. ;190...51(5-100*C)

;0,9-Fuel Temperature ;85...178(20-85*C)

;0,10,Air Mass ;>180//210(>600//700 mg/H)

1,0,Injected Quantity (see label file for #1)

1,1,Engine speed

;800-920//860-940 rpm

1,2,Inj. Quantity,3.0-9.0 mg/H

1,3,Inj. period spec.,3...7*CA

1,4,Coolant Temp.,80-110*C

2,0,Idling Speed (See label file for #1&3)

2,1,Engine speed

;800-920 rpm//860-940 rpm

2,2,Throttle Position,0%

2,3,Operating Cond/AC,speed/throttle/AC

;xxx

; 1 AC compressor switched on

; 1 Idling switch closed

;1 Inc. idle speed as AC switched on

2,4,Coolant Temp,80-110*C

3,0,EGR (see label file for #1)

3,1,Engine speed

;800-920 rpm//860-940 rpm

3,2,MAF (specified),200-300 mg/H

3,3,MAF (actual),180-320 mg/H

3,4,EGR duty cycle,30-80%

4,0,Unit inj. valve activation (label file for #1&2)

4,1,Engine speed

;800-920 rpm//860-940 rpm

4,2,Specified start

;4-7/0-3*BTDC//3..9*BTDC

;4..7*BTDC up to vehicle number Y_015006

;0..3*BTDC from vehicle number Y_015007

4,3,Specified period,4..7*CA

4,4,Cold Start Valve,3-80%

;Group 4 @ full throttle

;4,1 2800...3200 rpm,

;4,2 15...22*BTDC,

;4,3 15...24*CA,

:4,4 -3...+3*CA

5,0,Starting Conditions

5,1,Engine speed,rpm

5,2,Start Inj Qty,

5,3,Starting synchro.,

5,4,Coolant temp,*C

6,0,Switch Positions (See label file for #2, #4)

6,1,Speed, km/h

6,2,Brake Pedal,F/F47/F36

; xxx

; 1 Brake light switch F closed

; 1 Cruise,DFI brake switch open

; 1 Clutch vacuum vent valve switch-f36-, open

6,3,Throttle position, %

6,4,Cruise System,

;0 = vehicle with cc system, cc off

;1 = vehicle with cc system, cc on

;255 = vehicle without cc system

7,0,Temperatures

7,1,Fuel Temp,~Amb.Temp.*C

;-5.4*C short circuit or Fuel Temp. Sensor -G81- inoperative

7,2,Fuel cooling status, off

7,3,Intake Man. Temp,~Amb.Temp.*C

;~136.8*C Intake Manifold Temp. Sens0r -G72- inoperative

7,4,Coolant Temp,~Amb.Temp.*C

;Short circuit or ECT sensor -G62- inoperative

8,0,Injection Quantity Limitation **Done at WOT**(See label file, I.Q.= Inj. Qty.)

;Read values when engine speed reaches 3000 rpm.

8,1,Engine speed,2800..3200 rpm

8,2,I.Q. Driver's req.,45-50//60-69 mg/H

8,3,I.Q. via rpm(Torq),31-34//43-48 mg/H

8,4,I.Q. via air mass,30-39//46-55 mg/H

;#4 injection quantity limited due to air mass drawn in (smoke prevention)

9,0,Injected Quantity Limitation

9,1,Engine speed,rpm

9,2,Injection Quantity,CC active

9,3,

9,4,Quantity limitation,

10,0,Air system WOT in 3rd 3000rpm

10,1,MAF Sensor, >600//700 mg/H

10,2,Atmos. Pressure, 900..1100 mbar

10,3,Manifold Pressure,1650..2200 mbar

10,4,Throttle,100 %Throttle

11,0,Charge Pressure Control WOT in 3rd 3000rpm

11,1,Engine speed, 2800...3200rpm

11,2,Specified MAP,1650-2200 mbar

11,3,Actual MAP,1650-2200 mbar

11,4,D.cycle MAP v.,40-95%

12,0,Glow Plugs (see label file for #1)

12,1,Glow status,all 1's=off

; xxxxxxxx

; 11111111 Glowing off

; 00010000 Pre-glow

; 01110000 Start of glow

; 11110000 Interim glow

; 10110000 Post-glow

; 00110000 Readiness glowing

12,2,Pre-glow period,

12,3,Supply Voltage,

12,4,Coolant Temp,*C

13,0, Idle Speed Smooth Running Control

13,1,Cyl 1,+- 1.9//2.8

13,2,Cyl 1,+- 1.9//2.8

13,3,Cyl 1,+- 1.9//2.8

13,4,

15,0,Fuel Consumption

15,1,Engine speed,rpm

15,2,Inj Qty (actual),

15,3,Fuel Consumption,

15,4,Inj Qty requested,(accelerator)

16,0,Additional Heater

16,1,Generator loading,

16,2,Aux. heat,(see label file)

; xxxxxxxx

; 1 Not relevant

; 1 Not relevant

; 1 Coolant Temp. sensor G62 or Intake Air Temp. sensor G72 faulty

; 1 Engine start in last 10 seconds

; 1 Engine below 760 rpm

; 1 Battery below 9 volts

; 1 Generator faulty

; 1 Coolant temp > 70-80C or Intake Air Temp. > 5C

16,3,Activation,Hi/Lo

; xx

; 1 High heat output,J360 on

; 1 Low heat output,J359 on

16,4,Voltage supply,from ECM

18,0,Unit injector valve status

18,1,Cyl1 injector valve,0

18,2,Cyl2 injector valve,0

18,3,Cyl3 injector valve,0

18,4,

;

; End of file

Regards

Tony

Some good info there

I know I could run a full throttle run to check requested vs actual to see boost leak but I know that the block 32 test on the 1.8T provides really good indication of vac/boost condition and I wonder if there is a similar block on the TDI?

Log channel 11 for boost