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Code

Meaning

Comments

2

Live feed to ECU has been interrupted

Normal if ECU has been disconnected to clear old fault codes. Code 02 will clear if ignition turned off for 30 secs then on again.

3

Stored data corrupted since last trip

No useful information available. Test drive and try again.

12

Airflow meter out of range

Possible air leak or wiring fault.

14

Coolant thermistor out of range

Faulty sensor or wiring.

15

Fuel thermistor out of range

Faulty sensor or wiring.

17

Throttle sensor out of range

Sensor needs adjustment or is faulty or has wiring fault. This can cause low speed misfires

18

Throttle sensor output too high when air flow low

Large air leak between throttle butterfly and A/F meter or faulty throttle sensor or A/F meter.

19

Throttle sensor output too low when airflow high

Faulty A/F meter or throttle sensor.

21

Tune resistor out of range

Check tune resistor resistance.

23

Low fuel pressure

Blocked fuel filter or faulty pump or pressure regulator. Valid for cat cars only.

25

Misfire at full load

Faulty plugs, leads, electronic ignition unit, distributor or coil, low fuel pressure or valve or head gasket leak. See 40 and 50. Valid for cat cars only.

28

Air leak

Leak in A/F meter hoses, injector seals, inlet manifold gasket, plenum gasket, servo or crankcase vent hoses or Lambda sensors. Valid for cat cars only.

29

Checksum error

A dead ECU.

34

Fuelling fault in nearside injector bank

Injector or Lambda sensor wiring fault, faulty injectors, air leak at injector seals or inlet mainfold, blocked injectors. Valid for cat cars only.

36

Fuelling fault in offside injector bank

As above but for cylinders 2-4-6-8 only. Valid for cat cars only.

40

Misfire on nearside bank

As 25 but for cyclinders 1-3-5-7 only. Valid for cat cars only.

44

Nearside Lambda sensor out of range

Faulty or lead-poisoned sensor or sensor wiring fault. Valid for cat cars only.

45

Offside Lambda sensor out of range

As above. Valid for cat cars only.

48

Stepper motor fully open above 500 rpm or fully closed above 750 rpm

Sticking stepper valve, incorrect base idle speed adjustment, air leak on non-cat cars, incorrect stepper motor adjustment, incorrect throttle butterfly adjustment, rough running because of fuel or ignition or mechanical faults.

50

Misfire on offside bank

A 25 but for cylinders 2-4-6-8 only. Valid for cat cars only.

59

ECU unable to distinguish between faults 23 and 28

Fault occured for insufficient time for ECU to diagnose.

68

Road speed sensor output too low at medium rpm and high air flow

Possible sensor or wiring fault (will also cause wrong speedo readings on electrical speedo cars). Valid for cat cars only.

88

Power-up check

Not a fault. Sometimes displayed on first connecting test module.

ECU Fault Codes
This information is included for general interest, or for those who know how to make use of it and have access to the correct diagnostic equipment. The test module supplied to TVR dealers can detect 22 fault codes from the ECU. Data from 1997.
Note that pre-cat cars will display certain fault codes when there is no actual fault (they are noted in the list). Fault codes are stored in the ECU until its live feed is disconnected, and this must be done after a fault has been rectified otherwise the ECU will continue to ignore the supposedly faulty sensor(s).
ECU Sensor Checks
Data from January 1998
To carry out these tests you will need a multimeter and access to the back of the 40-way plug that connects the ECU harness to the ECU. Access is obtained by removing the ECU plug and rolling back the plug's shroud to expose the pin connections. Some tests require the plug to be re-connected to the ECU and some are done with it disconnected. There are a few pin numbers on the back of the plug, but in case you can't make them out, the pin numbering (looking at the back of the plug with the harness coming in from the right) is thus:
  28 29 30 31 32 33 34 35 36 37 38 39 40  
 27 26 25 24 23 22 21 20 19 19 17 16 15 14
  01 02 03 04 05 06 07 08 09 10 11 12 13  
Don't blame me if tinkering about here produces a puff of smoke and a large bill!
Power Supply to ECU
ECU plug connected. Ignition off. Voltage between pin 15 and ground should be same as battery voltage and at least 10V.
Airflow Sensor
ECU plug connected. Ignition on. Should be 0.3V-0.6V between pin 35 and ground.
Coolant Sensor
ECU plug disconnected. Ignition on. Should be 2400-2600 ohms between pins 7 and 25 when coolant at 20C, 300-400 ohms at 80C.
Fuel Temperature Sensor
ECU plug disconnected. Ignition off. Resistance as for coolant sensor but between pins 25 and 32.
Throttle Potentiometer
ECU plug disconnected. Ignition off. Should be 5000 ohms between pins 3 and 25.
ECU plug connected. Ignition on. Voltage between pin 20 and earth should swing smoothly from 0.26V-0.36V to 4.6V-5.0V as throttle is moved from fully closed to fully open.
Tune Resistor
ECU plug disconnected. Ignition off. Resistance between pins 5 and 27 should be 446-494 ohms on non-cat cars (green wire resistor), and 2700-4100 ohms for cat cars (white wire resistor).
Injectors and Lambda Sensors
Injectors for cylinders 1-3-5-7 should be connected to pin 13 via yellow and blue wires.
Injectors for 2-4-6-8 should be connected to pin 11 via yellow and white wires.
Lambda sensor for 1-3-5-7 should be connected to pin 23 via a blue wire.
Lambda sensor for 2-4-6-8 should be connected to pin 24 via a blue wire.
ECU plug disconnected. Ignition off. Resistance between pins 2 and 13 and between 2 and 11 should be 4-5 ohms.
ECU plug connected. Ignition off. 12V between sensor earth connections and ground.
Engine running at 1000 rpm. Fluctuating 0.5-1.0V between pins 4 and 23 (sensor for 1-3-5-7) and between pins 4 and 24 (sensor for 2-4-6-8). Low voltage indicates faulty sensor or air leak, low fuel pressure or faulty injectors. Steady 1.0V indicates faulty sensor or high fuel pressure, leaking injectors or saturated carbon canister.
Stepper Motor
ECU plug disconnected. Ignition off. Should be 48-58 ohms between pins 1 and 26 and 48-58 ohms between pins 28 and 29.
Road Speed Sensor
ECU plug disconnected. Ignition on. Should be either a fluctuating voltage from 0 and 12V or from 0.5 and 5V between pin 6 and ground when car is rolled forward slowly (depends on type of sensor fitted).

 

400

400HC

4.3

4.5BV

500HC

Capacity

3950

3950

4280

4441

4988

Bore mm

94

94

94

94

94

Stroke mm

71

71

77

80

90

Max rpm

6250 (1)

6250 (1)

0

6250 (6)

6000 (1)

BHP

240 (1&2) @ 5250 (2)

275

280 @ 5500 (2)

310 (6)

325@5500 (2)

Torque ft.lbs

270 (1&2) @ 4000 (2)

305 (1) @ 4000 (2)

305@4000 (2)

328 (6)

350(1&2)

CR

9.5:1 9.8:1 (1&2)

9.5:1 9.8:1 (1)

9.5:1 10:1 (2)

9.5:1 10:1 (1)

9.6:1

Crankshaft

0

0

TVR

TVR

TVR

Conrods

0

0

Land Rover balanced

Land Rover balanced

TVR

Pistons

0

0

TVR spec

TVR spec

TVR spec

Flywheel

0

0

TVR

TVR

TVR ribbed lightweight

Clutch

0

0

AP racing

AP racing

AP racing TVR 500

Crank Assy

0

0

Fully balanced

Fully balanced

Fully balanced

Camshaft

TVR 51

TVR 435R/M

TVR 214

TVR 234

TVR 435R/M

Cam drive

0

duplex

duplex

duplex

duplex

Cylinder heads

Balanced & polished

Balanced & polished

Ported balanced & polished

Ported balanced & polished

Ported balanced & polished

Inlet valves

0

0

4.3 Vitesse (BV as 4.5)

42.8mm Tuftrided SS

42.8mm Tuftrided SS

Exhaust valves

0

0

4.3 Vitesse (BV as 4.5)

36.8mm Tuftrided SS

36.8mm Tuftrided SS

Valve springs

TVR racing double

TVR racing double

TVR racing double

TVR racing double

TVR racing double

Inlet trumpets

0

0

0

0

TVR 44mm

Inlet manifold

0

0

Ported & polished

Ported & polished

Ported & polished 44mm

Ign timing (5)

32 deg

32 deg

32 deg

30 deg

28 deg

 

400

400HC

4.3

4.5BV

500HC

Engine specifications
The table below is was published in 1996 and, although the author’s caveat was that he could not promise it was correct, it stood the test of time. I too cannot vouch for it accuracy. If you know better, please let me know. The original source was TVR Power.
Notes:
A zero entry implies standard Range Rover spec, although this is not stated explicitly in the TVR spec sheets.
1 Figure from 'TVR' customer magazine No. 1 Summer 1995.
2 Figure from 'TVRs Volume 2' by Graham Robson 1993. Thus may refer to earlier specs.
3 Crank assemblies balanced (where shown) to Gas Turbine Spec G 2.5 ISO 1940 or 14g per Kg rotor weight @ 6000 rpm.
4 Camshaft drive (where shown) has vernier adjustable sprockets and duplex racing chain.
5 Ignition timing at 3750 rpm with vacuum advance disconnected. May have changed since model started production to accommodate reducing octane rating of pump petrol.
6 4.5BV maximum rpm, BHP and torque provided by Steve Beresford.
These torque wrench settings are for the Rover V8 engine as given by the Land/Range Rover workshop manual. I am told they are ‘generally applicable’, whatever that means. If you have a later RV8 from TVR Power I would suggest that head bolt sequence tightening is checked with them.
The table below is to be used when there is no specific torque notified in the table on the left.
The alloy used in the construction of the RV8 engine is quite soft. Ignore these torque settings at your peril.

 

Nm

lb.ft

See

Crankshaft pulley bolt

270

200

 

Camshaft gear bolt

50

37

 

Camshaft thrust plate bolts

25

18

 

Rocker cover bolts

 

 

Note 1

Stage 1

4

3

 

Stage 2

8

6

 

Stage 3 - loosen and re-torque to:

8

6

 

Rocker shaft to cylinder head bolts

38

28

 

Cylinder head bolts

 

 

Note 1 & 2

Stage 1

20

15

 

Stage 2

Then 90 degrees

 

Stage 3

Further 90 degrees

 

Lifting eye to cylinder head bolts

40

30

 

Connecting rod bolts:

 

 

 

Stage 1

20

15

 

Stage 2

Further 80 degrees

 

Main bearing cap bolts - Nos. 1 to 8

 

 

Note 1

Stage 1 - initial torque

13.5

10

 

Stage 2 - final torque

72

53

 

Rear main bearing cap bolts - Nos. 9 and 10

 

 

Note 1

Stage 1 - initial torque

13.5

10

 

Stage 2 - final torque

92

68

 

Main bearing cap side bolts - Nos. 11 to 20

 

 

Note 1

Stage 1 - initial torque

13.5

10

 

Stage 2 - final torque

45

33

 

Flywheel bolts

80

59

 

Drive plate assembly bolts

45

33

 

Drive plate hub aligner to crankshaft socket head cap screws

85

63

 

Oil sump drain plug

45

33

 

Oil sump nuts and bolts

23

17

Note 1

Oil pump cover plate screws

4

3

Note 3

Oil pump cover plate bolt

8

6

Note 3

Spark plugs .

20

15

 

Timing cover/coolant pump to cylinder block bolts

22

16

 

Oil pick-up pipe to oil pump bolts

8

6

 

Oil pick-up pipe nut

24

18

 

Knock sensors to cylinder block

16

12

 

Camshaft sensor to timing cover bolt

8

6

 

Crankshaft position sensor bolts

6

4

 

Oil cooler connections

15

11

 

 

 

 

 

Note 1: Tighten in sequence

Note 2: Lightly oil threads prior to assembly

Note 3: Coat threads with Loctite 222 prior to assembly

 

Nm

lb.ft

M5

4

3

M6

6

4

M8

18

13

M10

35

26

M12

65

48

M14

80

59

M16

130

96

1/4 UNC/UNF

9

7

5/16 UNC and UNF

25

18

3/8 UNC and UNF

40

30

7/16 UNC and UNF

75

55

1/ 2 UNC and UNF

90

66

5/8 UNC and UNF

135

100

Torque settings
Engine torque settings
Thanks to Richard Constable for letting me use this data which he obtained from Iain Jones.
One thing worth noting the torques only apply to the UNF threads, if a bolt with a UNC is used the torque will have to vary to get the same stretch on the bolt to ensure there is sufficient load on the thread so the nut doesn't come undone.
Chassis nut and bolt sizes and torque wrench settings

Component

ft lbs

Nm

Caliper to front upright

43

50

Track rod end to upright

30

40

Bottom balljoint to upright

60

81

Top balljoint to upright

60

81

Upper balljoint adapter pinch bolt

59

80

Top front wishbone to balljoint HSG

35

47

Bottom wishbone to balljoint HSG

12-15

16

Steering rack mountings

12-15

16

Steering UJ clamp bolts

12-15

16

Front & rear hub retaining nuts

229

310

Rear caliper to bearing carrier

40

54

Rear bearing carrier to upright

45

61

Differential front allen bolts

90

122-136*

Differential bushes to chassis

48

65

Rear diff carrier to diff (cap Hd)

33

45

Top rear diff bush pinch bolt

45

61

All front wishbones to chassis

45

61

All rear wishbones to chassis

45

61-65#

All rear wishbones to upright

45

61

All damper bolts

55

75

Roll bar mounting clamp to chassis

30

40

Drive shaft bolts to diff

32

38

Drive shaft bolts to axle shafts

32

38

Seat belt anchorage bolts

25

34

Wheel nuts

73

99

Brake master cyl to servo

15

20

Front crossmember

45

61

Gearbox crossmember

45

61

Chassis torque settings
Easy to read torque wrench settings from another source.
Location
Bolt length
Thread
Bolt head
Nut Head
Torque
 Bracket to Front Upright
      30mm
      M10
   8mm Hex
0
  43 - 44lbft
 Caliper to Bracket
      30mm
      M10
   8mm Hex
0
 Front Shock Lower
      3"
     1/2  UNF
 3/4"  19mm
 5/8 "  16 mm
  55 - 60lbft
 Front Shock Upper
      3"
     1/2  UNF
 3/4"  19mm
 5/8 "  16 mm
  55 - 60lbft
 Front Wishbone Lower Front
      3"
    7/16 UNF
 5/8 "  16 mm
 5/8 "  16 mm
  45 - 50lbft
 Front Wishbone Lower Outer
      70mm
     M8
     13mm
     13mm
  12 -  15lbft
 Front Wishbone Lower Rear
      5"
    7/16 UNF
 5/8 "  16 mm
 3/4 "  19 mm
  45 - 50lbft
 Front Wishbone Upper Front
      3"
    7/16 UNF
 5/8 "  16 mm
 5/8 "  16 mm
  45 - 50lbft  
 Front Wishbone Upper Outer
      3"
    7/16 UNF
 5/8 "  16 mm
 5/8 "  16 mm
  35 - 40lbft
 Front Wishbone Upper Rear
      3"
    7/16 UNF
 5/8 "  16 mm
 5/8 "  16 mm
  45 - 50lbft
 Lower Ball Joint to Upright
     0
    0
   0
    22mm
  60 - 65lbft
 Rear Bearing Carrier to Upright
      35mm
      M10
    8mm Hex
0
  45 - 48lbft
 Rear Shock Lower
      3 1/2"
      1/2  UNF
    19mm
      19mm
  55 - 60lbft
 Rear Wishbone Lower Front
      5"
     7/16 UNF
 5/8 "  16 mm
      19mm
  45 - 50lbft
 Rear Wishbone Lower Outer
      3 1/2"
     7/16 UNF
 5/8 "  16 mm
 5/8 "  16 mm
  45 - 50lbft
 Rear Wishbone Lower Rear
      3"
     7/16 UNF
 5/8 "  16 mm
 5/8 "  16 mm
  45 - 50lbft
 Rear Wishbone Upper Front
      4 1/2"
      1/2  UNF
      19mm
      19mm
  55 - 60lbft
 Rear Wishbone upper Outer
      3"
     7/16 UNF
 5/8 "  16 mm
 5/8 "  16 mm
  45 - 50lbft
 Rear Wishbone Upper Rear
      3"
     7/16 UNF
 5/8 "  16 mm
 5/8 "  16 mm
  45 - 50lbft
 Toe Adjuster
0
     1/2   UNF
      19mm
  55 - 60lbft
 Track Rod End
0
0
0
     17mm
  30 - 35lbft
 Upper Ball Joint to Upright
0
0
0
    19mm
  60 - 65lbft
 Upright Pinch Bolt
      70mm
      M12
     19mm
     19mm
     60lbft