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[Debs.]

Further to the pup-mobile`s ongoing idle-stalling issues; I`ve sourced a replacement (known good) ECU thermo-sender and plan on swapping it this weekend.
I know it`s located on the aft-side of the coolant-bridge, so here`s the question:

What has to come off the engine to do the job?......I`m thinking: bagpipes and the IAV, plenum w/o EGR and breather hoses, throttle plate and cable brkts......but, can I get away without removing the intake risers?


Whilst I`m at it, I intend to blank off the EGR feed to the plenum with a bit of cut-to-fit copper sheet (actually, an opened-out bit of annealed 22mm C/H pipe.).

If this doesn`t work and stop the constant stalling at junctions (and the 'bobbing' idle)......I`m all out of ideas. 

[amba]

Just undo the plenum and upturn it to rest on the coolant reservoir..saves removing throttle cable and cruise.

Only need to undo the top part of the "bagpipes " at the large jubilee clips and fold them around to face the grille.

Fuel rail comes off aswell but you should have sufficient access to the coolant bridge area without removing the bottom "sandwich" plate.May be  easier with the coolant bridge removed but would require the sensor undoing first as you would have only limited ability to get pressure on the spanner..in which case would need new doughty seals to coolant bridge.

Shouldn,t provide you with any nasty surprises as just unbolting bits and replacing again as is some many jobs on these V6,s.

[JamesV6CDX]

Plenum, inlet / inlet bridge and it's there at the back

Sorry Debs as I don't know the history, but stalling - I'm presuming you have no code 19?

[Debs.]

Plenum, inlet / inlet bridge and it's there at the back

Sorry Debs as I don't know the history, but stalling - I'm presuming you have no code 19?

Hiya James, so far:

It`s had a new (VX) crank-sensor
Replacement IAV (known good)
Replacement MAF (ditto)
New plugs/leads
Thorough clean of throttle plates/breathers and a check for any vacuum leaks.


.....and still, she stalls at most junctions and the tacho. 'bobs'.

[Marks DTM Calib]

Think I PM'd Pete on this, we need to be absolutley certain that there are no air leaks.

As for the sensor, follow the guide for changing the cam cover gaskets......

[Jimbob]

weve sprayed carb cleaner all round, no change in engine noise.....livedata snapshot follows....

[Jimbob]

heres the live data...Before some parts replaced (Maf & ICV)

Identifier   0D
Battery Voltage   13.8 V
Immobiliser Signal   Received
Immobiliser   Active
TPS Signal (Throttle Position Sensor)   0.51 V
Simulated Idle Position   Active
Simulated Full Load Switch   Inactive
Mass Air Flow Sensor   0.64 V
Mass Air Flow Sensor   10 kg/h
Coolant Temperature   1.40 V
Coolant Temperature   74 °C
Intake Air Temperature   3.08 V
Intake Air Temperature   31 °C
Engine Type   6 Cylinder
Transmission Coding   Automatic Transmission
Park/Neutral Switch   P - N  0V
A/C Information Switch (Air Conditioning)   Inactive 0V
A/C Compressor Switch (Air Conditioning)   Inactive 0V
Telltale (Check Light)   Off 12V
Fuel Pump Relay   Active 0V
Spark Angle before TDC (Top Dead Centre)   4 °CA
Ignition Coil Cyl. 1+4 (Cylinder)   Load
Ignition Coil Cyl. 2+5   Load
Ignition Coil Cyl. 3+6 (Cylinder)   Load
Knock Signal   Inactive
Knock Retard   0 °CA
Secondary Air Pump Relay   Inactive 12V
EGR Valve (Exhaust-Gas Recirculation)   Inactive
EGR Position Feedback (Exhaust Gas Recirculation)   0.68 V
Fuel Tank Ventilation Valve   0%
O2 Sensor 1   702 mV
O2 Sensor 2   537 mV
O2 Sensor Loop 1   Closed
O2 Sensor Loop 2   Closed
Air/Fuel Ratio 1   Lean
Air/Fuel Ratio 2   Rich
O2-Loop 1 Integrator   140 Steps
O2-Loop 2 Integrator   123
O2-Loop 1 BLM Idle (Block Learn Map)   198 Steps
O2-Loop 2 BLM Idle (Block Learn Map)   0 Steps
O2-Loop 1 BLM Partial Load (Block Learn Map)   116 Steps
O2-Loop 2 BLM Partial Load(Block Learn Map)   122 Steps
Hall Sensor   Active
Engine Speed Pulse   Active
Engine Speed   612 RPM
Idle Air Control   155 Steps
IAC Integrator (Idle Air Control)   126 Steps
IAC Adaptation Slope (Idle Air Control)   148 Steps
IAC Block Learn (Idle Air Control)   124 Steps
Desired Idle Air   8 kg/h
Actual Value Idle Air   8 kg/h
Desired Engine Idle Speed   600 RPM
Injection Pulse   2.9 ms
Engine Load Signal   0.9 ms
TPS Load Signal (Throttle Position Sensor)   0%
Vehicle Speed Pulse   Not Received 12V
Vehicle Speed   0 km/h
Intake Manifold Valve 1   Inactive 12V
Intake Manifold Valve 2   Inactive 12V
Torque Control   Inactive
A/C Cutoff Relay (Air Conditioning)   Inactive 12V
Diagnostic Request   Inactive 5V

[Debs.]

[Harry Hill]

"Ljay or Debs. live data......

Which is better?....Hmmmmm?

......Fight!"

[/Harry Hill]

[albitz]

Not sure if the sensor can be removed with the coolant bridge in place.access is prettyn tight for a 199mm open end spanner.
Anyone else know ? Might be best to get a set of dwty washers for the bridge before starting the job.

[amba]

Thats 1 rather big spanner you need then Albs .

From my last ventures down the back of the engine  I seem to recall space is a tad tight ...my choice would be to remove the entire bridge and disconnect the 2 water pipes.

Place bridge in a vice or suitable "holding implement"and then undo the sensor away from the car.Clean up and replace ,naturally replacing the 4 doughty washers.Sure that would be the best solution.

[RobG]

Not sure if the sensor can be removed with the coolant bridge in place.access is prettyn tight for a 199mm open end spanner.
Anyone else know ? Might be best to get a set of dwty washers for the bridge before starting the job.

Even with a "modify" button, you still can`t get it right

[Jimbob]

[Harry Hill]

"Ljay or Debs. live data......

Which is better?....Hmmmmm?

......Fight!"

[/Harry Hill]

lol I changed it to yours only for clarity...heres the one with both


LJAY 3.0     DEBS 2.5

Identifier   1D   0D
Battery Voltage   14.3 V   13.8 V
Immobiliser Signal   Received   Received
Immobiliser   Active   Active
TPS Signal (Throttle Position Sensor)   0.45 V   0.51 V
Simulated Idle Position   Active   Active
Simulated Full Load Switch   Inactive   Inactive
Mass Air Flow Sensor   1.31 V   0.64 V
Mass Air Flow Sensor   40 kg/h   10 kg/h
Coolant Temperature   3.41 V   1.40 V
Coolant Temperature   23 °C   74 °C
Intake Air Temperature   3.82 V   3.08 V
Intake Air Temperature   13 °C   31 °C
Engine Type   6 Cylinder   6 Cylinder
Transmission Coding   Manual Transmission   Automatic Transmission
Park/Neutral Switch   P - N  0V   P - N  0V
A/C Information Switch (Air Conditioning)   Active 12V   Inactive 0V
A/C Compressor Switch (Air Conditioning)   Inactive 0V   Inactive 0V
Telltale (Check Light)   Off 12V   Off 12V
Fuel Pump Relay   Active 0V   Active 0V
Spark Angle before TDC (Top Dead Centre)   -2 °CA   4 °CA
Ignition Coil Cyl. 1+4 (Cylinder)   Spark   Load
Ignition Coil Cyl. 2+5   Load   Load
Ignition Coil Cyl. 3+6 (Cylinder)   Load   Load
Knock Signal   Inactive   Inactive
Knock Retard   0 °CA   0 °CA
Secondary Air Pump Relay   Inactive 12V   Inactive 12V
EGR Valve (Exhaust-Gas Recirculation)   Inactive   Inactive
EGR Position Feedback (Exhaust Gas Recirculation)   0.76 V   0.68 V
Fuel Tank Ventilation Valve   0%   0%
O2 Sensor 1   556 mV   702 mV
O2 Sensor 2   702 mV   537 mV
O2 Sensor Loop 1   Open   Closed
O2 Sensor Loop 2   Open   Closed
Air/Fuel Ratio 1   Rich   Lean
Air/Fuel Ratio 2   Rich   Rich
O2-Loop 1 Integrator   128 Steps   140 Steps
O2-Loop 2 Integrator   128   123
O2-Loop 1 BLM Idle (Block Learn Map)   255 Steps   198 Steps
O2-Loop 2 BLM Idle (Block Learn Map)   21 Steps   0 Steps
O2-Loop 1 BLM Partial Load (Block Learn Map)   129 Steps   116 Steps
O2-Loop 2 BLM Partial Load(Block Learn Map)   129 Steps   122 Steps
Hall Sensor   Inactive   Active
Engine Speed Pulse   Active   Active
Engine Speed   1.346 RPM   612 RPM
Idle Air Control   134 Steps   155 Steps
IAC Integrator (Idle Air Control)   120 Steps   126 Steps
IAC Adaptation Slope (Idle Air Control)   122 Steps   148 Steps
IAC Block Learn (Idle Air Control)   124 Steps   124 Steps
Desired Idle Air   34 kg/h   8 kg/h
Actual Value Idle Air   33 kg/h   8 kg/h
Desired Engine Idle Speed   1.300 RPM   600 RPM
Injection Pulse   4.7 ms   2.9 ms
Engine Load Signal   1.7 ms   0.9 ms
TPS Load Signal (Throttle Position Sensor)   0%   0%
Vehicle Speed Pulse   Not Received 12V   Not Received 12V
Vehicle Speed   0 km/h   0 km/h
Intake Manifold Valve 1   Inactive 12V   Inactive 12V
Intake Manifold Valve 2   Inactive 12V   Inactive 12V
Torque Control   Inactive   Inactive
A/C Cutoff Relay (Air Conditioning)   Active 0V   Inactive 12V
Diagnostic Request   Inactive 5V   Inactive 5V

[albitz]

Not sure if the sensor can be removed with the coolant bridge in place.access is pretty tight for a 19mm open end spanner.
Anyone else know ? Might be best to get a set of dowty washers for the bridge before starting the job.

  ..............better ? 

[RobG]

Not sure if the sensor can be removed with the coolant bridge in place.access is pretty tight for a 19mm open end spanner.
Anyone else know ? Might be best to get a set of dowty washers for the bridge before starting the job.

  ..............better ? 

Capital after a "full stop"

[Debs.]

From my last ventures down the back of the engine  I seem to recall space is a tad tight ...my choice would be to remove the entire bridge and disconnect the 2 water pipes.

Yikes!

.......confidence in my ability to tackle this, is ebbing-away rapidly!