52 replies to this topic

[mbes2]

Vacuum leak test complete with no signs of a leak with up to 30psi. Next suspect is mapping to be re checked..

[Nev]

Vacuum leak test complete with no signs of a leak with up to 30psi.

Just to stop confusion in other people's minds, you performed a boost pipe leak test with positive pressure (not a vacuum leak test)

Edited by Nev, 24 July 2015 - 06:32 AM.

[mbes2]

 

Vacuum leak test complete with no signs of a leak with up to 30psi.

Just to stop confusion in other people's minds, you performed a boost pipe leak test with positive pressure (not the vacuum leak test) It's important to use the correct words !

 

 

Just what Nev said... lol 

 

Going to remove the lambda sensors today to check their condition 

[siztenboots]

check your clutch pedal switch is only activeated when pedal is pushed down , I can only think its got knocked and ECU thinks you have pedal pushed which would trigger the turbo recirc valve

[mbes2]

check your clutch pedal switch is only activeated when pedal is pushed down , I can only think its got knocked and ECU thinks you have pedal pushed which would trigger the turbo recirc valve

 

Physical check you mean ? at back of pedal mec ?

 

Just removed the rear lambda ... looks like this.... no idea if normal as nothing to compare?

 

[casino]

Plenty of advice. Sounds a little bit like what I was suffering with.

[mbes2]

Front lambda sensor removed and looks phy ok.

 

Ive got a spare MAF to try, cost of a replacement lambda from CS is £90 (ouch) 

 

Does anyone have a spare to borrow for testing ? 

 

This p0170 is a needle in a haystack issue

[mbes2]

Front lambda sensor removed and looks phy ok.

 

Ive got a spare MAF to try, cost of a replacement lambda from CS is £90 (ouch) 

 

Does anyone have a spare to borrow for testing ? 

 

This p0170 is a needle in a haystack issue

 

 

Found my OPCOM and will capture the output from that tomorrow

 

Captured at idle (MAF & 1st lambda removed)

 

Measuring blocks information:

 

Battery Voltage 13.7 V

Main Relay Active

Fuel Pump Relay Active

APP Sensor 1 (Accelerator Pedal Position) 0.98 V

APP Sensor 2 (Accelerator Pedal Position) 0.49 V

Calculated Pedal Position 0%

APP at Idle Position (Accelerator Pedal Position) Active

TP Sensor 1 (Throttle Position) 0.65 V

TP Sensor 2 (Throttle Position) 4.37 V

Calculated Throttle Position 0.16%

Throttle Position Idle

Engine Speed 919 RPM

Mass Air Flow Sensor 0.00 V

Mass Air Flow Sensor 0 kg/h

Coolant Temperature 3.53 V

Coolant Temperature 21 °C

Intake Air Temperature 3.65 V

Intake Air Temperature 18 °C

Brake Switch 1 Inactive

Brake Switch 2 Inactive

Clutch Switch Not Programmed

Vehicle Speed 0 km/h

Fuel Tank Ventilation Valve 0%

Knock Control Inactive

B1S1 O2 Sensor Heater (Bank 1 Sensor 1) Inactive

B1S1 O2 Sensor (Bank 1 Sensor 1) 451 mV

B1S1 Air/Fuel Ratio (Bank 1 Sensor 1) Lean

B1S2 O2 Sensor Heater (Bank 1 Sensor 2) Inactive

B1S2 O2 Sensor (Bank 1 Sensor 2) 451 mV

B1S2 Air/Fuel Ratio (Bank 1 Sensor 2) Lean

O2 Sensor Loop Open

B1 Long Term Fuel Trim (Bank 1) -3%

B1 Short Term Fuel Trim (Bank 1) 0%

Fan Relay 1 Inactive

Malfunction Indicator (MI) Off

Service Vehicle Soon (SVS) Indicator On

Barometric Pressure 100 kPa

Boost Pressure Command 99 kPa

Boost Pressure Command 99 kPa

Pulse Ratio Boost Pressure Solenoid Valve 0%

Auxiliary Cooling Pump Active

Turbocharger Bypass Solenoid Inactive

Engine Speed 919 RPM

Desired Idle Speed 1.175 RPM

Idle Speed Offset Cold Start

Vehicle Acceleration 0.0 m/s2

Ignition Dwell Angle 1.9 ms

Injector Time 2.6 ms

Ignition Spark Angle 30 °CA

B1 Knock Sensor Signal (Bank 1) 0.00 mV

Relative Engine Load 6%

Normal Engine Operating Temperature Inactive

ETC Limp Home Mode (Electronic Throttle Control) Inactive

Electronic Throttle Control Learn Counter 11

Fuel Tank Ventilation Valve Inactive

 

Edited by mbes2, 26 July 2015 - 02:58 PM.

[Nev]

I really don't think your lambda is suddenly out by miles. When they fail they just tend to become slowly more inaccurate I think, rather than suddenly go wildly wrong (as they are an analogue device as opposed to digital). I really think you need to get Matt to take a look at the map, I would think he still has the OEM part of the map that checks Lambda 1 vs Lambda 2. Or possibly talk to Steve (SizTenBoots) as he may know how to check/delete this aspect of the OEM map. I guess your next spend will be on a 3rd party ECU, thats when you'll realise that your existing 330 BHP when smooooothly delivered simply isn't enough, and the tuning circle will begin again !!!!!!! Good luck.

Edited by Nev, 26 July 2015 - 07:19 PM.

[Judderman]

Boost Control Solenoid, mine did a very simular thing and the BCS was buggered 

[mbes2]

Boost Control Solenoid, mine did a very simular thing and the BCS was buggered 

 

was that the front or rear one ?

[Judderman]

For me it was the one by the turbo, PTIA to get the clips off but cheap and easy to change. think these a test you can do by blowing into it (http://www.vx220.org...ntrol-solenoid/)

[mbes2]

1st lambda sensor ordered

Boost Control Solenoid ordered

 

Will replace above in the next few days hopefully.

 

 

Below attachment was captured today with the OP-COM diag software, this shows alot more details from the ECU 

 

[attachment=26381:Livedata_2003 (3)_Speedster VX220_Engine__Z 20 LET_201507271617 - Copy.txt]

 

 

(Change file type to .CSV then open in Excel)

 

 

You can see something is not right in column AH  at -10 and over.

 

Anyone got any OP-com skills to help better understand the output if it gives any more clues ?

 

 

 

[mbes2]

FIXED ... Human 1 - VX 0 

 

Turns out the brand new MAF was failed, only fitted just over a month ago.

 

Swapped the sensor from a old 70mm MAF, fitted in the 80mm housing, resolved.. pulls like a train again from any rev.. 

 

ECU Fuel trims are back to normal levels.

 

Fuel Trim Bank 1 Short Term(%)

-14.84375

-15.625

-15.625

-15.625

-13.28125

-18.75

-22.65625

-22.65625

-25

-20.3125

-20.3125

 

(ECU auto adjusted)

 

3.125

3.125

0

0

0

0

0

0

0

0

0

0

0

0

0.78125

0.78125

-4.6875

-4.6875

0

0

-1.5625

0

0

0

0

0

0

0

0

0

0

0

3.125

1.5625

0

0

-11.71875

7.8125

4.6875

0

0

0

0.78125

0.78125

0

-1.5625

6.25

6.25

13.28125

6.25

6.25

7.8125

8.59375

15.625

0

0

0

7.03125

14.84375

17.1875

17.1875

21.09375

19.53125

20.3125

20.3125

10.15625

12.5

0

0

0

3.125

-3.125

-11.71875

-11.71875

0

-0.78125

0

0

0

0

0

0

0

0

0

0

-4.6875

0

0

0

3.125

7.03125

3.125

1.5625

1.5625

-7.8125

-17.96875

-11.71875

-11.71875

-10.9375

-5.46875

-10.15625

-10.15625

-8.59375

-6.25

-6.25

0

0

0

0

0

0

-1.5625

-3.90625

-6.25

-6.25

-8.59375

-10.9375

-13.28125

-14.84375

-14.84375

-14.84375

-17.1875

-10.9375

-13.28125

-13.28125

-21.09375

-22.65625

0.78125

0.78125

0

1.5625

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

7.8125

-10.15625

1.5625

1.5625

1.5625

0.78125

0

5.46875

5.46875

0

0

0

0

0

0

0

0

0

0

0

5.46875

3.90625

1.5625

-0.78125

-0.78125

-3.125

-6.25

-7.8125

-7.8125

-10.15625

-10.15625

-10.15625

-10.15625

-10.15625

-10.9375

-8.59375

-8.59375

-9.375

-9.375

-10.9375

-10.9375

-10.9375

-11.71875

-9.375

-9.375

-10.15625

-9.375

-9.375

-9.375

0

0

-0.78125

0.78125

0.78125

-9.375

-2.34375

17.1875

17.1875

12.5

1.5625

0

0

0

0

0

0

0

0

-4.6875

-4.6875

-14.0625

2.34375

0.78125

0.78125

0

3.125

0

0

0

0.78125

0

7.8125

7.8125

0

0

-3.90625

-3.90625

5.46875

6.25

-1.5625

-1.5625

0

0

0

0

0

0

1.5625

-5.46875

-5.46875

-0.78125

0

0

0

0

0

0

0

0

7.03125

-1.5625

-1.5625

0

0

0

0

0

0

0

0

0

0

0

0

-14.84375

-15.625

-5.46875

0

0

0

0

0

0

-4.6875

-3.90625

-3.90625

-7.03125

-11.71875

-11.71875

-12.5

-14.84375

-13.28125

-13.28125

-11.71875

-13.28125

 

Big thanks to everyone above, love this kind of fault finding

 

Case closed.

 

 

[jim61]

Glad you sorted it but does it still flame ? 😆

[mbes2]

Glad you sorted it but does it still flame ? 😆

Bloody hope so.. can't see.. will need another Kent meet to find out lol

[mbes2]

Track day tomorrow... and the problem returns .... PITA car 

 

Back to fault finding 

 

 

 

One thing I have noticed is with the MAF disconnected car runs fine..... BUT I don't get any error codes like that... thought I should with MAF unplugged? 

 

 

[Kieran McC]

Loom of doom ?

[mbes2]

Been running with MAF disconnected the last few track days and its been fine, till the national... but that turned out to be the loose lambda sensor (1st) .. 

 

Waiting for a replacement MAF sensor to fit in to the current housing and a temp sensor which was showing volt spikes on the opcom output, along with the fans sometimes running for no reason... 

 

 

[CHILL Gone DUTCH]

Fans turning on is a sign of blowing exhaust (Lose or failing lambda )

Edited by CHILL Gone DUTCH, 12 November 2015 - 10:16 PM.