VL Walkinshaw Build Electronic Issues

['quipt4it]

Before your last post I was thinking to ask if you've set the timing in diagnostic mode. Normally it would be set at 10 degrees, however with cam, you might want to try 2-4 degrees more. Have you checked it? Other than that, I can't think why it would be OK in this mode.

[Nzer]

Before your last post I was thinking to ask if you've set the timing in diagnostic mode. Normally it would be set at 10 degrees, however with cam, you might want to try 2-4 degrees more. Have you checked it? Other than that, I can't think why it would be OK in this mode.

Yea I’ve tried it at 12 & 14 degrees also. It was slightly better but not what it should be.

['quipt4it]

Is the IAC operating in diagnostic mode.
I wonder what would happen if you disconnected the IAC then started it. You said the throttle blade was open a fair bit. It may be enough to keep it running.
Your exhaust must be fairly loud if you said it was too late to start
Never stopped me

['quipt4it]

Here is a diagnostic test for IAC valve
Also check that the IAC port is connected to the atmospheric side of the butterfly
I shrunk the files, let me know if they are legible
Also, I tried to get the sheen from flash in the less important part of the text.
Pay particular attention to step 4 in a3.550.jpg (bottom pic)

[Nzer]

Is the IAC operating in diagnostic mode.
I wonder what would happen if you disconnected the IAC then started it. You said the throttle blade was open a fair bit. It may be enough to keep it running.
Your exhaust must be fairly loud if you said it was too late to start
Never stopped me

With the IAC unplugged the idle is high. That’s with both TB’s completely closed. I’ll get a video of it.

Yea it’s pretty reasonable and the garage is attached to the house. 9pm start ups I’m being a bit of an arsehole Dad.

[Nzer]

Here is a diagnostic test for IAC valve
Also check that the IAC port is connected to the atmospheric side of the butterfly
I shrunk the files, let me know if they are legible
Also, I tried to get the sheen from flash in the less important part of the text.
Pay particular attention to step 4 in a3.550.jpg (bottom pic)

I’ll go through these all. I’ve got a 3w test light. Just need to check it going to be ok to probe with without causing damage to the ecu.

IAC hose goes directly to the air box as per factory. So it can draw air through the panel air filter.

['quipt4it]

Maybe do the IAC reset 1st.
The manual says, "When the ECM decides to reset the IAC, the actual reset procedure takes place when the engine RPM first goes above 2000, after the ignition has been "off" for at least 10 seconds."
Also, on the 'lean exhaust condition', code 44, quote ," A MAP sensor output that causes the ECM to interpret a lower than normal manifold pressure (low engine load) will cause the system to go lean. "
It also stresses the importance of all engine earths to be present and fully secured. They are D6 02 sensor earth circuit; A12 engine earth; D10 engine earth.

[Nzer]

Maybe do the IAC reset 1st.
The manual says, "When the ECM decides to reset the IAC, the actual reset procedure takes place when the engine RPM first goes above 2000, after the ignition has been "off" for at least 10 seconds."
Also, on the 'lean exhaust condition', code 44, quote ," A MAP sensor output that causes the ECM to interpret a lower than normal manifold pressure (low engine load) will cause the system to go lean. "
It also stresses the importance of all engine earths to be present and fully secured. They are D6 02 sensor earth circuit; A12 engine earth; D10 engine earth.

Sweet. I will go through all this later today. Will definitely check the earths are secure. Pretty sure they run through into the bay with a factory terminal mount to the back of the block.

[Gampy]

Sweet. I will go through all this later today. Will definitely check the earths are secure. Pretty sure they run through into the bay with a factory terminal mount to the back of the block.

And ensure they are solid earths ... i.e. paint free connections.

[Nzer]

Sweet. I will go through all this later today. Will definitely check the earths are secure. Pretty sure they run through into the bay with a factory terminal mount to the back of the block.

And ensure they are solid earths ... i.e. paint free connections.

Will do. The back of the block hasn’t been painted from memory but will make sure.