Ecu light coming on under hard boost Apexi PFC

[Lee H]

Got a rev 2 turbo with rev 3 conversion and Power FC. I'm running 1 bar of boost. When I hit full boost in 1st the ecu light comes on momentarily and then goes out. It doesn't do this in any other gears.

According to the commander the max knock it has recorded is 30 which is low and not reason for the light to come on.

Any ideas what could be causing this? I assume fault codes can't be read off these ecu's?

[Timsmr2]

Does just come on or does it flash and it so how many times?

Also what map sensor are you using?

[Lee H]

Just comes on for a split second till I change into 2nd.

3 flashes would be knock I believe?

Standard map sensor.

[Timsmr2]

Yep 3 flashes is knock

A single flash is usually a sensor signal error. If you goto etc > Sensor/SW check on the commander you can check the sensors if a sensor is malfunctioning then it will be highlighted (may need to have a friend watch this while you drive).

[Lee H]

Cheers for that. Will give that a try in the week.

[black gts]

hi mate
if the check engine light flash quickly then that means knock.
if it flash's slow then it means you have reached your injector limit(maxed your injectors out).

this is how mine is set up by Ryan

[Steve Horrocks]

Passenger ride then dude?! Thought of sensor check t'other night but didn't think to check whilst riding shotgun! Lol

[Nick86]

hi mate
if the check engine light flash quickly then that means knock.
if it flash's slow then it means you have reached your injector limit(maxed your injectors out).

this is how mine is set up by Ryan

knock in 1st gear? would have thought knock would be on the higher gears rather than only in 1st.

[Lee H]

Did a few test runs tonight and the ecu seems to pull the ignition when the light comes on. Injector duty is reaching 95% in first when the light comes on so reckon that's the problem. Don't seem to have any sensor faults.