We have tuned a Peugeot 208 GTi to around 225 whp on Dyno. It runs on Valvetronic so the car doesn't use throttle body, but valve lift to control the air flow. The issue is ECU pull timing at WOT.

The car is a little different from older turbocharged engine. It has some sort of spool up program, that means every time I increase the throttle input, ECU will set the absolute throttle position to 85% and retard timing to 6 - 10 degrees to spool up the turbo. The time it stay in this stage depends on how much torque you require from your actual throttle input. After a brief moment, the ECU will set the throttle to whatever needed to stay at that torque output and spark timing will be set back to normal, i.e. 10 - 30 degrees.

The problem is that spark timing get stuck at 6 - 10 degrees if I push the throttle too much or simply floor it, it will stay there until cutoff. But if I adjust my actual throttle input, it is possible to have the ECU set the absolute throttle position to 85% but spark timing advance back to normal.

Could that be a combination of torque requests, limiters, engine workload demand that cause this? Or we're simply missing specific maps control spool up throttle and timing?

Any advice on this?

some thime you have retard from knock control did you do log to see, if itsnt retard by knock control colud be by torque monitor, when you get more torque than demand you will get torque monitor action and thats wil do retard and close youre throttle position, upload youre ori and mode maybe i can helpyou