No power under load while on petrol

[jay see]

Not necessarily. If the 02 sensors functioning somewhat they may not throw a code.
Mine on my 48 are buggered. Using about 30l/100km.
No code or engine light but all over the place when i read them with NDS II. Runs great on gas though.
Also check the cat converter and see if its blocked


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Was speaking to a mechanic the other day. And he said that the MAF sensor has nothing to do with the engine while running on gas wonder if the O2 sensors are the same. Exhaust is as old as the car so may have a good chance that the catalytic converter is blocked but wouldn't that also affect the performance while running on gas.