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Originally Posted by Nahkapohjola
...also fuel filter?
Fuel pressure, MAF Mass AirFlow, TPS Throttle Pos sensor and Heated O2 sensors may be individually tested and verified up to a point. First check charge voltage and correct if necessary [bad alt = voltage spikes can be found out if alt cables are disconnected for tsting].
Bad Knock Sensor retards ignition, my ECU did not report that. Causes universal pwr loss [no hesitation].
MAF and TPS can also be cleaned instead/before replacement. Some links on page http://www.cardomain.com/ride/748507/9 ...also see 'Favorite Links'; theres 'some' reading...
My Spanish is worse than your english  ...how's your Finnish?
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thanks for the reply, i think ther is no fuel filter in this model, but i cleaned the filter in the gas pump inside the tank. i'll check the TPS and MAF sensors, thanks...