Throttle not responsive - 2005 Gilera Runner VX 125

Is the check engine light on, or yellow wrench light symbol? Hook up a professional grade scan tool an check for DTC'S - diagnostic trouble codes . No throttle response , problem with electric throttle control . Two position sensors in gas pedal assembly - two position sensors in the electronic throttle body - plus a DC motor to control throttle plate position. Other poster has no clue. Dirty throttle body would not cause no throttle response, rough or unstable idle for sure.


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You got the wrong idea here, if you want to improve fuel consumtion you cannot get better throttle response.If downgrade the carb for better fuelling then of course it will has less throttle response.More response means quicker petrol consumption.

Connect a OBD2 Code Reader and look for codes.

Put your hand at the exhaust tailpipe and you can feel if the catalytic converter is blocked up.

You most likely issue is a Throttle Body and MAF that needs cleaning, or an engine sensor that has failed/failing.
See the link

https://www.google.com/search?q=2005+trailblazer+no+throttle+response

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try using the scan tool to reset the ECM program
code p 2104 refers to throttle actuator control(TAC) system---forced idle mode ===causes ---wiring--TAC motor ---APP ensor--ECM
code p 2112 refers to throttle control actuatorTAC system---actuator stuck closed ===causes ---throttle body, throttle valve tight/ sticking
or TAC system--circuit malfunction===causes wiring short to positive ---short to ground ---throttle position sensor--- ECM

does the engine stay idling with no response to throttle movement? or does the engine cut-out when the throttle is pushed?

i'd suggest getting the cylinder compressions checked , black smoke indicates burning oil so could be piston rings , also that would explain lack of throttle response and low revs

Your throttle body solenoid has taken a dump... change it.. or have someone change it out and it should be fine.

What you replaced is the APP(accelerator pedal position) It is part of the electronic throttle control,what was truly needed is know as the TAC MOTOR. This recieves signal from the APP.The TAC is what accelerate the car.The only thing you can do other than replace the TAC,is do a TAC relearn .Turn thhe key off. wait ten seconds,Turn key on with the engine off.leave 1 minute. Turn key off start the vehicle you will hear the TAC motor setting itself.

adjust the throttle cable and it will help a lot . ZX14 comes from the factoray with too much slck in the cables. Also adjust the idle after taht

Have dealer check the computer codes - I had same problem and it required that the accelerator module be replaced - this is "drive by wire" system - no direct hookup to the throttle body.