Accelerator is very slow but headache is i am unable to get higher speed above 120 km /hour its take too much time to be more speedy over 120 km/h and i am surely never got speed over 140 km/hour please help me how i can get more speed on highway ( vehicle i ust purchased)
May be low fuel pressure, or, much less likely, a bad fuel filter. Check your air filter, maybe even replace it. Check vacuum lines for leaks. Try a good fuel injection cleaner like Lucas brand. Maybe a gas line dryer (for water mixed with gas). You might have to test or have tested, your fuel injectors. Could be the throttle position sensor. MAP sensor. Choke may be sticking part way closed.
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will gradually get to desired speed but fades out when accelerator is punched
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