Speed slower

[Abu sayem]

I have faced speed slower problem of toyota allion 2014. When ac system off and without acceleration this vehicle speed very slower. Please suggest me.

[HaeylM]

16 hours ago, Abu sayem said:

I have faced speed slower problem of toyota allion 2014. When ac system off and without acceleration this vehicle speed very slower. Please suggest me.

im not sure about what ur question is exactly but if your car is idling irregularly then try and get a tuneup, clean the throttle body and check your grounding. 

If you are getting sluggish acceleration even under lower load you might want to check if you are getting white or darker smoke of any kind from the silencer to ensure you arent running a leaking gasket. If you are in the clear, test your sensors and fuel lines.