My car is not picking up speed the way it normally does and there is a popping noise that happens when I accelerate over 90 kms. There's no noise when I'm driving at low speeds and the acceleration is fine. My mechanic couldn't find the problem. I changed the wired and spark plugs in my car this week but it's still doing the same thing.

SOURCE: Car shakes really when I accelerate from any speed

i would check your motor mounts and transmission mount. sounds like one if them is going bad

SOURCE: 2004 Dodge Intrepid picks up speed very slowly...sometimes

you need your throttle positioning sensor replaced and set.

SOURCE: car won't pick up speed on acceleration

You're not getting enough fuel. You should check your fuel pressure. If you have enough fuel pressure, your injectors are probably clogged up. Run a lot of fuel cleaner through your tank when you put gas in and see if it makes any difference. Lucas fuel treatment is the best to use.

Udesh Ganepola

• 98 Answers
• Posted on Jun 01, 2009

SOURCE: Backfires in manifold on motor on acceleration. runs ok low speeds

Nornally reson for backfire is when intake Valve open Internal combustion in Cylinder. Pls Check Your Ignition Timing & Valve Timing. ( I think Your Timing Advancer is Defect )

SOURCE: 2003 Neon sputters at speed

Idle air control motor,or mass air flow sensor.