Skip the auto shop - Our mechanics make house calls

Q: Acceleration problems

asked by on

I've been having trouble with my Commodore lately. The car starts fine however when I touch foot on the accelrator just in park, the whole car shakes and shudders followed by a only explained as a slight rattling noise. The car will then cut out completely. I've had the RAA look at it and be pretty stumped. Got a lube mobile mechanic to have a look and he tested spark plugs leads etc. all tested ok, for him to then tell me that it's the fuel pump, however the same problem occurs on gas? Could that still be the problem? Any advice?

Hello. Most of the time this occurs from a failing throttle body. What I would be concerned with first is the noise. If it has a failing timing chain then this can occur, but that noise will also happen if the engine is stalling. If there is no engine noise prior to trying to accelerate then I would suspect a failing throttle body. Prior to changing this I would scan the computer for codes and also check the sensor inputs to see if any of them are not reading correctly. By doing this the issue should be able to be found.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Transmission making clunking and banging noises - 2005 Chevrolet Avalanche 2500 V8 Automatic

Check for problem codes - you mention that the Check Engine Light is on. This could be the torque convertor clutch not releasing as you slow down, or not locking up smoothly when you reach 40-50 mph accelerating. And yes,...

Q: I hear a bird chirping type noise (or metal-on-metal) when accelerating

Hi there. The metal-to-metal sound coming from an engine during acceleration is commonly due to low oil levels. The sound is caused by the valves or cylinder head hardware clanking due to reduced oil pressure or improper lubrication. However, there...

Q: Hesitancy

I'm wondering if your RAV4 is one that has a CVT (Continuously Variable Transmission). You haven't indicated if this is a recent change in your Toyota's behavior or if it's been like this since you got it. If it is...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.