Skip the auto shop - Our mechanics make house calls

Q: When I press the gas the car does not accelerate but instead makes a high rev noise.

asked by on

When I attempt to press the gas the car will not accelerate but instead makes a high rev noise. The odd thing is if I stop pressing the gas, when it is revving high the RPM's drop and then I quickly press the gas again and the car jerks forward as if something that needs to be caught it catching? The only error code on the ODB is PO306-Cylinder 6 misfire. I've changed ignition coil, spark plugs and wires. What is the problem?

My car has 102000 miles.
My car has an automatic transmission.

A: Hello. If the car is in "Drive" a...

Hello. If the car is in "Drive" and you attempt to accelerate from a standing start and yet the car does not move forward, you have a problem with the transmission (perhaps the linkages) and/or torque converter. The misfire code might be simply a coincidental issue because even if the engine is running "roughly" (i.e., misfiring) if you are in "Drive" the car will move. Your best bet is to have a certified technician, like one from YourMechanic, come to your home or office to diagnose the acceleration problem and advise you on repairs. It doesn't sound like an "intermittent" problem at this point, so it should be fairly easy to discover what the issues are.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Don't understand CEL Codes.

The codes P0300 through P0306 are for misfires of random cylinders or different cylinders. The second code P1456 is for the evaporative fuel tank system having a leak somewhere in the system. Since you are getting random misfires, then I...

Q: Speedometer not working

Hello there, you are correct. Both of the codes on your 2001 Hyundai Elantra can relate to the speedometer. The P0720 code is for output speed sensor circuit fault, this can be caused by a faulty speed sensor, a wiring...

Q: engine misfire on running temperature

This sounds like you may have potentially two unrelated problems. The first may be related to the issue of timing causing the misfiring, and the second could be related to the fan running more than usual. First, the misfiring...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...