Skip the auto shop - Our mechanics make house calls

Q: Hesitate on hard acceleration - 2002 Volkswagen Beetle

asked by on

When accelerating in to each gear car acts like it wants to go faster then bogs down. In each gear it does this. I have changed the ignition coils and spark plugs also I have changed the air filter and cleaned the mass air flow sensor. It acts like its starving for air when accelerating, but driving slow it's fine.

My car has 186000 miles.

A: Hi there. Check for exhaust restriction and...

Hi there. Check for exhaust restriction and related to that condition of the oxygen sensors (bad sensors can cause catalytic converter plugging).

Another possibility is fuel starvation so the output of the fuel pump has to be tested (pressure and volume) and the fuel filter should probably be changed in any event as preventive maintenance. Check fuel pressure before and after changing filter because in the event filter is plugged, as that will give you additional diagnostic info.

It is also possible to have plugged or malfunctioning fuel injectors. There are some tests of the fuel injectors that can be done on vehicle but it would be most helpful to check secondary voltage patterns on each cylinder on an oscilloscope. That would reveal, in detail, what is going on with the engine. Other easy to check possibilities are vacuum leaks and engine timing advance function. If you need to have this inspected, a certified professional from YourMechanic can come to your car's location to diagnose the hesitation on acceleration so that this is correctly addressed.

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・Save up to 30%

Get a quote

What others are asking

Q: car over heated

You will need to inspect your radiator to make sure it's not leaking from there and then inspect the hoses. You could have something as small as a bad thermostat or something as big as a bad water pump. I...

Q: What type of fuel am I okay using?

An 89 octane fuel should work fine, granted a 91 octane is recommended. With having a turbo engine you may have harmful effects using a lower grade fuel due to what they call pre-detonation. This can occur under higher loads...

Q: Do i need to add pag oil to my cars a/c system after the condenser is replaced.2002 Chrysler Town & Country

Hello. When replacing a part like the condenser it is a good idea to add some extra oil with the new refrigerant. Most refrigerants do have some oil in them which should be enough. The majority of the oil in...

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
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.