Skip the auto shop - Our mechanics make house calls

Q: Car shakes when stopped; hesitates when accelerating - 1998 BMW 332is

asked by on

When my car is stopped, it shakes. Also, the car hesitates when I accelerate and I have to floor the accelerator pedal in order to speed up. When I was performing a tuneup on the spark plugs, there was some oil around the thread and there was a dark/burnt look on the tips. So I replaced the spark plugs, gasket, valve cover gasket, and seal. The shaking is slightly better, but not much, so all of that actually did not solve the problem. What is your advice for what will fix the shaking and hesitation problems?

A: You don't mention the Check Engine Ligh...

You don't mention the Check Engine Light being on, but if so, check trouble codes before any other diagnostic activity - usually saves time! Good call on your initial repair - oil in the spark plug well can short the spark plug, causing a "miss" from that cylinder. It's possible you have a bad ignition coil (or more), or some other problem like a blown head gasket causing one or more cylinders to misfire. A professional mechanic, like a certified technician from YourMechanic, can check for good spark, good compression, and proper fuel injection on each cylinder to isolate the problem and make repairs.

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: Would I need to replace the entire valve cover?

Hi there: Oil leaking into the spark plug wells is an indication of a fairly serious problem that should be inspected and repaired immediately. It is almost always due to a failing gasket or O-ring but can also be the...

Q: Car Hesitation Acceration

First, there are many possibilities with such a symptom, but I can make a few assumptions based on you detailed description. Primarily, it sounds as if your car has a rich running condition when it is acting up. Cold motors...

Q: Engine oil leak

Hi there: There are several oil lines, gaskets and seals near the front passenger side of the vehicle that could be causing the oil leak, including the crankshaft seal, or oil cooler lines. It's also possible that the oil that...

Related articles

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...