Skip the auto shop - Our mechanics make house calls

Q: Car shakes, idles roughly, has difficulty accelerating

asked by on

After the car sat for some time and I started it up, it was shaking quite a bit. It has difficulty accelerating and idles roughly. When I stop the car at traffic lights, the issue occasionally gets so bad that I have to restart the car. I checked to see if the air intake has any cracks but it is fine. Also, the air intake sensor looks clean and dry. What should I check next? Thanks.

You may be having problems with the high pressure injectors in one or more cylinders. The injectors tips get clogged with carbon and do not spray good when the engine is cold. The problem may be random and intermittent.

You would need to have the system checked to see if the injector is causing a code to the cylinder. If so, you will have to replace the injector and the injector across from it to complete the repair.

If you need some assistance with this, feel free to contact a certified mechanic who can diagnose your rough idle and other driving symptoms. If my suspicions are correct, the mechanic can assist you with replacing your injectors as necessary.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Ticking noise during acceleration - 1998 Chevrolet Tahoe

Hello. If the noise is intermittent like this most of the time, it is due to a failing valve lifter. When a lifter will not hold pressure then this will occur. It can also happen if there is a bad...

Q: Slow acceleration and gasping noise -1985 Chevrolet C10

Hello. There are multiple possibilities here. There could be a vacuum leak to the engine (which affects timing, mixture, etc.) all of which kick in when under a load (vs. idling). Also, check ignition timing, especially ignition advance mechanisms, for...

Q: I think my control arm is bad after a covered repair.

Hi there. I would tend to believe, if something was improperly repaired after the accident, the shaking problem would have showed up right away. There is a chance, a suspension component was damaged and overlooked at the time of repair...

Related articles

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...