Q: car shakes badly after start when sitting briefly but is okay after sitting hours

asked by on

My son went to his apartment for lunch yesterday and after 45 mins he started it to drive back to work. It was shaking so violently that he could not drive it. He said, "feels like the engine is going to fall out". He got a Uber rider to work, then home, and started it again. It behaved normally (it had sat for hours). He drove it to AutoZone and left it running while they checked the codes, which indicated cylinder misfire and bad fuel injections (P0202 and P302). He bought a cleaning product and filled up with gas, but the car shook violently again at starting at the gas station. He waited an hour and it still shook, so got a friend to pick him up and went home. He went back this morning and car started normally and he drove it 30 minutes to allow the cleaning product to mix with fuel. He is waiting to see if this product helps, but I'm concerned.

My car has 115000 miles.
My car has an automatic transmission.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. car shakes badly after start when sitting briefly but is okay after sitting hours

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: Can't find the fuel leak detection pump

Hi there. The fuel leak detection pump is located next to the fuel tank and the frame under the vehicle. It is a small plastic item with 2 hoses attached to it. It will also have a wire harness connected...

Q: Top hose came off, replaced it, replaced coolant, now bubbling coolant and overheating vehicle

Claimed by Jeff Engstrom

Q: Car was low on oil and the engine locked up while driving.

Hi there: Oil is essential for keeping all the moving parts "moving" inside a combustion engine. When the oil level is low or pressure is low, it can cause metal parts to create excessive heat or friction. If this occurs,...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...