Skip the auto shop - Our mechanics make house calls

Q: engine fires, but rocks violently and will stall after a few minutes of running

asked by on

I was driving on the highway going about 80 mph (no pedal to the floor) when the engine began decelerating until i could only limp the car about 15 mph. pulled off to the side of the road and fired it back up. engine lit right away, but then would stall within 2 minutes, rocking badly. i had the car checked for engine codes, but nothing came up. It feels like the engine wasn't balancing correctly when it was running. when idling before the incident the rpms weren't always steady, it would fluctuate from a steady 1000rpm to about 700rpm. the sonata had a new timing belt put on less than 30,000 miles ago as well as a new catalytic converter. i replaced one of the coil packs a few months back as well as some of the spark plugs. any idea on how i can figure out what might be the cause?

My car has 138000 miles.
My car has an automatic transmission.

The engine must be checked over by an experienced technician to determine if all cylinders are firing properly and there is adequate fuel pressure in the fuel system. Considering the recent services, the vehicle should be in tip top shape but all previous work must be checked during the diagnostic service to ensure their integrity. I’d suggest hiring one of our mobile experts to save on a tow bill, we can come to you in order to diagnose your stalling issue firsthand. Don’t risk damaging the vehicle under poor running conditions.

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
  • Home
  • Questions
  • engine fires, but rocks violently and will stall after a few minutes of running

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: Code p0101

The P0101 trouble code may keep returning if the engine computer does not see the MAF sensor input within a specified range when it is testing the MAF input. The input can be wrong if the engine has another problem...

Q: RPM issue. Car can't produce enough power. Idles low and caps at low RPM.

Hey there, thanks for writing in about your 2001 Nissan Sentra. It sounds like you may have a throttle position sensor issue or idle air control valve issue. If the catalytic convertor was not replaced, it could also still be...

Q: I have a 2013 hyundai elantra. today my car would not shift out of 1st gear and would not go over 20 miles per hour it was like i

It sounds like the transmission may have gone into limp mode. An electronic or mechanical issue with the transmission is telling the transmission control unit to keep the speed and shifting down. If you are the original owner of the...

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...
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...
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...