Q: It will shudder and sometimes die on the highway

asked by on

It starts fine and for the most part runs fine. But I can be driving down the hwy and it will shudder and sometimes just die as I'm driving. And the tach will jump all over the place. Sometimes it just comes back on, other times I have to pull over and start it. The ignition system has recently been replaced. The fuel pump and filters have been replaced. A coworker mentioned something about the intake manifold might have a leak. I'm at my wits end and could use some guidance. You know, other that a 50 cal. Through the block. All the work I mention has been done by a certified mechanic and he is at a loss for what's going on. Thank you for your time.

My car has 158000 miles.
My car has an automatic transmission.

This may be a sign of a dirty or failing mass air flow sensor. The mass air flow sensor reads the air intake as it is mixed with fuel prior to being injected into the motor. When this fails, this can cause an imbalanced air/fuel load to be supplied to the motor which results in an over fueling or under fueling situation depending on the conditions. This is will often times cause a jerking reaction as the motor starves for fuel or is overloaded with fuel resulting in a momentary flooding condition.

This may also be related to a faulty throttle position sensor. The throttle position sensor reads the position of the throttle plate inside the throttle body in relation to your foot position on the gas pedal. Based upon the inputs from the sensor reading your foot’s position on the pedal, the ECU then makes the direction to supply more or less fuel to the motor. When this sensor is not working properly, this can cause intermittent responses when pressing the gas pedal as you describe. I would suggest having a professional from YourMechanic come to you home to diagnose the shuddering concern and replace any parts that need repair.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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
  1. Home
  2. Questions
  3. It will shudder and sometimes die on the highway

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: Why does my 2013 ford fusion keep shutting off

Hello there, many different faults will cause your 2013 Ford Fusion to stall and shake. The most likely causes are the spark plugs, fuel pump, coils, wiring harness fault, vacuum leak, or oxygen sensors. This vehicle needs diagnosed fully to...

Q: Engine wants to bog out on idle

Hello. It sounds like you have an issue with your idle air control valve, weak fuel pressure, or carbon buildup blocking your throttle body. More than likely it is the idle air control valve. It is meant to regulate engine...

Q: i have a check engine light on

Hello there, thank you for asking about your 2004 Toyota Camry. Code P0012 relates to the camshaft position sensor which monitors the speed of the camshaft and relays this information to your car's computer, which helps to control ignition timing...

Related articles

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...
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...