Q: RPMs drop and car shakes?

asked by on

I have a 4.7L V8, when im accelerating if I hold the gas pedal down in one spot (to maintain a certain speed) my RPMs will eventually drop to around 1300 after the truck shifts and my truck will start to vibrate? If I remove the gas pedal and press it again the RPMs will kick back up to 2k then shift and accelerate like normal.

My car has 139200 miles.
My car has an automatic transmission.

Hi again Jarod. What you’re describing is often a sign of a vacuum leak, exhaust leak, fuel restriction or faulty mass air flow sensor (designed to help mix air and fuel together). To be honest, there are more than a dozen possible mechanical components that can cause this issue, even a worn out torque converter. It’s also possible that the coolant leaking from your engine (as indicated in your last question) is causing an electrical problem with ignition timing components or even fuel-related sensors. There are simply too many possible sources to give you some solid repair advice in this case. An onsite inspection from a professional mechanic is best.

Was this answer helpful?
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. RPMs drop and car shakes?

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: Timing kit squealing after new one was installed

It sounds like something might have been misaligned or not installed correctly during the previous service. I would recommend retracing your steps to see if any steps were not done properly or if any steps were missed. I would go...

Q: Q: Heater not blowing hot air

If you have fluid leaking from under the dash on the passenger side, the heater core is leaking. This part will require replacement in order to get heat to function properly again. Sometimes this can be replaced by removing only...

Q: We put a new camshaft sensor on my 2004 dodge stratus sxt. Now the car stalls. What could cause this?

Check to see if any OBD-II trouble codes have set as if they have, they will be important clues to what is going on. Stalling has many causes apart from a faulty camshaft position sensor or faulty camshaft position sensor...

Related articles

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...
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...