Q: My speedometer drops past 70 when I may be going only 35 mph 1989 Mercury Grand Marquis

asked by on

My speedometer drops past 70 when I'm only going about 35 mph trying to figure out what is about to go wrong before I'm caught off guard.

My car has 179569 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. My speedometer drops past 70 when I may be going only 35 mph 1989 Mercury Grand Marquis

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: The car idles rough when in drive with the brake applied.

Hi there. It is quite possible that during the head gasket replacement, a fuel injector or ignition system component may have been improperly installed. It is also highly probable that the mechanic installed the old spark plugs instead of new...

Q: How long does it take to replace the control arm assembly in a Mercedes-Benz S 500?

Hi there. The time for removing and replacing a control arm on a 2000 Mercedes-Benz S500 ranges between 4 to 6 hours depending on the persons experience and if the parts come off easy or not. If you need further...

Q: Newly installed battery goes dead next day

Hello there, thank you for asking about your 1989 Dodge Ramcharger. There is the possibility of an electrical component malfunctioning and causing a parasitic drain while the vehicle is off, but a technician must perform the right tests to uncover...

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...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.