Skip the auto shop - Our mechanics make house calls

Q: Car engine races intermittently and at start.

asked by on

Most of the time when I start the car (when engine is cold) the engine races in idle and continues to have RPM's up to 3000. After a few miles the racing is intermittently. Also intermittently at stops, when the tachometer needle is supposed to be in the green zone at 0, it has rpm's of 1000. (Gasoline usage is very bad. Used to get 29 miles/gallon, now 22/23 When the engine is racing it feels like the car is controlling me instead of the other way around. Problem of self acceleration was noticed twice over the last nine years, but only 2 short instances. But lately (last 6 months) started getting worse. Last 4 tank fillings noticed excessive gasoline use. Are your mechanics now operational in my area? Walnut, CA? Last time I checked, this was not the case./ Thank you very much in advance for your reply. Sincerely, Gisela Connelly PS The escape is a hybrid.

My car has 37500 miles.
My car has an automatic transmission.

Hi there. This is a normal condition for the ECM (computer) to tell the vehicle to run harder to charge the generator battery. I recommend seeking out a professional, such as one from Your Mechanic, to diagnose the generator battery (the big battery) to see if its holding a charge.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Low oil

The most common leak area is from the drain plug or oil filter. Make sure you identify the oil as engine or transmission or coolant or power steering fluid. Check all fluid levels and keep them full. If you see...

Q: Occasionally there is a grinding noise when braking to a stop then engine stall.

Hi there. If the noise is only heard when the brakes are applied, then the rotors and pads are rubbing metal to metal. This can make a grinding noise that is heard throughout the vehicle. For the vehicle stalling at...

Q: Where is the starter located on a 2005 ford escape hybrid?

The starter is above the oil filter and opposite the A/C compressor (on the same "side" of the engine as the A/C compressor). The starter may be obscured by a splash shield that indeed must be removed to replace the...

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...
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...