Skip the auto shop - Our mechanics make house calls

Q: My car stalls 4 or 5 times when starting cold

asked by on

My car will stall several times when starting cold and I have to give it more gas to keep it from stalling when driving. It bogs down like it is going to die when I'm driving it before it warms up completely. Once its warmed up, it won't stall. Before it warms up, it really lags when driving down the road, and then all of a sudden it acts normal. I have a lack of power especially climbing hills. The timing has been checked and is set right. I have cleaned the IAC. There isn't a MAF sensor, but I do have a MAP sensor. Could this be a engine temperature sensor, O2 sensor, Throttle position sensor or other issue?

My car has 140000 miles.
My car has an automatic transmission.

A: Hi, thanks for your question. You should ch...

Hi, thanks for your question. You should check the MAP sensor first to see if it is reading the correct altitude for your location. Sometimes the sensor will read that you are at 10000 feet when you are at 100 feet above sea level. If the sensor is working fine, then you may either have carbon build up on the valves and need carbon cleaned from the combustion chambers using Ford induction system cleaner and following the directions on the can. Once the carbon is cleaned, check to make sure the fuel pressure is okay and filter is clean. If you are still experiencing problems, consider having an expert automotive technician from YourMechanic come to your home or office to inspect and diagnose this issue for you, and make or suggest any repairs as needed.

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: Starter keeps on turning even after my truck starts.

Hello. Thank you for your question. YourMechanic will gladly assist you in restoring your starting system to factory OEM condition and function. For safety reasons (principally your and your family's safety in operating the vehicle), we cannot repair "redesigns" such...

Q: Why is my van pulling to the right and steering wheel pointing left.

There are several possibilities, all of which would be evaluated in a suspension inspection conducted by a certified Mechanic. The simplest scenario is the wheel alignment is thrown off during the collision. From your description, of course the alignment is...

Q: I need to replace my serpentine belt, it with the power steering pump deleted. What size belt would I need? 2007 Mercury Milan

Hi there - this may or may not be possible. Bypassing the power steering pump may route the serpentine belt in conflict with other rotating components on the engine. Using a "soft measuring tape" (like a tailor uses), measure the...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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.