Skip the auto shop - Our mechanics make house calls

Q: stalls when braking/turning

asked by on

I have a 2003 Dodge Ram 1500 slt 4.7. I bought this truck not running and the only thing the previous owner said they replaced that I haven't checked is the fuel pump. I have replaced head gaskets,crank sensor,cam sensor,tps,iac,alternator,battery,cleaned the throttle body thoroughly,all new lifters,changed the old power steering pressure line to one that could hold a power steering pressure switch,ran half a bottle of seafoam direct into the fuel injectors and half in the tank because four were dirty,new spark plugs and coils all around, I've checked the wires under the fuse box to check for weak points also sprayed all the connectors with electronic cleaner to get out dirt.General problem that I am seeing at the moment is braking during a 90 degree turn stalls the truck.I have been able to come to a stop at stop sign and be fine, and I can make successful turns if I throttle through them, but like parking lots where I have to use the brake while turning the truck stalls.

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

You have definitely thrown a lot of parts at the truck. Some may have been necessary, but some may not have been.

Based on your current symptoms, it sounds like the Manifold Absolute Pressure, or MAP sensor, may be to blame. When you are braking, you are using engine vacuum to assist your braking efforts via the power brake booster.

The MAP sensors function is to adjust fuel ratios and engine speed based on engine vacuum pressures. A faulty map sensor could allow the engines computer to incorrectly adjust itself based on the false reading it may be receiving from the MAP sensor.

I recommend having a qualified technician, such as one from YourMechanic, perform an inspection of your stalling issue to identify which sensor may be to blame. I suspect that you will need a MAP sensor replacement, but without being able to watch live engine data, it is hard for me to confirm.

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

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: How do I read the event data recorder (EDR) information?

The event data recorder (EDR) system is a key safety feature in your car. The EDR collects information from your vehicle when an accident occurs. Among other things, the EDR tracks how fast you were driving at the time of...

Q: I want to know how to silence the seat belt alarm.

Hi there. The seat belt alarm is a safety device in the car to let the driver or the front passenger that their seat belt is not on. If the alarm is tripping on it own with the seat belt...

Q: How do I delete or edit the contacts in the Uconnect phonebook of a 2012 Dodge Ram?

If you are editing a contact, press the Uconnect phone button, which is a telephone symbol on either the center console or the steering wheel. The system will say “Ready” and beep, at which point you should say “Phonebook...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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.