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.

A: You have definitely thrown a lot of parts a...

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

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: How do I adjust the air outlets?

You can adjust the air outlets to control where the hot or cold air is blowing in your vehicle’s cabin. To do so, simply adjust the outlets with your fingers until they are pointed in the direction of your choice....

Q: How do I adjust the speed of the windshield wipers?

Depending on how heavy the rainfall is, you’ll want to adjust your windshield wiper speed. Doing so is easy. When you turn on the windshield wipers, they will be at a low speed. Turn the windshield wiper knob farther, and...

Q: Do I need to program the Sentry Key immobilizer system?

The Sentry Key immobilizer system is a security feature in your car. The system disables the engine if an unauthorized key is used to try and start the vehicle. This helps keep your vehicle from being stolen. The Sentry Key...

Related articles

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...
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...
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...