Skip the auto shop - Our mechanics make house calls

Q: Car dosent not stay on and it's running very rich

asked by on

Car does not stay on when I turn it over it starts up right away then it dies ( 5speed) but if I hold the gas down at a specific point the car will stay on and the rpms will jump up and down and car will smell very rich the car is OBD0 and car is throwing map sensor code and ignition and fuel system and I'm curious to know if the map sensor can trigger this issue... the car has a map on the throttle body and a spare against the fire wall I tire both but car is doing the same and the odds of them both being bad is kinda hard to belive from my point of view but I would like to know if there is something else I'm missing like is there something else that can cause this situation. Thank you

A: The MAP sensor relies on the correct signal...

The MAP sensor relies on the correct signals being sent to it. It is possible that the sensor itself may be working properly, but that the input signal to it may not be working properly. Try checking this along with the O2 sensor as well as this can also cause the car to run rich if it is picking up incorrect exhaust gases and making the wrong changes to the fuel mixture. If you need help pinpointing the fault, a certified professional from YourMechanic can come to your car’s location to diagnose the stalling problem and assist with repairs.

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: car acts like battery is dead but it's not

Since you have a multimeter, check the battery voltage drop on each battery cable to see if the voltage drop is more than .2 volts to the starter and ground. If you have good cables and are getting a start...

Q: Engine and lights pulsing

From the symptoms you describe, it would appear that the vehicle is experiencing an electrical problem. There is a technical service bulletin that addresses a problem similar to this, indicating that there may be a problem with the wires underneath...

Q: Grounded out ignition switch

Hi there. The ignition switch will need to be replaced as it was grounded out. If there is still no power when the switch is replaced, then you will need to check all of the wiring from the ignition switch...

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...
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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...