Skip the auto shop - Our mechanics make house calls

Q: When starting RPM of car starts going down and then engine stops.

asked by on

My car is 2008 model Mazda Axela (BK5P) 1.5L and done 141,000 km. The fuel is LPG with automatic transmission.

My car started misfiring and the mechanics changed the coil and recently serviced transmission oil and engine oil, oil filter and air filter.

The problem is as soon as I start the car, the rmp starts going down while still on idle. I press the gas pedal the rpm sometimes would go up and sometimes it will not go up but will decline to 450 and will turn off.

If rmp doe go uo then as soon as I engage the gear to drive, the rpm will decline and engine will stall and switch off. Note engine check light doesnt appear.

I took the car to mechanic and they serviced the regulator, and fuel filter and cleaned gear box sensor but the problem persists.

Please need your advice as I live in Fiji a small country and the mechanics cannot resolve the issue.

My car has 141000 miles.
My car has an automatic transmission.

It sounds like you may have a fuel supply problem in getting the proper amount of fuel to the fuel injectors which may be caused by a bad fuel pump or potentially faulty fuel injectors. This can happen when the pump itself is not working properly or when the fuel pressure regulator is not maintaining the proper fuel pressure in the fuel system causing the engine to starve for fuel. This can also happen when there is insufficient connectivity to the fuel injectors which can cause an intermittent fuel spray pattern into the intake system resulting in a lean fuel condition or the motor otherwise starving for fuel.

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
  1. Home
  2. Questions
  3. When starting RPM of car starts going down and then engine stops.

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: Mazda says that I need a engine. After two years of dealing with a Mazda shop not knowing what to do with the car. Now I need a

If your present engine is original and it has operated over 200,000 miles, you did very well. Not knowing your mechanic's specific diagnostic, though, it is hard to give you optimal advice about how to proceed. An initial priority is...

Q: what is the right price to pay for the job

You have four different motor mounts on your 2004 Mazda3 and would need to have all of them checked and replace any that are broke. They range in prices and labors to replace them depending on the car. If you...

Q: Check Engine light comes on, mechanic replaced o2 sensor but light still comes on.

Hi there: If the mechanic completed the O2 sensor replacement, reset the codes and the error code was triggered again, it is possible that the catalytic converter is damaged and needs to be replaced. However, it's also very common for...

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...
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...
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.