Skip the auto shop - Our mechanics make house calls

Q: I have my engine light on, and it popped up as "multiple misfires". I already replaced fuel injectors, coil boots, and spark plugs.

asked by on

I already replaced the fuel injectors, coil, boots and spark plugs. It will start up, but it turned off at a stop light.. it's not RPM right. Maybe it's a vacuum leak?

My car has 117100 miles.
My car has an automatic transmission.

Hi there. For the engine to stall out at a stopped position, then there could be a vacuum leak. Check to see if the engine will stall out when running at idle in park or neutral. If the engine does, then check the idle air control valve (IAC) and see if the vacuum link has came off. A small vacuum leak will actually make the idle higher than normal, but a large vacuum leak will make the engine stall out at low rpm speeds, even in park or neutral. However, it a IAC fails, then the idle will drop after deceleration and make the engine stall out. If you need further assistance with your engine stalling out at a stop light, then seek out a professional, such as one from Your Mechanic, to help you.

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!
  • Home
  • Questions
  • I have my engine light on, and it popped up as "multiple misfires". I already replaced fuel injectors, coil boots, and spark plugs.

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: It cranks doesn't start new batteries, oil pressure switch new pmd, new injection pump. new alternator, new glow plugs.

Hello. A crank but no start condition can be caused by many things. A few common causes are a faulty crank position sensor, or issues with the fuel system. The crank position sensor is used in the engine's fuel calculations,...

Q: Car hums when running hot

Hi there. Vehicles can make all sorts of noises and whines, for many reasons. Because vehicles can run hot, and make noises for a variety of reasons, many times it is best to have a professional technician, such as one...

Q: Smoke from underneath car

Hi there. An exhaust leak happens when your exhaust manifold: cracks, shifts out of place, or when the gasket does not longer seal against the engine. YourMechanic can diagnose this issue further in order to ensure correct part replacement. ...

Related articles

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...
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.