Skip the auto shop - Our mechanics make house calls

Q: Was having Idiling problems then the engine light went on

asked by on

Was driving to work in traffic...when the car was idling the car started to shake. It continued happening and then eventually the yellow engine light went on. I've read it could be a number of things...lose gas cap, bad air filter or bad spark plugs. Then I was also reading it could possibly be a result of too much carbon build up in the intake values. Is there an easy way to diagnose? Thank you

My car has 100000 miles.
My car has an automatic transmission.

A: The vehicle may have carbon build up on the...

The vehicle may have carbon build up on the intake valves and would need to be scanned to see if the codes are for misfiring. The intake and injectors should be cleaned by a professional cleaner. Top tier fuels with cleaners should then be used to keep the fuel system and valves clean afterwards. I suggest getting your car looked at by a qualified technician, such as one from YourMechanic, who has the tools and capability to properly diagnose your Check Engine Light firsthand. Good luck.

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: Crank, no start

It is possible either a cam or crankshaft sensor has failed. The engine control unit relies on these sensors to detect engine rpm as well as to signal the tachometer. If one of them has failed, the ecu is not...

Q: Driver and passenger air bag light stays on.

Hello. Thanks for writing in. The airbag warning lights can come on for a number of reasons. The list is extensive, and due to the fact both air bags are being affected the issue is likely related to the main...

Q: My old Mercedes is shaking back and forth at 80kmh and then stalling

What you have described, back in the old days, are classic symptoms of a fuel pump failing or a clogged fuel filter. The pump can move enough fuel to keep the car going at slow speeds, but the engine starts...

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...