Skip the auto shop - Our mechanics make house calls

Q: Running Rich

asked by on

My scion is throws a check engine light, for running rich I was wondering if there's anyway to fix this. I took it to a couple shops and they get the light to go away but they don't fix my problem. I do have an after market exhaust on my car. I was wondering what symptoms you would get because of that.

My car has 130500 miles.
My car has a manual transmission.

A: Hello...I would hold off speculation on the...

Hello...I would hold off speculation on the effect of the exhaust retrofit until you performed the usual diagnostics on the engine issue that you have. Running rich could be due to oxygen sensors, fuel pressure regulation, problems with the air induction system and other causes of this sort. YourMechanic would simply perform an Check Engine Light diagnostic to get to the root issue(s). Feel free to contact us to get this resolved.

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・Save up to 30%

Get a quote

What others are asking

Q: Check engine light came on and car stopped

A failure such as this could be due to the fuel pump failing or essential sensors such as the crankshaft or camshaft position sensors failing. It is likely that diagnostic trouble codes have been recorded by your vehicle's PCM (powertrain...

Q: Clutch pedal doesn't come back up

You are experiencing the effects of a worn out clutch and pressure plate. It feels like there is a lot of play because the clutch disc is worn out. The pedal is not returning because the pressure plate springs are...

Q: The vehicle rides rough and there is a loss of power

Your vehicle has only 69,000 miles and so you want to make sure that the ball joint(s) has actually failed. So, best to either get a second opinion and have the Mechanic demonstrate the failure to you so you can...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...