Skip the auto shop - Our mechanics make house calls

Q: Runs rough. Wont start

asked by on

so i was driving around and all of a sudden my car started to rev funny. it would accel slowly and almost like it had water in the gas. when i would slow down it would act like it was going to cut off still rpms reving a little at idle. so on my way home the engine light came on and it would blink when i pushed the gas. so i made it home and let it sit till morning and when i came out today i started it still ran pretty rough but this time i couldnt even make it around the block before it would fail again. any answers?

My car has 130000 miles.
My car has an automatic transmission.

A: Without more information, its hard to tell ...

Without more information, its hard to tell what the issue may be.The Check Engine Light coming on is a good thing. This is the sign that the computer has detected an issue, and will set a diagnostic troubleshooting code(s). Start by scanning the vehicle for codes. These should give you an idea of what the problem is. If any sensors have failed, or electrical issues have occurred, they will very likely show up here. It is possible you could have more than one issue, but when you receive your codes, try to find the component they all have in common. If the codes are unable to be read, you will want to think about the basics for the vehicles function: air, fuel, and gas. The engine is not getting one of these correctly. Or the combination of air and gas is not being ignited correctly. With that in mind, you will need to go through those systems methodically until you find the issue. Since the issue happened suddenly, you will want to perform a thorough visual inspection. Are any fluids leaking? Are any hoses or lines disconnected? Are any components broken or physically damaged? Have you checked the fuse box for any damages? Is there a smell of any kind? Do you see any smoke? There is more information about engine roughness to help you diagnose the issue on our website, and available appointments by a certified mechanic.

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: I can't go into 4th or 5th gear and clutch does not engage after a recent clutch job, clutch release while in gear does nothing.

I would rule out the axle not being pushed all the way in. That would effect all speeds and gears. That you can engage gears other than 4th and 5th leads me to 2 m possibilities: 1. Shift linkage mis-adjusted....

Q: Leaking on

Hello. There are a few possibilities such as you may have a bad axle bearing or the bearing itself is seizing. This in turn will damage the axle and the seal. You will need to have the axle bearing and...

Q: Check Engine light on; engine revs and has reduced power

Your 2003 Envoy seems to have quite the variety of symptoms, and these could indicate a variety of problems. The smell of gas may be due to a fuel leak or may be an issue with the EVAP system. Or...

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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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...
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.