Skip the auto shop - Our mechanics make house calls

Q: Fuel problem?? 1993 Chevrolet S10

asked by on

I have found fuel in my oil and it has had rough idle for about a month although we just found the fuel oil mix. It has a hard start problem and smells like it's burning rich we've done a tune up changed idle and throttle sensors . Checked timing and replaced fuel pump. Idk I'm stumped

My car has 180000 miles.
My car has an automatic transmission.

Hi there - I’m thinking there are a couple of possibilities since you have identified what is clearly a ["running too rich"](https://www.yourmechanic.com/question/fuel-rich-smell-from-car situation. Leaking fuel injectors could cause this problem, high fuel pressure, or a faulty coolant temperature sensor signal would make engine management think it was VERY cold, and dump more fuel in to compensate. A failing coolant temp sensor that was reading too low, or a wiring disconnect to the coolant temp sensor would produce the symptoms you see. Check those for sure. For assistance, I recommend a rough running inspection performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, and give you an accurate assessment of damage and cost estimate for repairs.

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

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: Bad gas mileage on a European 1.6-cylinder, 8-valve car

Have a mechanic look at the data coming out of it. See if the MAF sensor is wearing out and not giving the right data and see how fuel injectors are firing. Perhaps you have a fuel injector servicing done...

Q: My car starts and runs but after getting up near 200 degrees it starts to sputter and stalls. It will not restart until it cools o

You will need to see if you have lost spark to the spark plugs after the engine dies. If it did then you most likely have a bad distributor assembly behind the water pump. Make sure you replace the spark...

Q: The ✔️engine light comes on after driving for about 2 minute and then goes out after you turn the car off then comes back

Hi There, If you have replaced the EGR Valve and it is still producing the same code, you may also have a faulty EGR vacuum modulator. The EGR valve allows the flow of exhaust gases into the intake manifold in...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
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.