Skip the auto shop - Our mechanics make house calls

Q: Truck not passing emissions test

asked by on

My truck did not pass an emissions test, and a full tuneup was recommended. It's a V6.

For a vehicle that is over twenty years old, a full tuneup could mean a lot of maintenance, from plug, wires, filters and injectors, to major components, in order to fix the emission failure. These engines have a problem with the injection system that can cause the system to run too rich, or too lean. I recommend having a mechanic, such as one from YourMechanic, run a thorough diagnostic check to see what the engine would need to pass the test, and put together a repair list.

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: P0420 code and dash lighs on

The vehicle stability control (VSC) light and code P0420 are for two different problems. The VSC system would need to be tested for codes for that system. The code P0420 is for the O2 sensor or problem with...

Q: Wheel bearings

It sounds like you may have a failing or worn out wheel bearing. A wheel bearing will usually fail due to pitting or small damage on the surface of the rollers or the bearing race. Both the surface of the...

Q: I have a 1993 Honda Accord that needs brakes and front suspension and drive lines put back on. Car is on jacks.

Hi there. If you are needing to replace parts, then I recommend putting on the OEM specified parts that are required for your vehicle. If you are needing someone to assist you in fixing your car, then seek out a...

Related articles

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
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.