Skip the auto shop - Our mechanics make house calls

Q: Starter and catalytic converter failure

asked by on

Two weeks after purchasing the vehicle, the check engine light came on and I experienced loss of power during acceleration. Dealership advised that it may be a dirty fuel injector and to use injecter cleaner and wait two weeks. No results came from thar, so they told me to wait another two weeks. I had to move out of state at that point. Upon my arrival in my new state of residence, i had the oil changed and was told there was "a puddle of oil" in my intake. My fuel economy started to plummit and the car started experiencing trouble starting. OnStar reported an emission system issue and codes ran by autozone indicate cylinder 4 failure. After taken to local Chevy dealership, the starter and catalytic coverter were found to be bad but mechanic said he "just changes them out" and didnt know how to find the root cause. I know some of these vehicles have timing chain problems and wonder if this could be it. My gut tells me the dealer doesn't want to honor the warranty.

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

A: Hello. From what you describe it seems that...

Hello. From what you describe it seems that your vehicle has more than one issue.

Oil in the intake is usually caused by a dirty or clogged positive crankcase ventilation (PCV) valve or system. I would check to make sure the the PCV valve and all of the tubing is in good condition, not excessively dirty or grimy.

Regarding your timing chain concern, timing chains usually make a lot of mechanical noise that is very noticeable, especially when starting the car. If the vehicle is not producing these symptoms, the timing chain is probably okay.

In regards to your other symptoms, of power loss and trouble starting, the starter and catalytic converter can both cause that, however so can many other things. I would recommend having the vehicle diagnosed by a different mechanic, if this one was unable to find the root of the issue. A certified mobile mechanic from YourMechanic can inspect your vehicle’s issues at your home or office.

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: When I fuel up, my car will not start, it takes about 3 tries and I have to pump the gas

Can you hear the fuel pump prime when you turn the key to "On" before cranking it over? Before starting, turn the key to "On" for a few seconds. Listen carefully for a faint "whirling" sound. Have you had the...

Q: Are fuel injector banks and catalyst converters considered different issues and warranties?

Question sent to CS for warranty information regarding fuel injectors and catalytic converters for a Chevrolet 2010 V6-3.6L.

Q: Shop says my coolant system hoses need to be replaced immediately. What does that mean? 2010 Chrysler 300

Hi there - your shop may be legitimately looking out for you by warning that your radiator/coolant hoses need replacement. They do "age" with both heat cycles (hot/cold/hot/cold) and time - ozone in the air damages all rubber over time....

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...
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...