Hyundai Repair Questions? Ask a Mechanic for Answers ASAP
no check engine light. It feels like no fuel is getting to the engine. It also seems like it starts out ok when it's cold but as soon as it warms up I notice a sluggishness.
One did a "air mass valve" (something like that) test. He said he thought it was the catalytic converter. That seems to be the number one answer.
The only reason I'm hesitating is I took it to someone who does only catalytic converters and mufflers and he told me that wasn't the problem.
I don't want to spend that money if it could be possibly something else much more simple.
Catalytic converter problems usually do present themselves with the symptoms you are describing.
There are a few ways to determine if it is exactly the cause.
The first and easiest is to remove the oxygen senor before the converter to allow the exhaust gas to escape. If it runs well the the converter is failing.
Another method is to check the temperature of the exhaust pipes before and after the converter and of the converter itself with a non contact IR thermometer.
Finally there is the back pressure test. Your mechanic removes the front oxygen sensor and screws in an adapter and pressure gauge. If the reading is over 1.5psi at 2500-3000 RPM the converter is bad.
From what you describe and personal experience with these vehicle it does sound like you have a converter that is partially clogged.
If the converter is clogged can it be fixed or does it have to be replaced. My car has both a front and rear converter. Does one affect the other?
Thank you. I've been pricing converters and haven't found any that low, maybe about twice that much. Plus they have to be Calif. legal. Any suggestion on where I can get that price? Last question. I promise