Skip the auto shop - Our mechanics make house calls

Q: High CO2 emissions on a '98 Mitsubishi Carisma

asked by on

I have a Mitsubishi Carisma 1.8 GDI from '98. The CO2 emissions are really high. Is it because of the direct fuel injection system or maybe the catalyst?

Often it’s a GDI because they carbon up the engines over time. Pay a mechanic to carbon clean the entire engine. Then you’d want to pray that the cat hasn’t been ruined. It may already be ruined. It’s a ’98 so it’s really old. Have the engine carbon cleaned first. Start there. Still, you might need a new catalytic converter because of the age. It had been throwing oil in the engine and carbon’ing up. If it clogged up the catalytic converter with carbon, it needs a replacement. If you want to have this looked at by a certified technician, a certified mechanic from YourMechanic can inspect your vehicle and replace your catalytic converter for you if necessary.

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!
  1. Home
  2. Questions
  3. High CO2 emissions on a '98 Mitsubishi Carisma

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: Car cranks, but doesn't move. What could it be? Brakes recently cleaned by auto shop.

I'm not exactly sure what you are describing here. So I will need to make an assumption. From what I can gather, your car starts, but when you put it in gear and step on the gas pedal, it won't...

Q: My truck runs for a few seconds then dies

When you have low fuel pressure but recently replaced the fuel pump and relay, the issue is typically vacuum-related or caused by a clogged or worn out fuel injector. The vacuum issue may be related the the EGR valve or...

Q: I just replaced my radiator and it's leaking transmission fluid.

Hi there. The transmission cooling lines are very tricky on a Mitsubishi Eclipse. Sometimes cross-threading or not properly tightening the lines can cause them to leak while, in some instances, a rubber o-ring inside the line might be pinched. The...

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 Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...