2003 Mitsubishi Galant any body help me on this galant

2003 MITSUBISHI GALANT

138,255 MILES • 4 CYL • FWD • AUTOMATIC

NOOR_HAWAMDEH

MEMBER
10 POSTS

hello expert
i have mitsubishi galant lately i've experienced an un burned fuel (gasoline) from exhaust with a high fuel consumption
i changed the spark plg,coils, but still the same
lately a friend adviced me to check it by 4 gas analyser but no body tell me what this reradings mean:
co=1.5 co2=13 hc=225 PPM o2=0.5 lamda=0.989

from this readings do any one tell me what is the problem with my car?

thank u

Sep 20, 2008 at 5:43 AM

RASMATAZ

✓ASE Certified Mechanic
75,992 POSTS

Carbon monoxide is on the border line and Hydrocarbons high

For a start get the catalytic converter checked out

Sep 20, 2008 at 6:33 AM

NOOR_HAWAMDEH

MEMBER
10 POSTS

[quote:26dead6bc9="rasmataz"]Carbon monoxide is on the border line and Hydrocarbons high

For a start get the catalytic converter checked out[/quote:26dead6bc9]

dear expert i got a new catalyser from it agency its a new one

Sep 20, 2008 at 7:38 AM

RASMATAZ

✓ASE Certified Mechanic
75,992 POSTS

Hydrocarbon failures mean unburned gasoline is passing through the engine and entering the exhaust. The three most common causes include ignition misfire, lean misfire and low compression (typically a burned exhaust valve). Ignition misfire can be caused by worn or fouled spark plugs, bad plug wires or a weak coil. Lean misfire results where there is too much air and not enough fuel, so check for vacuum leaks, dirty injectors or a fuel delivery problem. In addition to these, hydrocarbon failures can also be caused by oil burning due to worn valve guides, valve guide seals and/or rings.

Sep 20, 2008 at 1:10 PM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.