Questions about Exhaust systems, Catalytic Converters and Headers/Manifolds

learn more… | top users | synonyms

4
votes
0answers
19 views

Mercedes veto Exhaust

Just got a new exhaust fitted, the part that goes from the front wheel area all the way to the back. And NOW there is a smell of exhaust fumes in the veacle, that seams to be coming from the vents. ...
3
votes
0answers
41 views

Decreased MPG, clicking sound when pressing accelerator

Over the past week, the MPG on my car has gone down significantly, about 3-4 MPG. My driving habits have not changed. In the meantime, there is a distinct "pneumatic" clicking sound whenever I press ...
3
votes
0answers
40 views

Oddball Cat and Exhaust Manifold 04 Nissan Xterra

I recently got the p0420 code and narrowed the issue down to needing a new cat. Thought i'd be smart and went to Walker identify the exhaust for a basic '04 Nissan Xterra XE, 4WD, 3.3L. Found the ...
1
vote
0answers
29 views

Nil HydroCarbon in the exaust

If hydrocarbons (HC) are nil and Carbon Monoxide (CO) is 0.33% and Carbon Dioxide (CO2) is 14% Why does the HC show up as nil? Is there a problem with having no HC readings?