My car when running creates the worst melling exhaust, smells worse than standing in a pit area of a bunch of runining race cars. Where do I start to eliminate this problem, is the fuel not burning right?
I had hollowed my cat out a couple of months ago, and it started smelling like strong exhaust and turning the back of my white car, yellow. I couldn't take the smell anymore so I had a new cat put on and it all went away.
I replaced my exhaust system and havn't fixed the problem on my car (75 so there is no cat). I've ran anywhere between rich to lean no smell difference. Very bad going down hills. When you push the pedal a little a putt or 2 of blue exhaust spits out going down hill. I need the head rebuilt since motor has plenty of compression. Check the compression to make sure motor isn't worn. I changed octane levels and decreased it alittle. Look for evidence of burning oil. Sam 75 280z, 81 820zxt