Subject: Re: Emissions Question by CentralCoaster on 2009/8/11 22:02:35
Quote:
anesthes wrote:
AIR pump eliminated could cause a lean condition. When AIR injection is set to MANIFOLD (three modes present, cat, manifold, and divert which happens at WOT) it subtracts .100 from the 02 feedback when calculating fuel correction because normally fresh air is injected into the exhaust stream.
I disagree with this. I believe the a.i.r. pump, in '85 at least, only diverts to the manifolds during open loop. Therefore the O2 feedback would never be affected by it.
I don't know about the rotten egg smell, but my truck has no cat and the exhaust stinks, but I think it's more related to the previous owner's shitty rebuild puking oil past the rings.
