Date: Sun, 26 Aug 2001 04:05:28 -0400 From: Fred Hess <surffnopsambeyq.arg> Subject: Re: O2 sensor & black smoke?
On Sat, 25 Aug 2001 14:20:55 GMT, Tony <NOSPAMtshiminopsam.com> wrote: >"Karl R. Buschhaus, Esq." wrote: > >> problem. I'd change the fuel filter long before I'd sink the cash >> into a new 02 sensor. >> > >I agree, if black smoke comes on only under heavy load I do not >think the O2 sensor would be the first place to look. > >Is there any hesitation while this smoke is happening?. Black >smoke is usually an indication of unburned fuel. Also this could >be an excessive deposits on the cylinders, particularly if the car >is driven for short distances. Maybe you need a good fuel system >cleaner (two treatments of Chevron's Techron Concentrate). > >In addition to what Carl is saying, I would check plugs, plug wires >and check fuel pump and change air filter (and while at it fuel filter). >All these are cheaper than an O2 sensor. All the speculation going on that a simple VOM could test (o2 sensor), but I digress. Wouldn't failed signal from the lambda sensor trigger the ECU to believe the engine was running lean? Wouldn't this signal create a rich running vehicle all the time?
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