the only thing is that i put a new catco high flow convertor on a few months
ago, and the light had come on before that, is there any way the o2 sensors
can be checked to see if they are within operating tolerances?
>From: jon@dakota-truck.net
>Reply-To: dakota-truck@dakota-truck.net
>To: dakota-truck-moderator@bent.twistedbits.net
>Subject: Re: DML: check engine light
>Date: Wed, 22 Jan 2003 17:10:59 +0000 (UTC)
>
>"Jon SEYMOUR" <n9ngw@msn.com> wrote:
>
>: Hi all, i've got a check engine light problem that seems as if it will
>not
>: go away, it comes up with code 420, which according to the guy at
>autozone
>: says catalyst system not at efficiency level.
>: I have replaced both the forward and rear O2 sensors along with the
>: catalytic convertor, and have cleared the code, but it comes back in a
>few
>: days.
>: The truck seems to run great, no chugging or coughing, it starts good,
>but
>: the only thing is that i get maybe 16 mpg with the v-6 and auto trans.
>: I have been thinnking about having the injectors cleaned at a garage and
>was
>: wondering what everyone thought, this thing is driving me nuts.
>
>
> Your cat may be on the way out. You should be able to get a new
>one for around $50 (actually, it is probably still covered by the
>factory emissions warranty - I believe they are required to warranty
>them for quite a while, might be worth checking out at the dealership)
>
> I don't think an injector cleaning would do anything for you because
>if anything, clogged injectors would lean out your fuel mixture, and
>in order to get the above code, the opposite would be true (too rich).
>I think that a problem with your fuel injectors would have showed up in
>other codes before a P0420 was triggered.
>
> You've already eliminated the O2 sensors themselves, if it were me
>I'd check into the cat.
>
>
>--
>
> -Jon-
>
> .---- Jon Steiger ------ jon@dakota-truck.net or jon@jonsteiger.com
>------.
> | I'm the: AOPA, DoD, EAA, NMA, NRA, SPA, USUA. Rec & UL Pilot - SEL
>|
> | 70 Cuda, 90 Dak 'vert, 92 Ram 4x4, 96 Dak, 96 Intruder 1400, 96 FireFly
>|
> `------------------------------------------ http://www.jonsteiger.com
>----'
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