RE: check engine light

From: Rick Barnes (barnesrv@attbi.com)
Date: Wed Jan 22 2003 - 12:44:18 EST


IAT adjuster dirty, (maybe)? Its easy to clean, might be worth a try.
Rascal

-----Original Message-----
From: owner-dakota-truck@bent.twistedbits.net
[mailto:owner-dakota-truck@bent.twistedbits.net] On Behalf Of
jon@dakota-truck.net
Sent: Wednesday, January 22, 2003 12:11 PM
To: dakota-truck-moderator@bent.twistedbits.net
Subject: Re: DML: check engine light

"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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