[Gmecm] Tracker TBI Problems still

[kc]

u got the wrong guy

i have a 92 riv with ERROR on odometer!!!


James Panter wrote:
> How many miles on the vehicle?   Perhaps the catalytic converter is 
> bad or plugged.  Have you done a compression or leak-down test to 
> confirm engine conditon?
> ----- Original Message ----- From: "Ford, Pat" <Pat.Ford at nrc-cnrc.gc.ca>
> To: <gmecm at diy-efi.org>
> Sent: Monday, June 11, 2007 8:05 AM
> Subject: RE: [Gmecm] Tracker TBI Problems still
>
>
> Did you ever get to the bottom of this?
> Pat
>
> -----Original Message-----
> From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On
> Behalf Of Cowen
> Sent: Wednesday, January 24, 2007 4:00 PM
> To: Gmecm at diy-efi.org
> Subject: [Gmecm] Tracker TBI Problems still
>
> Well, it failed AirCare again yesterday.  I am getting the CO a little
> lower, but it's still high.  It's allowed about 12.5 g/km, but it's
> reading about 14.25 g/km.  All other emissions tested are good.
>
> My mom has the identical car (even color!), and it passed AirCare on Dec
> 19th no problem.  So, I've got a source of known good parts!  Here's
> what I've done:
>
> -Cleaned/tested EGR
> -Cleaned EGR vacuum modulator, then swapped it -Cleaned/tested PCV
> -Cleaned IAT and ECT sensors to ensure connectivity -Cleaned and greased
> all engine grounds (4) -Disassembled and Cleaned Throttle body, blew out
> all passages w air, new gaskets -Set valve lash -Confirmed good, even
> compression -Tried to inspect injector spray pattern w strobe, pod
> obstructs view, but no large drops - seems to be a mist -Checked Fuel
> return line - clear of obstruction -Compared Fuel Press Reg with mom's -
> couldn't make either do anything, so at least they're the same.
> -Checked purge canister - not flooded w gas -Checked all vacuum hoses -
> no leaks, no obstructions -New plugs, gapped to 0.028"
> -Checked base timing.  Strange, I shorted the check connector as per the
> VECI, but couldn't affect the timing.  Have I lost ECM control of
> timing?  How??
> -Swapped cap, wires, rotor, and distributor -Swapped coil and ignitor
> -Swapped TPS -Swapped O2 -Swapped MAP and MAP line w filter -Confirmed
> MAP port on manifold is clean -Replaced suspect capacitors in ECM
> -Swapped ECMs, although I didn't actually run it through an AirCare test
> with swapped ECM, because it didn't feel like it ran any different with
> Mom's.
>
> Symptoms: Beginning quite abruptly in late August, abysmal mileage,
> hesistation/light missing on light acceleration.  Oh, and has failed
> Aircare for the same reason 3 times since Nov 25th!
>
> Strangely enough, I did a ton of work in one day, including redoing the
> TB, and it ran PERFECTLY for about a week!
>
> It runs well otherwise, uses little oil, and has plenty of power.  What
> am I missing??  Why does it run so rich?
>
> Thanks for any suggestions!
>
> **********************END TRANSMISSION**********************
>
>
>
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