Missing the Buz -or- My Fuel Distributor is too quite and my car runslikecrap

[David Head]

I'm not sure which temp sensor it is, been too long.
BUT: The duty cycle dude should ALWAYS be operating. If its not, its not a sensor problem, its either a power problem (aux contact in the fuel pump relay) or ECU/wiring to it...

robert_a_dupree at bankone.com wrote:

> Ooohhh interesting.
> According to the owner (guy I sold it too)
> The temp guage is indicating lower, coiciding with the running like crap.
>
> TPS is functioning.  Verified by ISV kicking in and the fast return to idle
> from rev'd state.
> When unplug'd the idle is higher and the revs drop slowly.
>
> When the 02 was unplugged, nothing changed.
> 02 was new 10k/1yr ago.
>
> When you say temp switch, are you implying the MutiFunctionTempSender?
>
> One other data point is it was very, very hard to start when cold.
> Started good when hot, although I didn't wait for more than 60 secs...
>
> Cold start injector maybe???
> Vaccuum leak?  Dip stick test yields a worse stumbling condition.
>
> RD
>
> David Head <v8q at bellsouth.net> on 08/14/2002 10:42:57
>
> To:   robert_a_dupree at bankone.com
> cc:
> Subject:  Re: Missing the Buz -or- My Fuel Distributor is too quite and my
>       car  runs likecrap
>
> O2 Sensor, WOT switch and temp switch.
> If temp is low, duty cycle is fixed (during warmup, open loop)
> After warmup, its variable based on the O2 sensor (closed loop)
> WOT switch, fixed to enrich (open loop)
>
> robert_a_dupree at bankone.com wrote:
>
> > This I am sure is related the other message dealing with the missing
> > Engine-Speed-Sensor code that it being observed but...
> >
> > I need someone to refresh my memory on how the duty cycle function works
> on
> > CIS.  Or rather what are the critical inputs to re-enable the duty cycle
> > function.  The buzz is gone, and even when using the basic quick check of
> > moving the fuel flap up or down (while running) I don't get the buzz.
> >
> > As soon as I find the fuel pressure tester I will check control and
> system,
> > but what other sensors, components, or functions are required for fuel
> duty
> > cycle?
> >
> > Rob D.
> >
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> This transmission may contain information that is privileged, confidential and/or exempt from disclosure under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or use of the information contained herein (including any reliance thereon) is STRICTLY PROHIBITED. If you received this transmission in error, please immediately contact the sender and destroy the material in its entirety, whether in electronic or hard copy format. Thank you.