ECM fault?

CSH-HQ nacelp at jvlnet.com
Wed Nov 10 15:45:10 GMT 1999


Now, come on, have you looked at the wiring diagram?.
Grumpy


>Yes, I think that's the case and I don't have the O2 or related problem
>after all.
>Then the only alternative left is to eliminate ECM and run on propane for
>the test. I don't know how would I still get the ignition system to run
>without ECM control.
>
>-----Original Message-----
>From: David Cooley [mailto:n5xmt at bellsouth.net]
>Sent: Wednesday, November 10, 1999 9:15 AM
>To: gmecm at efi332.eng.ohio-state.edu
>Subject: RE: ECM fault?
>
>
>At 09:07 AM 11/10/1999 -0500, you wrote:
>>If O2 is not used at idle, then it's too bad, because it is the only thing
>>on the engine which appears not to work properly. It's response at idle is
>>slow.
>
>
>Actually got thinking of that... Response at idle will be slower, because 
>the exhaust is much cooler and the flow is much slower.  That's why PCM's 
>without heated O2 sensors have an open loop idle with Fuel cal set in a 
>fixed table and it's usually A/F ratio Vs RPM Vs Engine Temp
>
>
>
>===========================================================
>David Cooley N5XMT Internet: N5XMT at bellsouth.net
>Packet: N5XMT at KQ4LO.#INT.NC.USA.NA T.A.P.R. Member #7068
>We are Borg... Prepare to be assimilated!
>===========================================================
>




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