RE: Low RPM roughness

[Reid Bishop <rbish@ibm.net>]

-----Original Message-----
>>From: owner-gmecm@diy-efi.org [mailto:owner-gmecm@diy-efi.org]On Behalf
>>Of KasaRyan@aol.com
>>Subject: Re: Low RPM roughness

>>you probably need a custom chip for your app, fuel pressure is a little
high,
>>do you have a speed sensor for road speed - you wont get mileage if you
dont

Yes, I have the speed sensor.  As far as I can tell, the only thing the 7747
uses the speed sensor for is to control the TCC on the 700R4.  I have
verified that the TCC is operating as expected.

Fuel pressure high tho?  From the book, 13PSI is right on the money?

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