Slight RPM Fluctuation (Normal ?) - The 1947 - Present Chevrolet & GMC Truck Message Board Network

PHOENIX · 02-17-2003, 04:16 PM

OK this is not related to the new msd module I installed.
It has done this with both the stock module and this msd.

I dont think its a big deal or anything, but just wanted to see what you guys have to say.

When at idle my rpm (on AutoMeter tach) will slightly fluctuate up and down. The lines on the tach represent 100rpm. It will move about 50 rpm. It doesnt move alot and it doesnt move fast. Just a little "floating" type of movement. Im just curious is this normal, if not what could casue this? If it is normal, when is the fluctuation not normal, how much fluctuation is normal?

Thanks!

02-17-2003, 04:16 PM	#1
PHOENIX Registered User Join Date: Oct 2002 Location: Phoenix, Arizona Posts: 4,703	Slight RPM Fluctuation (Normal ?) OK this is not related to the new msd module I installed. It has done this with both the stock module and this msd. I dont think its a big deal or anything, but just wanted to see what you guys have to say. When at idle my rpm (on AutoMeter tach) will slightly fluctuate up and down. The lines on the tach represent 100rpm. It will move about 50 rpm. It doesnt move alot and it doesnt move fast. Just a little "floating" type of movement. Im just curious is this normal, if not what could casue this? If it is normal, when is the fluctuation not normal, how much fluctuation is normal? Thanks! __________________ * AVOID: LOPER'S PERMORANCE / LOPERSPEED.COM OF PHOENIX, AZ & COTTMAN TRANSMISSION *



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