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tasdrouille · 04-21-2009, 10:03 PM

The Scangauge uses the MAF signal for the MPG calculation. To prove it unplug your MAF and look at you instant MPG, it'll be really high. It also uses the IQ value, as you noted from your tune.

I would suspect a failing or low reading MAF or a bad connection. Some people fill the MAF connector with dielectric grease and that resolves the problem. But your car was apparently pulling smoothly so I don't know.

The timing value is relative to BTDC. A value of 3 is BTDC. Minus values are ATDC.

04-21-2009, 10:03 PM	#2 (permalink)
tasdrouille Master EcoModder Join Date: Jan 2008 Location: Mirabel, QC Posts: 1,672 The Guzzler - '08 Hyundai Elantra GL 90 day: 33.12 mpg (US) Got Soul? - '11 Kia Soul 2U Thanks: 35 Thanked 86 Times in 57 Posts	The Scangauge uses the MAF signal for the MPG calculation. To prove it unplug your MAF and look at you instant MPG, it'll be really high. It also uses the IQ value, as you noted from your tune. I would suspect a failing or low reading MAF or a bad connection. Some people fill the MAF connector with dielectric grease and that resolves the problem. But your car was apparently pulling smoothly so I don't know. The timing value is relative to BTDC. A value of 3 is BTDC. Minus values are ATDC. __________________ www.HyperKilometreur.com - Quand chaque goutte compte... Last edited by tasdrouille; 04-22-2009 at 07:44 AM..