i'm using a stock satria 1.3 wif vacumm meeter.when i 1st install it ..the meter was on 20-25..but now, for quite couple of mths oledi, whenever i step on accelerator fully, the indicator is on 0...n when i start engine,its on 8mmmg...wat does it means... meter on 8 when start, 5 on normal acceleration, 0 on full step on acceleration...any experts can tell? thanks