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**CaysE** · 11-03-2009, 12:59 PM

I'd say about 50% of the time when I come to a stop in neutral, the idle will be normal, and after 15-20 seconds or so, the AFR will start leaning out and vacuum drops from ~20in to ~10in. The idle gets really low and rough and it tries to die a few times, and after 5-10 seconds the AFR will quickly richen to around 12:1 and everything is back to normal. Then AFR will even out normally to between 14 and 15. Vacuum goes back to normal, as well.

Does this sound like a vacuum issue, or something to do with the tune? I haven't contacted McNews yet; I figured I'd post here first just to see if it might be an easy fix.

11-03-2009, 12:59 PM	#1 (permalink)
CaysE EDM Specialist Join Date: Dec 2004 Location: Bloomfield, NJ Posts: 11,139	Intermittent idle issue, SVT JRSC BBK I'd say about 50% of the time when I come to a stop in neutral, the idle will be normal, and after 15-20 seconds or so, the AFR will start leaning out and vacuum drops from ~20in to ~10in. The idle gets really low and rough and it tries to die a few times, and after 5-10 seconds the AFR will quickly richen to around 12:1 and everything is back to normal. Then AFR will even out normally to between 14 and 15. Vacuum goes back to normal, as well. Does this sound like a vacuum issue, or something to do with the tune? I haven't contacted McNews yet; I figured I'd post here first just to see if it might be an easy fix. __________________ 2003 Vermilion Red SVTf ··· ported JRSC BBK, ported head, 3" exhaust, Euro interior, more to come! 2002 Liquid Grey ZX3 ··· SVT replica · RIP 2010 2002 CD Silver SVTf ··· stock · RIP 2005 strictly/focused • team edm