Periodic backfire into intake on NG engine

[John S. Lagnese]

Sticky or leaking intake valve?
----- Original Message ----- 
From: "David" <duandcc_forums at cox.net>
To: <quattro at audifans.com>
Sent: Monday, July 25, 2005 1:45 PM
Subject: Periodic backfire into intake on NG engine


> Patient is my 1987 Coupe GT 2.3. This has hppened 2 or 3 times. I will be
cranking to start her, I hear a bang or pop and she wont start or runs
terribly. Upon inspection, I find that a vacuum hose has popped off or been
"popped" by excessive pressure. The first time, I assume ti was jsut loose
to begin with and had popped loose. But the pop/bag noise makes me wonder if
it might be a back-fire into the intake. So, any thoughts on what would
caudse her to back-fire into the intake? Doesn't happen often, but is really
inconvenient when it happens and disables the car just when I need her
most...
>
> Dave
> 1987 CGT 2.3
> SE VA
>
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