Intake back fire?

[flaatr at yahoo.com (Euroroc II)]

Check your cam timing... coulda skipped a tooth on the timing belt.

Sounds familiar to the exploding MK1 I dealt with a week or so ago but that 
one was completely off. fortunately we had the intake plumbing kinda 
loose... blew the pipe right off the car when it backfired!

  Why do people want me work on their cars???
-Raffi

Just a side comment... the Mk1, a black 1980 Scirocco S, came back to life 
last Sunday. It hasn't run in 6+ years and after a new fuel line, 2 fuel 
pumps (new pump we installed was defective and crapped out), timing belt, 
v-belt, radiator fan switch, etc., etc., etc., and a little rewiring to get 
the ignition to spark, a little tuning... the car is a screamer! Old school 
suspension techniques sway bars, and a few other pieces... it's rock solid 
on the turns and pulls great for a 1.7... Another Scirocco returns to the 
black top! Rob will hopefully join us at the next NorCal drive.



At 09:34 PM 6/24/2003 -0700, you wrote:


>Okay,  I figure I have a problem with the Roc now...
>
>It has been running great for the last few months. Not a problem.
>
>Tonight I jump in to take a quick drive.  It turns over a couple times,
>catches and just starts to rev when BANG!  The loudest Bang I have heard
>comes out from under the hood, it dies and a small trail of black smoke
>curls up from the front of the hood by the grill.  It was loud enough that
>the wife poked her head out the front door and asked if I blew up the car :(\
>
>
>When I popped the hood what I found was that the boot on the air meter was
>blown right off (it was sitting on the battery), the boot on the TB was
>blown off and hanging there, and the pipe between the two was wedged
>between the rad fan and the oil filter.
>
>Only thing I can think of is the poor thing back-fired through the intake
>and blew the intake connections off.
>
>But WHAT would cause that?  Especially since it has been running better
>than ever the last few months?
>
>My thought is maybe the timing belt slipped. Is that possible?
>
>I need suggestions. It is parked now, as I don't want something like that
>to happen when I am at full speed and find some serious damage.
>
>and on the topic of damage, what kind of damage can an intake back-fire cause?
>
>TIA
>
>Cory
>
>
>
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