RE: Help with timing!!

["Aaron Ness" <aaron@makuta.com>]

Assuming it is detonation, could your mixture be too lean, causing it to run
a bit on the warm side?  This tends to be a factor with ACVW engines, but I
can see it happening with a watercooled engine as well.  How do your plugs
look?  If you shift into a lower gear, does it stop pinging?

Aaron
'84 Scirocco - Woo-hoo!
'70 Bug - hibernating
'87 Nissan truck - Soon to be for sale

> -----Original Message-----
> From: owner-scirocco-l@scirocco.org
> [mailto:owner-scirocco-l@scirocco.org]On Behalf Of Jonathan Miles
> Sent: Monday, February 07, 2000 3:31 AM
> To: scirocco-l@scirocco.org
> Subject: Help with timing!!
>
>
> Hi all,
>
> Please can someone help me out here.  I have a 1990 Scirocco
> GTII which is
> making a light, metallic, tapping noise.  The noise occurs
> only under load
> e.g low gear, up a hill and open throttle.  I'm pretty sure
> that it's caused
> by detonation (Pinking, Pinging?).
> It sounds for all the world like the timing is too far
> advanced and yet if I
> retard the ignition (even to the point that the engine barely
> runs)  it
> still occurs.  I've used a strobe light to check the timing
> and all seems
> fine.  Vacuum advance works, as does mechanical advance.
> What is going on!?
>
> The car has a Pierburg 2E2 carb (unfortunately) but this
> seems to be working
> OK. All vacuum hoses are in good shape and the cold
> start/waxstat system is
> good.
>
> My question is:
>
> 1.  What is happening and how do I fix it.
>
> 2. If the problem is caused by mis-alignment of
> crank/intermediate/camshaft
> caused, say, by cam-belt slipping. How do I re-align them?
>
> 3. Can anyone identify the timing marks on the fly-wheel
> (accessed through a
> hole in the transmission).  Is the deep V-shaped mark TDC, or
> is TDC the
> fainter dot to the right of the V (facing the fly-wheel?
>
> I'm tearing my hair out over this one and I'd be really
> grateful if anyone
> can save me having to buy a new carb. (my prime suspect at
> the moment).
>
> Cheers,
>
> Jonathan
>
> '90 Scirocco GTII
>
>
>
> --
> Email problems to: scirocco-l-probs@scirocco.org  To unsubscibe send
> "unsubscribe scirocco-l" in the message to majordomo@scirocco.org
>


--
Email problems to: scirocco-l-probs@scirocco.org  To unsubscibe send
"unsubscribe scirocco-l" in the message to majordomo@scirocco.org