Vance,
When I pulled my valve cover I found that #2 cylinder exhaust valve
lifting rod had disengaged from the rocker...hence the cylinder was
exhausting via the inlet port producing the backflow form the carb.
Last year I had adjusted the valve lash to .012" as I'm running a
road/rally cam, and fitted hotter plugs. The plugs were rather oily
and fouled. I'm wondering if all this led to my pinking issue which led
to my lifting rod skipping out of its adjuster.
The rod looks straight so I'll button it all down again and set the lash
back to spec. I'll replace the plugs (again back to spec) and set the
timing.
I'm hoping my cam lobe and follower are not beat up - I don't really
want to lift the head to have a look. I might try measuring the lift to
look for a reduction in the lobe. I'm also wondering about the head
gasket given I had no functioning exhaust port...I've done a compression
test and 1 & 6 are significantly higher than the rest (30 PSI delta)
which is a big change from the last time when we were all within spec.
Cheers,
Steve
-----Original Message-----
From: Navarrette, Vance [mailto:vance.navarrette@intel.com]
Sent: April 24, 2007 11:51 AM
To: Rudnicki, Steve
Cc: 6pack@Autox.Team.Net
Subject: [SPAM] - RE: [6pack] Carb ignition? - Email found in subject
Steve:
The lift the slide test is unreliable if your car is modified.
O2 sensors, Colortunes or other techniques are more reliable on modified
cars. Also, the lift the slide test assumes the car is in a good state
of tune, which yours clearly is not. So don't place too much weight on
the results.
You didn't give us much information - Under what conditions does
it knock? Warm/cold/uphill/cruising?
In the absence of more information, will say the following
(ignorance never stopped me from offering an opinion!!!!):
1. First, you must fix your leaks. If it is visibly leaking,
there is no point in proceeding.
2. You said you retarded your timing, but you didn't say to what
value. Disconnect the vacuum retard and set the timing to 10BTDC using a
timing light.
3. Set your valve lash. If an adjuster backed off it could
explain your symptoms.
4. Time for a fresh set of plugs? Pull your plugs, clean and gap
them. If you have fouling or damaged plugs, replace them.
After you have covered these issues, we can start the more
elaborate trouble shooting.
Also, I attached the factory trouble shooting guide (PDF). It
may be helpful. Listers will not see it since the server will strip it,
but Steve should get a copy.
Cheers,
Vance
The information contained in this e-mail message is PRIVATE. It may contain
confidential information and may be legally privileged. It is intended for the
exclusive use of the addressee(s). If you are not the intended recipient, you
are hereby notified that any dissemination, distribution or reproduction of
this communication is strictly prohibited. If the intended recipient(s) cannot
be reached or if a transmission problem has occurred, please notify the sender
immediately by return e-mail and destroy all copies of this message.
Thank you.
|