Hi Jag Lovers,
I’m new to your list, and for fifteen years have been the second owner of a
low mileage 66 OTS. I’ve enjoyed about 15k miles of trouble free motoring,
except for blowing poorly remanufactured “Made in England” radiator hoses
(no fabric reinforcement!).
I’ve usually mixed a few gallons of racing fuel or aviation gas to avoid
pining when the engine is hot and under full throttle. I’ve also retarded
timing to 4 degree BTDC to battle this problem.
Recently I had the engine serviced with a “MotorVac” process, using SUN
equipment I believe, because I assumed a lot of carbon had built up in the
head. Unfortunately the pining (pre-ignition) is back.
Have others experienced this, and what cure has been found? My engine has a
9:1 head. Could it be that my distributor is the problem? Like weak
advance springs which allow too rapid advance? Its difficult to find
someone who still has an operational distributor machine around. And even
if I do find one, where could I obtain advance springs that are proper and
preferably a variety to tune the dizzy by trial and error. Or is there
someone you listers would recommend to perform distributor tune-up services
including a plot of the final results? Please indicate if I’m on the right
track, or should look yet elsewhere for the cause.
Cheers, Peter
Hi Peter
Have you checked the advance charactoristics of the engine?. You should be
able to see this on the engine with the car running. You will need to hold
your timing light on the marks as the engine is revved up, at certain rpm
you will se the ignition advance change. A lift is a good idea so as to
gain better access. If you cannot do this any competant shop should be able
to do it for you and give you the results. BTW the sun machine should be
able to print out the advance curve for you.
Regards John----------
From: Peter Pleitner pleitner@dundee.net
To: e-type@jag-lovers.org
Subject: [E-Type] Ign. Pinging
Date: Wednesday, June 02, 1999 3:32 PMHi Jag Lovers,
I’m new to your list, and for fifteen years have been the second owner of
a
low mileage 66 OTS. I’ve enjoyed about 15k miles of trouble free
motoring,
except for blowing poorly remanufactured “Made in England” radiator hoses
(no fabric reinforcement!).
I’ve usually mixed a few gallons of racing fuel or aviation gas to avoid
pining when the engine is hot and under full throttle. I’ve also
retarded
timing to 4 degree BTDC to battle this problem.
Recently I had the engine serviced with a “MotorVac” process, using SUN
equipment I believe, because I assumed a lot of carbon had built up in
the
head. Unfortunately the pining (pre-ignition) is back.
Have others experienced this, and what cure has been found? My engine
has a
9:1 head. Could it be that my distributor is the problem? Like weak
advance springs which allow too rapid advance? Its difficult to find
someone who still has an operational distributor machine around. And
even
if I do find one, where could I obtain advance springs that are proper
and
preferably a variety to tune the dizzy by trial and error. Or is there
someone you listers would recommend to perform distributor tune-up
services
including a plot of the final results? Please indicate if I’m on the
right
track, or should look yet elsewhere for the cause.
Cheers, Peter
The distributer is surprisingly easy to work on. One of the first things I do
when I get a new car is to pull the distributer and dissasemble/clean it.
Inevitably the vacuum or centrifugal advance is stuck with gunk and twenty years
of oil/crud.
However comma …That makes it run retarded, whic results in over heating, not
pinging.
LLoyd
Peter Pleitner wrote:> Hi Jag Lovers,
I’m new to your list, and for fifteen years have been the second owner of a
low mileage 66 OTS. I’ve enjoyed about 15k miles of trouble free motoring,
except for blowing poorly remanufactured “Made in England” radiator hoses
(no fabric reinforcement!)… delete