Re: [DML] Hot exhaust

["David Teitelbaum" <jtrealty@xxxxxxxxxxxxx>]

Since the cylinders are leaning out under boost air leaks are less of
an issue. My guess is some kind of quirk causing cylinders 1 & 2
injectors to be metering less fuel than required. I would swap them
around to see if the problem moves or measure them somehow against the
others to be sure they are balanced against the others. Depending on
the system they may be indidually calibrated so you can put more or
less in each cylinder by modifying the fuel map. Pulling the spark
plugs will confirm that the cylinders are running lean. Meausuring EGT
from each cylinder is another way to tell. Before running the motor
again I would do a compression test and leak-down test to make sure
each cylinder is working and there is no damage. I would not suspect
an ignition timing problem since the other cylinders seem to be
running alright. I would recheck that there is no mistake with the
firing order and that the wires are not cross-firing between 1 & 2.
David Teitelbaum
vin 10757



--- In dmcnews@xxxxxxxxxxxxxxx, Martin Gutkowski - DMC Ltd
<martin@...> wrote:
>
> Nick is running an EFI/Electronic ignition setup that means that air 
> leaks are a moot point unless huge because he is running speed density 
> metering. Ditto distributor mods - he isn't running mechanical timing. 
>





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