Does anybody know what part is interchangeable with the
DAC11520 for the Marelli cars? Lots of info in the archives
on Lucas ignition and the GM part that fits, but very leads
when it comes to the last of the V12. The OEM unit is NLA
and very, very expensive. This might be my problem, but I
am not sure and do not want to swap parts for no good
I’ve contacted some off-line already and got help, yet, the
first start of the day is still problematic (perhaps related
to the temperature is dropping, summer time seemed OK).
I need to crank long (7-10 sec), sometimes it dies and
flashes the FF77 code (lost engine speed).
Runs very well once awaken. Warm start and idle are fine
(barely noticeable shaking on P and N, but no exhaust
popping), no error codes. Did a long trip in the summer,
got 18 MPG, passed emissions in September.
What I’ve checked already:
-AAV was cleaned and idle speed set.
-Throttle plates cleaned and confirmed adjusted to 0.002’’.
-All injectors click.
-Spark plugs are new (1000 miles), new wires.
-Sparks from both coils are strong.
-Revs easily to the red-zone.
-The CTS which should provide fuel mixture enriched is OK (2
kOhms cold, drops to 200 when warmed).
-I also looked at the vacuum tube that goes to the ECU in
the boot – it holds vacuum and is not blocked.
-vacuum tube to the Marelli unit in the passenger boot also
I have not checked the TPS voltages and the microswitch at
the throttle plate though. The ignition amps are not checked
As some of you know, I became a Dad a few months ago and
since then have not driven the car much. Aside from the
obvious hypothesis ‘‘bad gas’’, what else I should be thinking
PS BTW, when I was checking for vacuum leaks, I forgot to
reconnect the vacuum tube to the ECU in the boot, yet, the
engine started and ran ‘‘normally’’ …? How is that possible?–
'95 XJS V12 6.0L, saphire/tan
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !