1991 V12 crank, no start. Pump working.

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06-03-2014, 05:11 AM

jaguarlars

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1991 V12 crank, no start. Pump working.

No spark. No ticking injectors. I have 12V at coils and fuelpump working. Water temp sensor ok. Any ideas?
Cars is 1991 US with Marelli.

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06-03-2014, 06:51 AM

Doug

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Simultaneous no spark and no injector pulse sounds like a crank sensor problem. There are two. Most guys replace both at once but others will chime in on that.

Cheers
DD

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06-03-2014, 06:54 AM

jaguarlars

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I know this is a common fault on six cylinder, but never heard about it on the V12`s. Anyone knows if this is a common problem?!

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06-04-2014, 03:36 AM

jaguarlars

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Crank sensor working.

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06-04-2014, 08:54 AM

smachell

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I have a 1989 that I replaced the Marelli rotor on, only 1/2 getting fire.
mine has the high /lo rotor, 6 fire on top, 6 fire on the bottom.

apparently common problem with the rotors.

Steve.

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