1981 Jaguar XJ6 jaguar only running on 3 cylinders after ju

1981 JAGUAR XJ6
116,500 MILES • 6 CYL • 2WD • AUTOMATIC
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DMBAUER
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I have a 81 jaguar xj6 4.2L strait 6 with dual over head cams in witch i restored i redid all the fuel systems and redid the whole car put many new parts on i have compresion spark and sufficient fuel pressure. i had the car running great i drove over 150 miles one day parked the car did absolutly nothing to it and started it the next day i was only running on the rear 3 cylnders the front 3 were no longer pushing out power or getting hot so i believe they r not running for whatever witch reason. please i have tried everything.
Oct 18, 2010 at 9:06 AM
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MERLIN2021
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First step is a compression test. Test all cylinders.
Oct 18, 2010 at 11:54 PM
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DMBAUER
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have done compression test long time ago shortly after my engine started running like this. my compression is great on all six and very even
Nov 5, 2010 at 1:30 PM
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MERLIN2021
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OK compression is good, so that rules out a mechanic issue, so test for spark and fuel when the problem occurs, one of them is missing.
Nov 6, 2010 at 9:44 AM