Would a half tank of 87 octane gas cause the "Restricted Performance" warning on 1999 Jaguar XK8

If that does not cause the warning to appear what could be the problem

by in Detroit, MI on March 15, 2013
2 answers
ANSWER by on March 15, 2013
if i remember correctly, jaguar usually runs a higher octane fuel. it has something to do atmospheric pressure inside the combustion chamber. it may cause the sensor to over react. shouldn't be a prob. but recommend upgrade air intake to higher air flow system if using a lower octane fuel. even just a high air flow filter.
ANSWER by on March 16, 2013
Should not cause warning. I would have it checked out asap so not to do more damage if there is a simple problem now. Call 313-562-7022 or schedule on the web at StansGarage.net. We will be happy to help you out. Larry

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