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Registered User
Join Date: Apr 2012
Posts: 6
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Fuel Octane
What type of fuel should I be running in my 76 2.0L fuel injection. I have been using 87 octane with ethanol and just put in a tank of 91 octane without ethanol. Car ran fine for about 10 miles then started running like crap. Wouldn't idle down and backfired a few time. Any thoughts?
Last edited by greg58; 09-05-2014 at 07:02 PM.. |
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09-05-2014, 06:55 PM
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914 Geek
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The car was spec'ed for 91 RON, which is basically 87 AKI (which is what our pumps are labeled in here in the US).
Going to a higher-octane fuel should not cause any problems. It may be possible that the ethanol in the other fuel had been masking some other problem, but I think it still more likely that the poor running is a coincidence. Two things to check if the idle is too high: Vacuum leaks and ignition timing. If you have any air leaks, the D-jet system will idle too high. Likewise, if the ignition timing gets advanced the idle will go up. --DD
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09-06-2014, 12:02 AM
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74 Porsche 914 2.0 
