Chip upgrade - JeepForum.com
 
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post #1 of 2 Old 12-24-2016, 07:43 PM Thread Starter
nick117201
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Chip upgrade

Since I have no knock sensor on my 95 Grand Cherokee 4.0 and I am using 93 octane and still have some valve knock, I am thinking about trying a chip upgrade.
Any advice?

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post #2 of 2 Old 12-25-2016, 09:12 PM
222Doc
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that 4.0 should run on low octane no issues. there should be that sensor, a chip that tunes will as well need the same or it wont retard the timing. since it wont feel the knock it will just keep the timing to high. pre ignition will kill a engine. if you cant fix the sensor issue than maybe some sunoco 100

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