C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Cruise control and mpg readout

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Old Oct 13, 2018 | 12:15 PM
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Default Cruise control and mpg readout

Suddenly my cruise control stopped working. And also my mpg readout. Is there something in the cluster that could cause this?? 89 corvette automatic

also sometimes even though it’s an auto car my shift up light comes on randomly. It shuts off if I shut the car off.

Last edited by kitttransam; Oct 13, 2018 at 12:19 PM.
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Old Oct 14, 2018 | 01:29 AM
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I always wondered how the fuel mpg worked, I think it is based off of vacume. One of your vac hoses may have broke and affecting mpg gauge.
When I had a leak my mpg would not go to 0 when I stopped so I new something was fishy.
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Old Oct 14, 2018 | 04:28 AM
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Lmao. I think I’ve been working too much. I still had my ALDL cable hooked up. That’s why it did not work.
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Old Oct 23, 2018 | 01:35 AM
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Yes, The 160 baud ALDL-data wire is used to send data from ECM to early dash. When an ALDL reader is used you loose MPG data on the dash.
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