My 89 RS with the 5.0 V8 automatic when accelerating (at least once or twice a day) will throw a CEL and give me hardly any power. Like geo metro power. If I pull over and turn the car off and back on. The CEL goes away and I have all the power back. Any ideas on what this is? I cant pull the code because I have to shut off and turn on the vehicle, but when I do that the light/ code goes away.
GeneralDisorder
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Sep 13, 2025
Get an ALDL cable or scan tool and monitor the malfunction flags. It's anyone's guess what code you are throwing.
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ironwill
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- Join DateJan 2008
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- Car1986 IROC Z
- Engine5.0 TPI
- Transmission700R4
- Axle/Gears3.23 Posi
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Quote:
Have you actually attempted to pull codes? There may be one or more stored in memory; the cost to find out is a paper clip.Originally Posted by Rayzorees
My 89 RS with the 5.0 V8 automatic when accelerating (at least once or twice a day) will throw a CEL and give me hardly any power. Like geo metro power. If I pull over and turn the car off and back on. The CEL goes away and I have all the power back. Any ideas on what this is? I cant pull the code because I have to shut off and turn on the vehicle, but when I do that the light/ code goes away. https://www.obd-codes.com/faq/read-g...codes-free.php
Quote:
https://www.obd-codes.com/faq/read-g...codes-free.php
Originally Posted by ironwill
Have you actually attempted to pull codes? There may be one or more stored in memory; the cost to find out is a paper clip.https://www.obd-codes.com/faq/read-g...codes-free.php
I just found out this trick to pull codes! I have code 43 which is either my knock sensor or ECS. Another post had the same issue. Turns out o cant run 91 octane as it causes my engine to ping setting off my knock sensor. I'm running 87 now and it runs 10x better.