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Hi all, so i have a 90 gli with the original Kjet system. About a year ago i started noticing that at random times, the CEL pops up and the car starts running very lean, almost bogging out when i engage first gear, and struggles to get up to speed. I was wondering if anyone has had this issue. I heard it can be the fuel pump if its buzzing, but this only happens at random times, namely when i really step on it. Then i restart the car and its fine. Any help would be appreciated! Thanks!


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What makes you think it's running lean?

Try disconnecting the O2 sensor. If it shorts out, it will cause the engine to run rich and bog out.

Usually O2 sensors seem to short out during their warm up phase. O2 sensors do have a life span so it's always a good idea to replace them every 60k or so.
 
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