Power loss and engine misfire

Hello, dear Lupo community,

"For some time now, I've occasionally experienced an issue where my Lupo 3L, manufactured in 2003, stalls when I release the accelerator. It often takes several attempts to restart it. I initially thought it might be the mass airflow sensor (MAF), as that error code appeared. After replacing it, the error disappeared, and the check engine light went off. However, after about 100 km, the error has reappeared, along with a new one. I'm wondering if it's now related to the EGR valve, and whether I should replace it or if cleaning it might be sufficient. Honestly, I suspect there's an air leak somewhere, but I haven't been able to pinpoint it." I checked all the hoses from the top, looking for any leaks or signs of damage, but I didn't find anything. I also measured the AGR valve (N18), and it seems to be working correctly. I was hoping to get some help and advice on what I should look for next, or what else it might be caused by.

Sincerely,

Hello,

Sorry, foreign VCDS customers without a support ticket must stay out.

This is the support forum for Kaufmann (RKS) customers. Non-customers, please submit a support ticket to resolve your issue.

Best regards, Rainer.