SOURCE: audi a3 1.8t 99 keeps cutting out and backfires
you may want t check for vacumn leaks to the MAP before you go to the trouble of taking the convertor off also check the MAF i have a feeling the issues you are experiencing are more sensor component related than is catylitic convertor also the air idle motor in the injection system can cause the same problems if the air idle valve is stuck or the ports in the intake manifold are clogged
SOURCE: My 99 Crown Vic acts like it isn't getting gas
Was the fuel tank drained and flushed when the fuel pump was replaced? By this time it will have collected a lot of junk and gunk. Without cleaning the tank, the fuel pump will simply clog and stop working again.
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