AlanEss Posted August 18, 2023 Share Posted August 18, 2023 My a4 has started throwing too lean error Has got worse over time, now getting dead patches as I accelerate until turbo cuts in. Has anyone an idea what to check for? Quote Link to comment Share on other sites More sharing options...
Steve Q Posted August 18, 2023 Share Posted August 18, 2023 Is it worth you checking the maf, lambda sensor and coil packs/spark plugs first. Quote Link to comment Share on other sites More sharing options...
AlanEss Posted August 24, 2023 Author Share Posted August 24, 2023 I have done the suggested checks and cleaned the MAF with contact cleaner. Now runs more smoothly but still showing same error. This happens miles after the engine reaches operating temperature. I haven't found any leaking air pipes so far. Is there anything that is temperature sensitive? Quote Link to comment Share on other sites More sharing options...
Steve Q Posted August 24, 2023 Share Posted August 24, 2023 Could there be an issue with leaking boost pipes? Quote Link to comment Share on other sites More sharing options...
A4 Clueless Posted June 10 Share Posted June 10 I have just started getting the same issue with my 2007 cabriolet. I installed a new MAF and the engine still “pulses” on cold idle and throws up the running lean issue. Exhaust starts popping and there is a “thud” sound from the air intake. However, if i unplug the MAF, the car idles perfect and the pulsing, thuds and pops disappear???? At the moment I am running the car without the MAF plugged in until i can figure out why it doesn't work with a new MAF installed. Would be interested to see how yours runs if you unplugged the MAF? Following this tread to hopefully find some answers. Quote Link to comment Share on other sites More sharing options...
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