atlantaman Posted April 23, 2017 Share Posted April 23, 2017 I have an 05 SD with a Magnason Supercharger installed. (102000 miles now) For the first 2 years and 35000 miles all worked flawlessly but now it is starting to act up regularly and I cant get my finger on the issue. I am getting code alarms for lean readings on multiple fronts p0171 p0151 p0174 p0001 I Have replaced all 4 of the o2 sensors and all was good for 1 month but back to 2xper day having to clear the alarms I have used up 2 full cans of ether trying to locate a vacuum leak but nothing was found at this point I am going to replace the intake gaskets and get a replacement CPU (off ebay-with exchange) and try that. Any suggestions or other ideas????? Quote Link to comment Share on other sites More sharing options...
Chris Posted April 23, 2017 Share Posted April 23, 2017 MAF, bad brake booster diaphragm, intake and throttle body gaskets Quote Link to comment Share on other sites More sharing options...
Jennabear Posted April 25, 2017 Share Posted April 25, 2017 MAF for sure Quote Link to comment Share on other sites More sharing options...
atlantaman Posted May 1, 2017 Author Share Posted May 1, 2017 replaced MAF--no help will replace MAP today too more codes to digest p0332 knock sensor o2 circuit low I am wondering if there is a ground wire or ground loop going on somewhere that is not allowing sensors to work properly??? Quote Link to comment Share on other sites More sharing options...
Jennabear Posted May 2, 2017 Share Posted May 2, 2017 MAP won't help, the MAF is the usual suspect. Since you already replaced it (provided the new one isn't faulty) you should check into vac leaks. Quote Link to comment Share on other sites More sharing options...
atlantaman Posted May 4, 2017 Author Share Posted May 4, 2017 Total weirdness has occurred Replaced MAP and everything suddenly got better. car runs like new, no error codes, and gets 2mpg better mileage................ Quote Link to comment Share on other sites More sharing options...
Jennabear Posted May 4, 2017 Share Posted May 4, 2017 Glad you sorted it out! You probably had a leak around the MAP. Quote Link to comment Share on other sites More sharing options...
atlantaman Posted February 10, 2019 Author Share Posted February 10, 2019 Actually the MAP was just malfunctioning--car ran like new after it but there was no sign on a leak anywhere.. Quote Link to comment Share on other sites More sharing options...
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