Rick Edwards 20 Posted April 24, 2013 Report Share Posted April 24, 2013 Greetings O knowledgable ones, On Saturday we were in the way to Donnington and all was fine for the first 100 miles. Then the engine started getting lumpy when the pedal was applied. It got progressively worse and we decided to about turn and head for the services. On applying the freescan I have been presented with error 44 and it suggests there is a lean mix on the exhaust. Tbh I think it's rich not lean, but.... A) would a failing O2 sensor give this kind of lumpiness ? B) does it mean the O2 sensor that is near the turbo? Thanks as ever in advance R Quote Twitter @radioRedwards Link to post Share on other sites
Vulcan Grey 251 Posted April 24, 2013 Report Share Posted April 24, 2013 A. Yes the O2 sensor could cause a running problem like that. Basically the ECU is getting a signal that makes it think the engine is running lean, so its trying to compensate by adding more fuel. It may or may not be lean, you should log some data on freescan or espritmon and send it to me. Also you should check the wiring. B. Yes that is the O2 sensor in the exhaust pipe right next to the turbo. Quote Travis Vulcan Grey 89SE My Lotus Photo and Projects Album Link to post Share on other sites
mr.oogieboogie 121 Posted April 26, 2013 Report Share Posted April 26, 2013 Pm sent rick Quote It's Oogies turn to boogie Link to post Share on other sites
ajheath 100 Posted April 28, 2013 Report Share Posted April 28, 2013 While'st running Espritmon today to determine which ABS sensor is kaput I also noticed a code 44 in the log. My O2 sensor is less than a year old and the value of the O2 sensor doesn't drop below 0.5 as recommended. Could there be another reason for a code 44 or is it just the O2 sensor? Car runs fine. Quote Link to post Share on other sites
Vulcan Grey 251 Posted April 28, 2013 Report Share Posted April 28, 2013 bad wiring Quote Travis Vulcan Grey 89SE My Lotus Photo and Projects Album Link to post Share on other sites
ajheath 100 Posted April 29, 2013 Report Share Posted April 29, 2013 I'll give it a clean, however this is the Delco sensor, which I know after reading more is not as reliable as the OEM part, so I will run another test to see what the values are. Quote Link to post Share on other sites
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