AEM 30-4110 Bosch LSU4.9 Issues
What am i missing here?
I purchased an AEM 30-4110 to aid in tuning my truck and have gone through 3 sensors in about 2 months. I contacted AEM after the first failure and they had me do some diagnosing before they ended up sending me a replacement sensor under warranty. During this diagnosing AEM verified that my wiring is correct, the sensor is mounted in a good position at an acceptable angle and they claim that the testing I did proves that the controller is not to blame. In the meantime I purchased a genuine Bosch sensor from a reputable source. The 2nd sensor failed in the same fashion today while trying to tune, it lasted maybe 2 weeks with very limited run time. I installed the replacement that AEM sent and it lasted approximately 2 miles. I even installed a switch in line on the power to the unit to prevent the unit from commanding the heater until the truck is running. (so the heater wont run when I have key on- engine off) Im pulling my hair out at this point, when the sensor works it appears to read correctly but then i will be cruising at a fixed rpm and the reading will go lean until it reads "---". Im ready to bail on this system all together and stomach the $200 loss but im concerned because it seems that every wideband seems to use this same sensor. Do any of you guys have any other ideas of what i may be doing wrong?