So far only found two of us with the problem and mine is a T-4 and I think gates98 is also.My pump is above the tank but if that was the cause seems like this would be an issue with all T-4's.I did move the filter past the pump from before the pump as was suggested but still have the problem.My next attempt to resolve this issue will be to replace the battery terminal clamps,install a better ground,and replace the two 02 Sensors.Wont be able to do that until next weekend,got it in garage in Havasu and thats my next planed trip.