Hi Paul, I also have a flat spot off idle. When I take off it hesitates and sometimes I even get a cough out of it. Did your ever have that little hicuup? Funny thing is it is only from a take off. I can be in a higher gear just idleing along and gun it and it has no flat spot at all? Anyone with any ideas?
I am not sure, but what you are describing sounds like the 'classic' hesitation problem the LTD/SEis all have. Mine does what you describe even after it is now 'fixed' - if you crack the trottle with a light load I sometimes get that hesitation for a split second. I don't usually get a cough out of it, but it has happened. I think Bob's explanation was correct - I don't think the FI system can react fast enough under those conditions and it takes it a split second to respond.
I think when you put it in a higher gear and then roll on the throttle you are unkowingly twisting the throttle more which gets past the small throttle opening where the problem occurs.
If what you are describing is the hesitation that they all have, then it is not a bother to me. It is just a minor thing and never affected the driveability of the wing. The other hesitation that I finally fixed on mine was more of a 'bog' where the thing would just lose power for a second or more (which is actuallya long time) and then 'catch' again. It was more than annoying - it was dangerous. I am glad I was finally able to fix it.
The trouble is, unless we could all ride each others wings, we don't know if you problem is the problem they all have or if it is something weird like I had with mine.
There were many times I wished I could have got Bob on an jet from Oregon to Ohio to help me with mine.
If your problem is severe, then you will have to start troubleshooting. The best thing to do is to search this board for anything related to the LTD/SEis and you will find bits and pieces of info to help you.
I would probably startby checking the TPS - if ithas a 'dropout'it can cause a big flat spot. Mine hadone and that was part of my hesitation problem. Beyond that, it takes a lot of trial and error unless you are gettng theFuel System Warning light and/or LEDslit on the ECU.