I suggest PMDG provide a startup situation that all of us should load and leave unchanged, and then test fly. This way, everyone would be testing under the same basic conditions.May I add that I appear to be one of the lucky ones who never had anything like that happening since SU1 (no. of fuel selectors reset to 1). Before SU1, fuel imbalance occured on a frequent basis.-------------------MeatWaterProfessional Audio 4 Entertainmentwww.meatwater.com

Robert,I have found in FS9 if I press pause while ammending the fuel via the (alt) menu I don't have any imbalance problems. I am running SU1.1.I haven't tried it with the centre engine yet but will give it a go over the weekend.Still have a problem (no comments), with the APU draining the right wing tank if left on (I know I'm not supposed to)cheers,Travis

No flameout, guess thats because I stated with and empty centre tank so it may or may not have happend.1) What version of FS are you using?FS9 (2204)2) Do you have "unlimited fuel" deselected? (I ask because after tens of hours of testing in FS9 I realized I had this box checked....duh)Yes it is, but I don't see the conection to the excessive single side fuel consumtion problem with this.3) Have you manually set the fuel valve within MSFS before/during your NG flight?MSFS fuel valves were not touched prior or during the flight,4) Which fuel menu did you use to set your fuel leve?Only know of the MS one and that was what was used5) What was the fuel level in each tank approximately at Takeoff...70. 0, 70 (Percentages each tank Left center and right respectivley.6) Had you conducted ANY crossfeed operations during the flight?No7) Had you operated the APU at any time during the flight? Was it On/Off when the flamout occurred?At the start prior to engine start up. Shut down shortly after take off.8) Did you experience IMBALANCE, FLAMOUT or both?IMBALANCE only, see my remark at the start of this email.At landing the tanks were 54.4, 0 and 27 percent full, again L. Center and right resectivley.9) Please tell me you are running SU1-1, right? ;-):) Yes the latest upgrade was installed.Has it occured to anyone that there is a little man siphoning the fuel out of the tank. - The question becomes. "Where is it going?"Hope you sort this soon else I'll shoot him when I catch him and I dont want to be accountable for that.

1) What version of FS are you using?fs20022) Do you have "unlimited fuel" deselected? (I ask because after tens of hours of testing in FS9 I realized I had this box checked....duh)NO3) Have you manually set the fuel valve within MSFS before/during your NG flight?NO4) Which fuel menu did you use to set your fuel leve?Create flight FS2002 menu5) What was the fuel level in each tank approximately at Takeoff...anywhere form 4 to 2,0006) Had you conducted ANY crossfeed operations during the flight?Tried it with and without, Flameout occurs anyway7) Had you operated the APU at any time during the flight? Was it On/Off when the flamout occurred?NO, off8) Did you experience IMBALANCE, FLAMOUT or both?Flameout9) Please tell me you are running SU1-1, right? ;-)YES

I was just thinking if anyone has these problems when going throught the Advanced tutorial as if that was used by everyone, then everyone should be operating under the same conditions, which is something we need to be doing as someone else has said.I went through this tutorial yesterday and had NO imbalance. Well, that is a lie. To be exact I was 50 light, on the RHS due to the APU at startup. I ran the RHS engine taking the fuel from the left hand fuel tank and balnced the two exactly. The balance at the end of flight was exact. I feel that its not the crossfeed that is the problem but that APU, but I cant work out exactly under what conditions it is happening.Just thought it strange you said you had it and you were going through that tutorial.

HiI am new to the 737 so using the advanced tutorial by T M metzinger, and following it to the letter.. guess what at 33000 feet just as I was reading about setting up a hold, after many messages from FS about low fuel, ( the centre tank was nearly empty, but the wing tanks were nearly full) as the centre tank emptyed, both engines flamed out, I managed to do a full restart, after turning off the centre tanks pumps, and all continued as normal ( after a short drop in hight :))I have done the same flight many times now and discovered this, everything works fine, if when the centre tank gets low (even if you are down to your last 50lbs of fuel) and you turn off the centre tanks pumps then no problems, only if the pumps are left running does the program get confused and flame out without drawing fuel from the wings.APU running only seams to drop the wing tank, and has no effect on the flame out (it does help in starting them again though :))in answer to your questions:1) What version of FS are you using?FS9 ACOF2) Do you have "unlimited fuel" deselected? (I ask because after tens of hours of testing in FS9 I realized I had this box checked....duh)Yes3) Have you manually set the fuel valve within MSFS before/during your NG flight?set before using the menu as per the tutorial (although I have found that I have to take a little less)4) Which fuel menu did you use to set your fuel leve?aircraft:fuel5) What was the fuel level in each tank approximately at Takeoff...wings 96% centre 20.2%6) Had you conducted ANY crossfeed operations during the flight?no7) Had you operated the APU at any time during the flight? Was it On/Off when the flamout occurred?off when flame out occured, used APU at start for engine start but switched off either before take off or during clime out8) Did you experience IMBALANCE, FLAMOUT or both?left tank low, expected due to APU running during pre flight, flameout when centre tank runs dry and pumps working9) Please tell me you are running SU1-1, right? yesHope all this helps Duncan

***SORRY*** Just reread the opening post and saw that this is #1 on the list. Nevermind. (oops)This is probably a known issue, but the only time I get a fuel imbalance is if I try to fill the tanks with the APU running. In this case, all of the tanks will fill except the left wing tank. As soon as the APU is shut down (and finishes its cool down period), I can fill the left tank to the desired level.Warren Fischer

>2) We do not use the MSFS default fuel system logic because it>does not work effectively for a Boeing airplane. (great for>Cessnas tho...)Just an idea here: what happens with the MSFS fuel system logic, while you use yours? I guess that it continues to live its life on its side and will consume fuel from the tanks it thinks is currently active. I don't know if you use your own tanks or if you use MSFS's tanks, but in the latter case, I can imagine that at least one tank is consumed by both your own logic AND MSFS's logic.Then, about flameouts : if MSFS thinks that the tank currently feeding the engine is empty, it would seem normal to me that it would cut an engine.Eric.

Robert,today I did a longish flight from egll to lpma and ran the apu for the overwater section as per etops rules, and sure enough I had the same imbalance problem, on the right tank. This is the first time I have run the apu in the air, and it is the first time that I have encountered this problem. The crossfeed worked fine though, so by the time I landed the imbalance was down to about 500lbs. Cheers,anthonyp.s. great plane, have just recieved my copy of Mr Bulfers fmc guide so am looking forward to su2!

I just completed a nice short flight from KABQ to KDEN without any major issues. I did notice that at the gate my right tank was 1000 pounds less than my left tank. . .so I guess I'll send my info too just in case it may help.1) What version of FS are you using? FS20042) Do you have "unlimited fuel" deselected? No. :D3) Have you manually set the fuel valve within MSFS before/during your NG flight? Yes. . .only on attempting to start left engine. Right engine starts with fuel selector switch properly.4) Which fuel menu did you use to set your fuel leve? MS from the main flight creation menu.5) What was the fuel level in each tank approximately at Takeoff... 93% in each wing, 0% center. 6) Had you conducted ANY crossfeed operations during the flight? No.7) Had you operated the APU at any time during the flight? Was it On/Off when the flamout occurred? Yes. . .as a matter of fact, while descending thru 13k I started it up. . .8) Did you experience IMBALANCE, FLAMOUT or both? Imbalance only. . .and only noticed it at the gate. ~5100 in left tank, ~4200 in right tank. APU ran for approx. 15 minutes during flight.9) Please tell me you are running SU1-1, right? ;-) Yes. ;-) back at ya!BTW, I LOVE this little plane! Thanks for the beautiful work!Regards,drew