Ok, since there has been a scary lack of activity on the list as of late (no, not just blamable on Oshkosh), I am certain y'all remember that I lost my engine over the first airport I flew to from my home airport.  I have been there the last three months working on a couple of issues (yeah, life tends to extend time requirements).  We determined the engine quite due to some gunk getting into the fuel rail, blocking the return vent in the Mistral fuel rail.  I have cleaned and modified the fuel lines a bit and hopefully this is in the past.  Also, since my oil pressure was running lower than I felt good about, I installed the higher rated oil pressure valve (and inserted two small washers on top of the spring in the front housing). Also, I removed the front oil cooler used for cabin heat from the oil system greatly simplifying my oil lines. (I will likely convert cabin heating to coolant heat if I ever get flying right) The oil pressure is better, going down to around 30 at idle and up to the 60's or more when at power.  Seems it should be higher with the higher pressure regulator (80lbs, I think) but it is now high enough that I am not nervous to run the engine. This mod included a short brass tube to better support the front housing oil ring which I have had consistent issue with. 

Enough background.

I've gotten the engine starting predictably and I am able to run it up with the prop to over 6000 (IVO in flight adjustable at fine pitch. Don't recall MP), however, I cannot seem to get it to run smoothly at lower RPM's/Idle.  It seems to be missing consistently.  It sounds okay as power increases but I may not be able to hear the miss when it revs up.  Fuel pressure is at about 38lbs.  I have used the EC2's test feature and find all the coils putting out power and I replaced all the spark plugs yesterday.  I can hear the click of the injectors when I press the program switch (but, I could not get them to fire in Mode 1 test...but it seems that there may have been a change in the way this is done after one of my units upgrade but I was working with an older EC2 manual...the one that came with the unit and not the one for the latest update I received).

I am getting similar results for both A and B computers.  I reset A to factory defaults since I figured it would be best since I changed some fuel line runs.  I have left B as it was when I was last flying.  I am thinking this minimizes the EC2 as the culprit.  Mixture does not seem to make much difference.  I do have separate switches for both primary and secondary injectors and coils.  I am not getting any great improvement in any combination of on and off combinations.

Since I am home preparing for a Colonoscopy tomorrow (yeah, as y'all who have been here know, I am not really able to head out to the hangar...isn't being over 50 fun), I have been searching the archives.  The problem is our archives are a bit hard to search.  Not only is it difficult to use the correct term, our threads seem to drift a bit. :-). 

Temperatures on oil and coolant are reassuring.  I can get my coolant numbers down from 200 when stationary for a while to the low 180's just from a moderate taxi speed.  Oil has been below 180....actually even lower if memory serves.

So, once again I reach out to our collective.  Even with Osh, todays tech may allow some to comment and provide direction.  Heck, maybe y'all can discuss in person........;-)

Chris

Itching to get my bird back home and save the extra $250 a month for a second hangar, but not wanting to prematurely launch....oh, and actually be flying again.