Sean S

Cleaning all the injectors produced a good ground run and more even EGT, no more than 50 degree spread at full power. No flight today in Memphis with the bad weather and hail! Maybe tomorrow. Sent from my iPad using Tapatalk

Picked a tube up at my local shop, Linda Lou on Monday. She has one more if anyone needs it. The tube will shelf life out before I use it all!

Induction looked good, plugs ohmed out to 884 and 992, i think that is good, I'll check the board as I know I saw the resistance somewhere as 800-1200, injector was dirty and the hole was about half sized. Ultrasonic cleaned injector, looks great. Did not put it back together as I need some fuel lube for the injector and spark plug thread lube. Back to work tomorrow night so I might not get to fly till next Sunday or Monday. Sent from my iPad using Tapatalk

Thanks for all the suggestions. I am headed to the airport. Going to check induction security, pull spark plugs first and check resistance/wear. If no finding there, I will pull the #1 injector. I'll let you know what I find. Will take it all one step at a time until I find a fault.

Ok, I. Did leave out some info. Number one was around 1460, the rest were around 1350. Thanks for helping me out! Sent from my iPad using Tapatalk

I will try it on the ground at power and see if I get the same results. I don't want to fly her until I get this solved. Definitely will look at spark plug resistance and test that. Sent from my iPad using Tapatalk

I will give it a shot. You think I could take plugs from a different cylinder and just swap them out? I do not have any data except what I originally posted. High EGT on number 1 that did not previously exist until this event. When leaning at cruise he vib starts after only a little bit of movement and gets progressively worse. Sent from my iPad using Tapatalk

Good advice. I just changed the fuel pump then had this problem. I'll drain and clean the gascolator as well. Sent from my iPad using Tapatalk

EGT was about 110 hotter than the rest. I was able to lean a bit before it started to vibrate getting progressively worse the more I leaned. I see the EGT as abnormal as my experience thus far has been no more than 30 degrees between all four until the vib started. Sent from my iPad using Tapatalk

Thanks Neil! appreciate the feed back!

Last flight out after leveling off for cruise (3500ft) as I was pulling back mixture to lean, the engine started to vibrate. When going back to near full rich the vibration subsided. The digital EGT showed #1 around 100 to 110 degrees hotter that the other three. Pulled the plugs and they looked good, no oil and normal color as would be expected for proper burn. In looking around here on the board, my search turned up what points mostly to a clogged injector. Will be pulling the injector probably Tuesday and see what I get. In the mean time, was looking for thoughts on this issue. Up to this point the engine has run flawless and smooth for the 40 hours I have owned her! I do not have any type of engine monitor except CHT which was fine, and four position digital EGT. The run up on the ground was a 50 RPM drop left and right MAG.

So far it has been no more than a month and only due to maintenance issues I was tending to.I sent out the DG compass for overhaul. The altimeter failed, and most recently my boost pump started leaking from the shaft seal. I do feel a little jittery if I go more than three weeks. I always take my time and do a thorough pre-flight and departure brief out loud to myself.

GUMPS 3 times. Mid field, abeam the numbers and final.

I budget 12k USD a year. I just took my fixed expenses plus figured I would average 60 hours a year. At that budget it is $124 USD an hour total, fixed and variable expenses. When my insurance goes down next year due to experience, I will be able to fly more hours for the same 12k, and my per hour cost will go down as my flight hours go up. I hold an A and P as well and can do most of my own work. If I run out of the 12k before the year is up, no flying.

A hand operated vacuum would have helped in a pinch. 1-3 inches on the tank vents will help keep the spillage to a minimum. The best alternative is the empty the tanks. Good that you got it done and all is well!

Nice work, thanks for sharing!

The real trick is to stop shopping once you have picked a plane and brought her home!

...and I did not know!

AFAIK every aircraft has a tach. Not every aircraft has a hobbs. Go with tach time for maintenance.

To do the install IMHO you may also need to perform an electrical load analysis to show that the system does not get overloaded when using these lights.

Got the pump out. It was overhauled on 2001. Going for an overhaul and see how long that lasts.

Now it's down to Aeromotors $400 rebuild or Weldon for $1236. Decisions decisions. I think I'll take the pump out and then decide! This place is a wealth of knowledge!

Looks like I'll be gettIng an overhaul on my Duke fuel pump then!

Monday went to Kentucky Dam State Park. It was a lonely, empty place with a very nice runway. The numbers on the runway did not match the AF/D or the airport signs! I guess that is coming as the runway markings looked new.

Looks like I have the same problem on my '75F. Fuel is dripping from pump fitting to make about a 3 foot puddle! Turned the gascolator to off and drip stopped. I'll take the pump out in the morning. Does anyone know if this is a Dukes or Weldon? Can't see the data on the plate.