aschardt

#1024 for a 67 F with Turbo. 201 Window upgrade, stec autopilot replacing the wing leveler.

Hey everyone. We'll it happened again! nearly 20 hours after the first episode, I suffered an exact repeat of the first clogged injector, only this time I knew exactly what the problem was. Put it in the shop and it was not only the exact same cause, but the same injector! Ok, now this is wierd. This mechanic (different one than first time) thought it was coming through the induction line. What could be breaking down to cause this? I'm planning a long flight in three weeks and want to get this one fixed now! Any ideas? We're going to remove the induction lines to the GAMI's and let them sit in solvent for a while. Maybe someone used a sealant at one time? ???

I had my 67 F model done by Lone Star Aero and had a great expireance. I was pretty sure I was going to buy the airplane so I had them do a full blown 100 hr. annual along with a tube inspection. Even though I purchased the plane from a dealer on the same field and was a little nervous if there was conflict of interest there, after talking with the owner of the shop he assured me that they would be completely objective. Also had a prebuy written agreement that the seller would pay for any items deemed "airworthy" items. I covered the annual and the non airworthy items. Turned out they found nearly $8000 worth of airworthy items and the seller covered all, no questions asked. Clearly the shop was objective and the seller honest. Been happy ever since!

I get the strobe pulse in my Bose X's too. I have a PS Engineering 1000II intercom. I think it's a grounding issue but it's not all that loud for me so I haven't pursued it. -Aaron

Well guys, we found the culprit tonight. Pulled the fuel filter and it was clean, no debris at all. Pulled the injectors and low and behold the #2 injector was mostly clogged with something. Had to blow it out with an air compressor so we never got to see what it was but since it was post filter it's not likely to be a piece of tank sealant. My best guess is perhaps a piece of rubber from the short hoses that feed the air to the injectors. The rubber looks good and does not appear to be breaking down, but perhaps it was just a piece that was hanging on and for whatever reason decieded to let loose. Anyway, we ground ran it and it's back to it's old self, no hiccups at all. Thanks for the input everyone! -Aaron

Hmmm. At that last annual they did remove some sealant in the tank to repair a slight leak. The tank was flushed, but could be some sort of filter blockage perhaps. I assume there is a filter prior to the injector manifold? Is this easy to check?

Today I tried to take my sister and soon to be brother in law for thier first GA flight. Got the plane out, started normally, after warm up, I ran it up to 2000 rpm and checked mags, prop, etc per checklist, no problems. Got out on the runway, normal throttle up and about 2200 rpm the engine just "fell apart". Ran terribly rough, RPM couldn't get abot 2300 or so, MP wouldn't go over 23 or so. (1633' elevation) Obviously aborted the takeoff and cycled everything I could think of 5 times or more. Mags checked out, fuel pumps good, fuel pressure good, oil pressure good, temps good except for a slightly higher #4 cylinder EGT, everything else normal!?! The engine has 1050 hours SMOH and the plane is 8 hours out of an annual which pulled the #4 jug for a broken ring. Last flown for 2 hours 3 weeks ago, ran smooth, no indication of any problems. It has been hangered since then. No water in the fuel, sumped fuel, looks normal. Engine runs GAMI's. Throttle back to under 2000 and it runs completely normally. I've never had engine issues before, how can a $30,000 engine decide not to run one day?!!! Anyone have a similar issue? Any ideas. The A&P will come to check it out next week, but this is frustrating. Thanks! Aaron

Hello, I have a '67 M20F with the Ray Jay Turbo, Manual Wastegate on it. I have been noticing an increasing amount of friction on the wastegate controller vernier control knob. It takes several pounds of pressure to push the knob in. Also the wastgate is very sensitive, push the controller in three inches and we get no MP increase. Then, the next 1/4" results in four inches of MP. Very easy to overdo it. When its on the ground and you push the knob, it is rough and sqeals like steel on steel. Not comforting. Anyone else have a problem like this and does anyone know who to take this turbo to for overhaul or repair? My A&P is reluctant to do it as he has very little turbo expiriance. Thanks! -Aaron