I have an xpIO360 with 460hrs, with first flight april of 09.
electronic ignition with plasma 3 on top and pmag on bottom
Just recently I had a situation where no.1 and 2 all of the sudden went up in egt by about 100. This went on for several flights, than out of no where they went back to normal. normal is where cylender 1 at 1330 lean of peak, no2 1380, no3 1332, no4 1335. No2 was always a litttle higher. Than after about 50 hrs no1 and no2 again about 100 higher on the egt. peak would be later as well. Use to be no1 would peak first. now it's no3 peaking first. these are based on 20map and 2400rpm. c/c prop
1 week ago all the sudden no1 and no2 shot up higher, now about 250degrees higher and peak along with it, now no3 no4 is peaking normal and 1 and 2 last, with temps at 1550+.
This is a real kicker, when it first did this I landed looked things over, next day flew again, now everything is just fine. In fact the spread for the dynon lean of peak is .4. AArgh. But 1 and 2 are still about 100 higher.
Than after that flight, 1 and 2 is back to high temps of 250+ over 3 and 4.
This is what I have done.
Switched each mag off and the temps even across the board increase within 100 from each side. No change on 1 and 2 higher temps. engine runs good on single mag
I switched the egt between 1 and 3. That's wiring and all.
now the hot one goes to 3 on my dynon. So it's not the dynon or the probs
I pull all the injectors and clean them, that's with an ultra sonic cleaner and gun cleaning solvent. On top of that I take the injectors from 3 and 4 and put them in 1 and 2. Same thing, 1 and 2 running hot.
I also cleaned the spider.
I checked the clamps and bolts for the air intake tubes.
CHT are normal
oil temps are normal
If I were to close my eyes and not look at the ems I swear the engine is it's old self. That's with running lean of peak with 3 and 4.
trying to figure my next step, I think I've narrowed it down to the engine. I do fear a possible problem with the cam, looks like intake valves for 1 and 2 are using the same lobe.
appreciate all thoughts on this, trying to find the problem, really pulling my hair out on this one.
I pulled the plugs on 1 and 3 and they both look the same.
electronic ignition with plasma 3 on top and pmag on bottom
Just recently I had a situation where no.1 and 2 all of the sudden went up in egt by about 100. This went on for several flights, than out of no where they went back to normal. normal is where cylender 1 at 1330 lean of peak, no2 1380, no3 1332, no4 1335. No2 was always a litttle higher. Than after about 50 hrs no1 and no2 again about 100 higher on the egt. peak would be later as well. Use to be no1 would peak first. now it's no3 peaking first. these are based on 20map and 2400rpm. c/c prop
1 week ago all the sudden no1 and no2 shot up higher, now about 250degrees higher and peak along with it, now no3 no4 is peaking normal and 1 and 2 last, with temps at 1550+.
This is a real kicker, when it first did this I landed looked things over, next day flew again, now everything is just fine. In fact the spread for the dynon lean of peak is .4. AArgh. But 1 and 2 are still about 100 higher.
Than after that flight, 1 and 2 is back to high temps of 250+ over 3 and 4.
This is what I have done.
Switched each mag off and the temps even across the board increase within 100 from each side. No change on 1 and 2 higher temps. engine runs good on single mag
I switched the egt between 1 and 3. That's wiring and all.
now the hot one goes to 3 on my dynon. So it's not the dynon or the probs
I pull all the injectors and clean them, that's with an ultra sonic cleaner and gun cleaning solvent. On top of that I take the injectors from 3 and 4 and put them in 1 and 2. Same thing, 1 and 2 running hot.
I also cleaned the spider.
I checked the clamps and bolts for the air intake tubes.
CHT are normal
oil temps are normal
If I were to close my eyes and not look at the ems I swear the engine is it's old self. That's with running lean of peak with 3 and 4.
trying to figure my next step, I think I've narrowed it down to the engine. I do fear a possible problem with the cam, looks like intake valves for 1 and 2 are using the same lobe.
appreciate all thoughts on this, trying to find the problem, really pulling my hair out on this one.
I pulled the plugs on 1 and 3 and they both look the same.