panhandler1956
Well Known Member
Ok, looking for some advice. I searched the archives, but haven't seen anything that matches my situation, unless I missed it.
I have an IO-360-A1A 250 SMOH.
Airframe has 70 hours.
Bendix injection and mags
Ran fine for the last year and suddenly developed this problem.
It starts and runs fine, but when you apply takeoff power it spits and sputters badly. It initially would smooth out, but now it's really bad and won't make power - really rough.
Had one cylinder egt go abnormally high and had an intermittently bad left mag check.
So far I have:
Checked the timing - it's good
Replaced the plugs (two were weak)
Replaced the left mag harness (found a weak plug wire on the cylinder that had high egt)
Cleaned the injectors
Cleaned the fuel filter and screen
No water in fuel
Boost pump on or off- no change
Isolating mags - no change
Cables all go to the stops
This has fixed the egt and mag check issue, but the bad stumble remains.
I pulled the flow divider off and cleaned it, but haven't tested it yet.
I was thinking next steps, if the cleaning doesn't work, is to send the servo and divider out for overhaul.
Any other ideas?
I have an IO-360-A1A 250 SMOH.
Airframe has 70 hours.
Bendix injection and mags
Ran fine for the last year and suddenly developed this problem.
It starts and runs fine, but when you apply takeoff power it spits and sputters badly. It initially would smooth out, but now it's really bad and won't make power - really rough.
Had one cylinder egt go abnormally high and had an intermittently bad left mag check.
So far I have:
Checked the timing - it's good
Replaced the plugs (two were weak)
Replaced the left mag harness (found a weak plug wire on the cylinder that had high egt)
Cleaned the injectors
Cleaned the fuel filter and screen
No water in fuel
Boost pump on or off- no change
Isolating mags - no change
Cables all go to the stops
This has fixed the egt and mag check issue, but the bad stumble remains.
I pulled the flow divider off and cleaned it, but haven't tested it yet.
I was thinking next steps, if the cleaning doesn't work, is to send the servo and divider out for overhaul.
Any other ideas?