B2710 injector problem?

[astoneburner]

After tractor runs approx 30 min it develops a misfire.Tracked this to #1 cylinder.Let tractor sit a couple hours and fine again for 30 min.I am thinking injector issue.
hopefully not the pump
any ideas
thanks Alan

 

[Stumpy]

Possibly fuel starvation which is usually caused by a plugged fuel filter, I'd change it just to rule that out. What makes you think it's cylinder one?

 

[astoneburner]

Cracked injector line open while running and made no difference in rpm similar to pulling a plug wire to locate miss.Fuel starvation should affect all cylinders and mainly under a load.I changed filter anyway.
Ordered new injector from Messicks today.
Alan

 

[Stumpy]

Agreed it's probably not the filter. I assume you were getting good fuel at the injector bleeder? The injector's not a bad guess but kinda of expensive for guess and replace. If that doesn't do it the next thing to do is a compression\leakdown test on that cylinder.

 

[gurn]

For you're sake I hope its the injector. If so you could rebuild the old one for a spare. It probably just has some crud in it. Anyway, welcome to OTT.

 

[astoneburner]

My thoughts exactly on rebuilding injector for a spare.Have not done compresion test yet due to fact it runs so good for first hour and no crankcase blowby.Figured I would have new injector here before tearing old one apart.
I just bought tractor used about 3 weeks ago and was not expecting to see this type of problem with only 1350 hours on it.This is my first Kubota and so far I love it.
A big thanks to the forum for some good info for new owners of old kabota's