6610 Ford Tractor Questions?

Hey I have a 6610 Ford tractor I believe it is a 1991 model. I
have a miss and I?m thinking I have an injector acting up. I
was wondering if they have injector cups with coolant that
runs through them to have to worry about when I pull the
injectors? Also do the later 6610 Ford tractors not have lift
pumps? I do not see one anywhere on my tractor and I am
assuming the injection pump has it built in? If anyone can help
me I would really appreciate it. I am planning on doing more
diagnosing tomorrow by cracking injector lines to see if I can
pin point which cylinder it is. Some times it seems to be a
constant dead miss, then sometimes it seems to be
intermediate. It also seems like different rpms affect it some
also. Does not smoke much has a little haze when it?s
missing. I appreciate you guys always helping with my tractor
questions.
 
No injector cups to worry about on that engine.

As for the miss, I'm going to say that it's most likely a misfire caused by retarded timing. You could try to manually advance the pump a few degrees. If it goes away, you have a sticking advance mechanism within the pump.
 
Thanks for the reply I will play with the timing this weekend and see if that makes a difference. If it doesn?t I will most likely be ordering some new Injectors. I have been looking at the tractor to see about adding an electric lift pump. I would think that would do nothing but help things and be easier on the injection pump sense it has to pull the full from the fuel tank down low sense mine is a cab tractor. But one thing I noticed that I don?t no is normal is when the tractor is at idle You can pump the Primer pump and the tractor will rev up? I figured the Injection pump would be regulated to were that would not effect that? So maybe a Lift pump will not work right on these tractors? Added pictures of my tractor and Vin number.
cvphoto5347.png


cvphoto5348.jpg
 
Just an FYI - From the Unit Number, 9L02B, that is a 1989 tractor which left the assembly line on November 2, 1989 during the day shift.

Model number EA414C is a 6610 with a diesel engine, independent 540 rpm PTO and an 8 speed transmission.
 

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