First let me say hello, My name is Greg and I am a new member in the Dallas Fort Worth area.
I have had JD mowers before but not this fuel injected type. I am on the verge of taking it to the shop for diagnosis, but thought I would give this forum a whirl first. Any help at all will be greatly appreciated.
I have had this high hour JD445 mower for about a year now and it has been running well up until recently. I love this JD, the best I have ever owned.
The first thing I noticed was that after starting it on half throttle, it took longer to warm up enough to go full throttle and turn the blades on. The next couple of times starting it, was hard to get it started. It seemed like I had to advance the throttle all the way up then put it back in mid position as it fired to get it to start.
THEN.... a couple days ago I went to start it, it would only idle with the throttle on low and would die every time I advanced the throttle. Weirdly, for a while it actually did idle roughly for several minutes on full throttle. (but usually died when I raise the throttle to high)
I have unplugged the fuel line and it is pushing a lot of fuel so I think that rules out the fuel pump. When it was sputtering along the other day I took the breather off and dripped fuel in the carbs and it briefly sounded just like it used to before the issues at hand.
Today I tried to start it again and it would only pop off for a second when I had the throttle in the lowest position... I cannot get it to run...although I didn't try the gas trick again.
Anyway I was guessing maybe the fuel injectors until I googled around to find out about MAP sensors and other electrical gremlins. I am hoping someone here has an idea what I can do to diagnosis the cause so I do not end up buying parts i don't need or incurring the time and expense of taking it to the JD dealership.
Thank you in advance for reading and contemplating my situation.