I've been having a problem with a hyster H110xl. it has two problems which may be related, both with the gasoline only fuel system.
The first problem is that it chronically runs too rich, and some times floods if it doesn't start on the first attempt. While its running it frequently bogs down while trying to accelerate and once and a while even backfires through the TB. It also some-times puffs black smoke, there is a huge soot stain on the inside of the CW, so its been doing this for a while, I would guess. With the air horn removed I can actually see fuel pooling up on top of the butterflys while it idles. I'm not very experienced with TBI style injection, but it looks like way to much fuel coming from the injectors to me. According to the available records the only thing ever replaced in the fuel system was a throttle pos sensor a few months ago. The spark plugs were also just replaced due to fouling, and at the current rate it won't be long before they're fouled again.
What should I look for to solve this problem? Check fuel pressure? Faulty ETC or MAP sensor? Bad ignition module? Worn out injectors? Bad O2 sensor? Does it even have one? While its running there is no CEL.
The second problem is an intermittent failure of the butterflys to open when the throttle cable is pulled. There is some sort of spring-loaded mechanism that interacts between the throttle lever outside the TB, the throttle shaft and the electronic governor. I think that it could be related to the flooding problem because when I witnessed it sticking it was also one of the times that the fuel was pooling on top of the butterflies (while the engine was idling) when the engine was shut off it immediately returned to normal. Any knowledge of this problem out there? Thanks.