this is probably the most basic question but I'm not very familiar with 24v's. have a rollback with a 24v in it that will randomly start running rough and jumping around at about 1000-1500 rpms and when it does it the pedal goes completely unresponsive. no check engine, no codes. I'm leaning towards the lift pump is getting weak and the vp can't take it. hoping that's what it is. no smoke or anything, any help would be appreciated
