Hi guys,
I have a large fleet of buses and this one P-pumped engine has power one day and not the next.
All the usual has been performed; several filter changes/lift pump psi tested twice (both times 24psi) boost is at 13psi driving up a long hill @ WOT.
Because this probelm comes and goes (during the last two years or better) I'm assuming it's a governor problem??????????
I don't know what for governor this engine has. The engine has 98,000 miles.
The p-pumped engines as a rule, are extreamly limited in the fuel they deliver on school buses, but this one will run about 60 top speed and then only 40 top speed.
Thanks in advance guys for any help.
-S