Hi there excuse me if this is in the wrong section I’m not very good with computer’s .
I have a Daf lf55.180 recovery vehicle . About 2 months a go i got back from a long journey and parked the lorry up. The following morning i had a call out so got in sharp after literally using the truck the previous day it suddenly started hunting . I went to drive out of my compound and nothing! Totally shut down. No accelerator pedal , Stop warning on the dash and engine management fault on the cluster. I am a vehicle technician to trade so i thought its an old truck ill have a look and see if i can any broken wiring etc , It was all i could do as didn’t have access to HGV diagnostics. I spent all morning just visually inspecting the main loom / fuses relays. I did however find two broken wires deep within the wiring loom that i repaired but made zero difference.
I got hold of a computer and plug for the daf and pulled out these codes:
Now i think some of these where Due to hunting
190-2 Engine speed. Data erratic or intermittent
639-9. J1939 can-bus. No communication. Intermittent
441-15 Smart cooling derate above upper regulation limit threshold. Intermittent
723-2 crankshaft to camshaft signal data erratic . Intermittent
1077-14 HPCR PUMP leakage . Intermittent
157- 4 fuel pressure voltage to low or short circuit to lower voltage . Permanent
I cleared all the codes and the only ones i got back was
157- 4 fuel pressure voltage to low or short circuit to lower voltage . Permanent
And a throttle pedal fault .
So i ordered a fuel pressure sensor at an eye watering price. It didn’t make a difference. Checked the wiring from the ECU to the pressure sensor and was all ok my voltages where also there.
Ive checked the fuel tank isn’t blocked as i read in a previous post on here its common and all good its a relatively new tank. Replaced the fuel filter.
Does anyone on here have the slightest idea what it could be ?
Im edging towards an ECU but again its throwing money i don’t have at parts that mite not fix it. So before i do i thought id come on here and ask . Any advise is appreciated.
It also allows you to rev it hard once from idle then shuts down into sort of limp mode. If i try move the vehicle it shuts the throttle pedal down entirely