Does not hold fuel pressure?
The causes of loss of residual fuel pressure are external leaks, leaking injector, leaking fuel pressure regulator, or a leaking check valve in the fuel pump. The latter is the most common and means pump replacement.
What are the symptoms of a bad diesel fuel pressure regulator?
Symptoms Of A Bad Fuel Regulator
- Engine misfires/poor acceleration.
- Black smoke coming from the exhaust.
- Spark plugs appear black.
- Reduced fuel mileage.
- Gasoline in the vacuum hose.
- Engine backfires.
- Engine won’t crank.
- Excessive fuel pump noise.
Why fuel pressure drops when engine is off?
Completely normal. When the fuel pumps aren’t powered they don’t spin, therefore the force of the pressure that they built up while they were powered reverses against the pump and back into the fuel tank. Eventually that pressure would go down to zero over time.
Where is the fuel pump on a DT-466?
JaymZH2 wrote: fuel pump would be my guess. not sure on the older ones, but the newer DT’s it is on the drivers side mid block towards the front. a couple bolts a 2 lines and your done. I have a 2000 4700 DT-466, would what you call the fuel pump be the same thing they call the “high pressure pump” in the book that the lines from the filter go to??
Where is the turbo pressure on a DT466?
Turbo pressure on the pump is MAXED or should be..at 17psi at full load.. The MOST COMMON problems are “fuel restrictions”.. 1 place thats overlooked is the H20 seperator behind the mud flap on the passenger side, between the tank and the MF..
Why does my dt466e no start-fuel problem?
Got that all fixed. Realized that my primer pump would leak when I would pump it, replaced the entire assembly. Filled both filters, truck fired on the first try. Now today go to run a call, cranks and cranks wont start. Gave a shot of ether, fires but wont run on diesel.
Why is the wastegate not working on a DT466?
Since it’s a mechanical DT466 (not an E), many of those had a Bosch injection pump with an aneroid valve and a wastegate valve on turbo, both activated by turbo boost pressure from intake. I have seen diaphram go bad on wastegate valve pot which causes the aneroid valve to not get pressure to turn up fuel when under load.