opcom
SDD Junior Member
I bought a 2008 F-550 with 98K miles. It was still under the Ford warranty for drivetrain but had the usual "as-is" sticker on the window. I had it in the service for some minor stuff and the front end was not in alignment and the vacuum pump for the 4x4 engagement was replaced because the 4x4 was blowing fuses. That got fixed. When I had left it, I had their tech ride with me and tried to ask them questions about the engine sound, he said it was normal. -so it has been in there for an issue I was not sure about, before the 100K warranty was up. They didn't attach anything to it, he just said it was OK.
There has been no apparent change or problems with the running of the truck.
So, it has now just 100600 miles after about a month. Sunday morning I drove it a few miles and then parked it in my driveway. Today - Monday AM, it would not start, just cranked. Then it started, then the wrench lit up on the display and it shut off. Repeated this 3-4 times.
I had it towed to a closer dealer and his tech checked the prime, the low pressure pump (8 psi), and used a toughbook computer with some dongle on it to show oscilloscope traces of various voltages while he cranked it.
He said the low pressure was OK, and the indication was the high pressure (rail) sensor was out of range.
He said the passenger valve cover has to come off to check the sensor with a meter. 6-7 hours.
He said if it is not the sensor, it is the high pressure pump, which requires removal of the cab. (I know this part is supremely expensive).
I called Sam Pack Ford, the dealer I originally got the truck from, and they said to said bring it in. The salesman, after talking to the service manager, said they would not help me to get this covered under the 100K warranty. (apparently salespeople are stuck with any after-sale problems)
So, could this be caused by driving through some water in the rain? and water spraying up on the engine? A bad connection on a connector under the hood? I know mechanical diesels and I know electronics, but I do not know this tricky computerized engine.
It seems unlikely that a sensor would just quit, but maybe they do..
It seems extremely unlikely that the high pressure fuel pump would die overnight sitting in the driveway with no warning or decrease in performance at all. My experiences with diesels and both injector pumps and PT (pressure-time) pumps indicate they die not instantly, but over a time period, whether it is minutes or hours or in some cases days, but there is always a warning, some feel that is not right or a loss of power before the end.
If this thing has a bad HP pump, I am wanting to pressure Ford to cover it but I do not know where to call. 100600 miles for this failure is not acceptable.
Does anyone have experience concerning this kind of failure and might want to comment on the information I have provided from the technician?
There has been no apparent change or problems with the running of the truck.
So, it has now just 100600 miles after about a month. Sunday morning I drove it a few miles and then parked it in my driveway. Today - Monday AM, it would not start, just cranked. Then it started, then the wrench lit up on the display and it shut off. Repeated this 3-4 times.
I had it towed to a closer dealer and his tech checked the prime, the low pressure pump (8 psi), and used a toughbook computer with some dongle on it to show oscilloscope traces of various voltages while he cranked it.
He said the low pressure was OK, and the indication was the high pressure (rail) sensor was out of range.
He said the passenger valve cover has to come off to check the sensor with a meter. 6-7 hours.
He said if it is not the sensor, it is the high pressure pump, which requires removal of the cab. (I know this part is supremely expensive).
I called Sam Pack Ford, the dealer I originally got the truck from, and they said to said bring it in. The salesman, after talking to the service manager, said they would not help me to get this covered under the 100K warranty. (apparently salespeople are stuck with any after-sale problems)
So, could this be caused by driving through some water in the rain? and water spraying up on the engine? A bad connection on a connector under the hood? I know mechanical diesels and I know electronics, but I do not know this tricky computerized engine.
It seems unlikely that a sensor would just quit, but maybe they do..
It seems extremely unlikely that the high pressure fuel pump would die overnight sitting in the driveway with no warning or decrease in performance at all. My experiences with diesels and both injector pumps and PT (pressure-time) pumps indicate they die not instantly, but over a time period, whether it is minutes or hours or in some cases days, but there is always a warning, some feel that is not right or a loss of power before the end.
If this thing has a bad HP pump, I am wanting to pressure Ford to cover it but I do not know where to call. 100600 miles for this failure is not acceptable.
Does anyone have experience concerning this kind of failure and might want to comment on the information I have provided from the technician?
