Posted by Bob on October 17, 2007 at 17:17:27 from (69.178.229.154):
In Reply to: 6.5 diesel again lol posted by smdv806 on October 17, 2007 at 15:43:39:
Any trouble codes?
That DS4 pump uses a fuel cutoff solenoid and a "fuel solenoid".
The fuel cutoff solenoid is actvated as soon as the "ignition" switch is turned on. The mechanicals of the pump are very similar to the "DB" mechanical pump it replaced, with the exception of the second "fuel solenoid".
This solenoid is commanded to CLOSE by the 'puter (through the PMD) just before EACH injection event.
The precise fraction of a second that solenoid (FS)closes determines the START of injection (timing), and the exact millisecond the solenoid is commanded "OPEN" determines the LENGTH of each injection cycle, and, therefore, the fuel rate.
When the FS opens, the remaining fuel from that injection cycle is "wasted" into the pump housing, rather than being forced through the injector.
You need a signal from the crank position sensor TO the 'puter, as well as the "fine" position signal from the optointerrupter in the IP for the "puter to get a "fix" on when to begine injection. Then the 'puter has to be functioning to interpret all that, and feed a signal to the FSD, which powers the fuel solenoid, as required, as well the the fuel solenoid on the pump's "head" to do what the 'puter, though the PMD commands it to do. So, there's a LOT that can go wrong.
Start by checking ALL the fuses and fusible links, as well as ALL engine grounds.
There MAY be trouble codes as well.
Here's a photo of the pumps internal "fuel solenoid", from the "Real Diesel" website:
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
... [Read Article]
Latest Ad:
Oliver 550 Diesel runs like a watch three point hitch pto engine gone threw about two hundred hours ago nice clean tractor
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.