![]() ![]() High side fuel pressure problems are some of the hardest problems to pinpoint quickly. Usually if another problem is causing the no start a dtc will set but there are always exceptions. I would recheck all of the fuel tests and make sure that they are rechecked after a suspect component is replaced. Low pressure pumps that are located on the fuel filter housing are almost as failure prone as the older versions. The basics cannot be forgotten though, make sure the proper volume is supplied to the injection pump also. Sometimes these problems are intermittent and are missed during the fuel system tests. Sometimes the injector develops a problem and leaks internally. Sometimes these nuts lose torque through heat cycles and cause leaks. The nut underneath the line coming off of the fuel rail actually smashes a pipe between the cylinder head and the injector body to create a tight seal. The connector tubes I am talking about are the only connection between the high pressure lines and the injector. This is by far the most common problem with the common rail diesel. Most likely you had more than one injector with higher than normal leakage and the one with the most leakage was replaced. After replacing the injector some techs just tighten the connector tube nut and do not torque it properly which can distort the injector body causing a leak again. They used to be available in a "six pack" for less money but now they are not. These are the reasons I sometimes suggest replacing all injectors and connector tubes. I have had this same situation happen to me except I am on the other side being the one that worked on the customer's vehicle. Most likely you have one injector or connector tube leaking-not all of em. If return is high, then block off each injector with the other miller tool (sorry I don't know the tool numbers from memory) the one you block off that causes the flow drop is the problem. If you take the truck to a shop, have them to a fuel injector return test-it can only be done properly with the miller tools installed to block injection pump return from the fuel injector return. Once the engine is running it can build the proper pressure to compensate for the injectors leakage. This is why the starting fluid helps (not recommended). At cranking speed it cannot supply the needed fuel pressure. If an injector is leaking back to the tank and the injection pump is trying to pump 5kpsi of pressure to the rail it is like blowing up a balloon with a hole in it. What is happening is the fuel injectors need aroung 5kpsi to open along with the electronic impulse. EDIT: Forgot to mention that it is not throwing any SES or codes.Ī leaking fuel injector will cause starting problems warm or cold and the engine will run fine if you get it started. If there is anything you guys can think of let me know I can give it a try. ![]() I am very familiar with gas and diesel engines, and have done everything to a gas engine you can imagine, i just cant think of any thing that would make it do what it is doing. One guy said that it needs new injectors, other guy said needs new injector pump. I've talked to many people about this and they come up with a lot of good reasons, but all the reasons they mentioned would also have other symptoms and not just the starting issue. The truck runs great after it is started, I drove it a bit and I noticed that it wont blow black smoke at all at anytime. I've tried letting it run awhile get warm turn off then right back on and nothing it wont start but will always turn over. I'm not sure why starting fluid but i do know it has a lower flash point then diesel does, but that is what the guy found out that was driving it, it is a work truck and needless to say the one driving it isn't the brightest crayon in the box. You can spray it in your self, pop hood, spray, close hood, get back in the truck and start, it does take about 5 seconds of turning it over until it starts. This has to be done EVERY time you go to start it. Hey guys my father in law has a 03 and the absolute only way to get it to start is to spray starting fluid in to the air box right behind the air filter.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |