On and off problems are seldom mechanical - -they are more likely to be electrical. With the newer injection pumps, it can be difficult to separate the mechanical parts from the electrical parts, but I'd try to replace any electrical parts (such as a fuel temp sensor, if it has one) before going to the cost of replacing the injection pump. I've heard a number of people have issues with the temperature sensors on the nwer injection pumps when using biodiesel.
Z On Tue, Jul 28, 2009 at 3:46 PM, fox mulder <[EMAIL PROTECTED]> wrote: > > Thank you Mark for good infomation. At present i am having the same problem > with jeep cherokee 2.5 TD 1997. It's OK with the shorter trips. The engine > switches off when it is driven at above or at 50 mies per hour for some > time. After waiting for 15 to 20 minutes it restarts and drives at 50 mph > for a while and then it cuts off. Do you think if I replace he injection > pump, the problem will be solved. > > fox > > --- On Tue, 28/7/09, Thompson, Mark L. (Boise IPG) <[EMAIL PROTECTED]> > wrote: > > > From: Thompson, Mark L. (Boise IPG) <[EMAIL PROTECTED]> > > Subject: Re: [Biofuel] effect of biodiesel on injection pump > > To: "sustainablelorgbiofuel@sustainablelists.org" < > sustainablelorgbiofuel@sustainablelists.org> > > Date: Tuesday, 28 July, 2009, 6:36 PM > > The location of the sensor, on my 98 > > Jetta at least, in inside the injector pump. > > Just under the access cover, it is submerged in diesel. > > With the right tool, it is only about a 5 min job to > > replace. > > > > The temperature can be read using a VagCom interface and > > software for a PC. > > > > What symptoms you describe are common for a cracked temp > > sensor. Intermittent or complete failure of the sensor. > > Highly unlikely you lost your ECM. VW TDI ECM's are so > > hyper sensitive, they will shutdown the engine if there is > > any remote possibility of damaging the engine. > > As for a bad injector pump, id be skeptical of that. I > > would guess you had a bad sensor and the shop misdiagnosed > > it. > > Not surprising when it comes to TDI's, Dealers, and $$$. > > > > > > Mark > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] > > On Behalf Of fox mulder > > Sent: Tuesday, July 28, 2009 7:47 AM > > To: sustainablelorgbiofuel@sustainablelists.org > > Subject: Re: [Biofuel] effect of biodiesel on injection > > pump > > > > > > Dear JQ, > > I am refering to the electronic temperature sensor that > > senses the temperature of the diesel that goes to the > > injection pump. All in all it's the injection system that is > > affected by the biodeisel. > > What action did you take James? Did you carry out the > > electronic diagnosis? > > When i had passat diagnosed. I was told that I needed to > > replace the whole computer module and the injection pump. > > The cost of this was astronomical.I just got rid of the car. > > It seems i need to do the same with the jeep. > > fox > > > > > > > > > > > > --- On Mon, 27/7/09, James Quaid <[EMAIL PROTECTED]> > > wrote: > > > > > From: James Quaid <[EMAIL PROTECTED]> > > > Subject: Re: [Biofuel] effect of biodiesel on > > injection pump > > > To: sustainablelorgbiofuel@sustainablelists.org > > > Date: Monday, 27 July, 2009, 11:29 PM > > > Fox, > > > > > > Interesting info. > > > > > > I had a similar problem using a combination of diesel > > and > > > WVO in an 85 > > > VW TDI Jetta. Where I would start it on diesel and > > switch > > > to WVO after > > > the engine was up to temp. > > > > > > It died at a red light one day and I had to have it > > > towed. However an > > > hour later it started right up. It was also hard to > > start > > > if you had > > > turned it off and the engine was warm. A 15 - 30 min > > wait > > > and it would > > > start. > > > > > > What temp sensor are you referring to?? > > > > > > Thanks. > > > JQ > > > > > > > > > -----Original Message----- > > > From: fox mulder <[EMAIL PROTECTED]> > > > Reply-to: sustainablelorgbiofuel@sustainablelists.org > > > To: sustainablelorgbiofuel@sustainablelists.org > > > Subject: Re: [Biofuel] effect of biodiesel on > > injection > > > pump > > > Date: Mon, 27 Jul 2009 22:07:17 +0000 (GMT) > > > > > > Dear All, > > > I used 100% biodiesel in VW passat and jeep cherokee > > > limited for the last few years. Prior to jeep I used > > it in > > > passat. after three years, I found that the car would > > cut > > > off and would not start. after waiting for 10 to 15 > > minutes > > > it would start and go for a few miles, then it would > > cut > > > off again. I paid a lot of money to have it > > diagnosed. > > > They found that the injection pump and the > > temperature > > > sensor need replacing. > > > After using th biosiesel in jeep for two years, I am > > > encountering exactly the same problem. > > > Has anyone else experienced the same situation as me? > > If > > > so, would you advise me as to what you have learnt. > > > > > > fox > > > > > > > > > > > > _______________________________________________ > > > > Biofuel mailing list > > > > Biofuel@sustainablelists.org > > > > http://sustainablelists.org/mailman/listinfo/sustainablelorgbiofuel > > > > > > > > Biofuel at Journey to Forever: > > > > http://journeytoforever.org/biofuel.html > > > > > > > > Search the combined Biofuel and Biofuels-biz > > list > > > archives > > > > (70,000 messages): > > > > http://www.mail-archive.com/biofuel@sustainablelists.org/ > > > > > > > > > > > > > > > > > > > _______________________________________________ > > > Biofuel mailing list > > > Biofuel@sustainablelists.org > > > http://sustainablelists.org/mailman/listinfo/sustainablelorgbiofuel > > > > > > Biofuel at Journey to Forever: > > > http://journeytoforever.org/biofuel.html > > > > > > Search the combined Biofuel and Biofuels-biz list > > archives > > > (70,000 messages): > > > http://www.mail-archive.com/biofuel@sustainablelists.org/ > > > > > > _______________________________________________ > > > Biofuel mailing list > > > Biofuel@sustainablelists.org > > > http://sustainablelists.org/mailman/listinfo/sustainablelorgbiofuel > > > > > > Biofuel at Journey to Forever: > > > http://journeytoforever.org/biofuel.html > > > > > > Search the combined Biofuel and Biofuels-biz list > > archives > > > (70,000 messages): > > > http://www.mail-archive.com/biofuel@sustainablelists.org/ > > > > > > > > > > > > > _______________________________________________ > > Biofuel mailing list > > Biofuel@sustainablelists.org > > http://sustainablelists.org/mailman/listinfo/sustainablelorgbiofuel > > > > Biofuel at Journey to Forever: > > http://journeytoforever.org/biofuel.html > > > > Search the combined Biofuel and Biofuels-biz list archives > > (70,000 messages): > > http://www.mail-archive.com/biofuel@sustainablelists.org/ > > > > _______________________________________________ > > Biofuel mailing list > > Biofuel@sustainablelists.org > > http://sustainablelists.org/mailman/listinfo/sustainablelorgbiofuel > > > > Biofuel at Journey to Forever: > > http://journeytoforever.org/biofuel.html > > > > Search the combined Biofuel and Biofuels-biz list archives > > (70,000 messages): > > http://www.mail-archive.com/biofuel@sustainablelists.org/ > > > > > > > _______________________________________________ > Biofuel mailing list > Biofuel@sustainablelists.org > http://sustainablelists.org/mailman/listinfo/sustainablelorgbiofuel > > Biofuel at Journey to Forever: > http://journeytoforever.org/biofuel.html > > Search the combined Biofuel and Biofuels-biz list archives (70,000 > messages): > http://www.mail-archive.com/biofuel@sustainablelists.org/ > -------------- next part -------------- An HTML attachment was scrubbed... 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