Re: [MBZ] '83 300SD unreliable fuel delivery
Luther Gulseth wrote: My SD has it's moments of fuel pressure loss. You can be crusing down the interstate and suddenly feel a power loss that lasts less than 1/2 second...something exactly like taking your foot off and back on the throttle. Also, at cold start it's very rough and needs to have enough throttle to keep at least 800-900 RPM to run somewhat smooth and not die. Glow plugs are barely 2 years old and the injector pump and injectors were replaced by the P/O (maybe 50kmi ago). I've replaced all the rubber fuel line from tank to primer in the last 8 months. I'm thinking from my experience in the semi-diesel world that I have a lift pump that's weak. I read 07.1-145 Checking fuel pump and bypass valve and it seems that the bypass valve can get clogged and needs to be cleaned and the spring lengthened to increase tension. Is there anyone else that has had an issue similar to this where cleaning the bypass valve fixed the issue or did they have to replace the fuel pump? (btw fuel, primer, lift...they all mean the same thing in the big diesel world) TIA all, The lift pump almost never fails (and the engine will still usually run if the fuel level is above 1/2)!! Look at the tank screen, the inline filter, the main filter or a plugged VENT line. A plugged vent line is the thing that most often causes the symptoms you describe in a Mercedes diesel (vacuum develops and prevents unrestricted fuel flow). Marshall -- Marshall Booth (who doesn't respond to unsigned questions) der Dieseling Doktor [EMAIL PROTECTED] '87 300TD 182Kmi, '84 190D 2.2 229Kmi, '85 190D 2.0 161Kmi, '87 190D 2.5 turbo 237kmi
Re: [MBZ] '83 300SD unreliable fuel delivery
UDG - Joop Schmeitz wrote: W116 runs 3.5 6cyl Dsl Come now, you can't post a sig like that without an explanation... -- John L. Ervine 1981 240D 4-spd 268+kmi 1980 300TD 170+kmi 1980 300SD 277+kmi 1977 280S 4-spd 80+kmi
Re: [MBZ] '83 300SD unreliable fuel delivery
In a message dated 1/30/2006 11:48:28 A.M. US Mountain Standard Time, [EMAIL PROTECTED] writes: My SD has it's moments of fuel pressure loss. You can be crusing down the interstate and suddenly feel a power loss that lasts less than 1/2 second...something exactly like taking your foot off and back on the throttle. Also, at cold start it's very rough and needs to have enough throttle to keep at least 800-900 RPM to run somewhat smooth and not die. Glow plugs are barely 2 years old and the injector pump and injectors were replaced by the P/O (maybe 50kmi ago). I've replaced all the rubber fuel line from tank to primer in the last 8 months. I'm thinking from my experience in the semi-diesel world that I have a lift pump that's weak. I read 07.1-145 Checking fuel pump and bypass valve and it seems that the bypass valve can get clogged and needs to be cleaned and the spring lengthened to increase tension. Is there anyone else that has had an issue similar to this where cleaning the bypass valve fixed the issue or did they have to replace the fuel pump? Luther, Don't overlook the possibility that it is the boost protection switch, mounted on the intake manifold. These will go bad and cut fuel just as you describe but at only 6 or 7 psi instead of 14-15 psi. When the switch closes it interrupts the pressure signal to the ALDA and the engine gets fuel, the equivalent of an unblown car, which feels fairly anemic You can pull the wire from the switch to see if your problem goes away. Or you can remove it and rig a test connection with your mitevac or air compressor. Or a remote possibility is the turbo unloader valve is failing and the pressure is excessive. Good luck, Jim Friesen Phoenix AZ 79 300SD, 262 K miles 98 ML 320, 140 K miles
Re: [MBZ] '83 300SD unreliable fuel delivery
I might drive it up on ramps on that side. ~ ~I cleaned the screen on my SD without making a mess. Run the tank down to ~reserve and jack the right side up as high as possible, best with a ~floorjack. The fuel will be at one side of the tank, leaving the hole where ~the screen is dry. Takes the same socket as the fuel sender (47mm or ~1-7/8). ~ ~ ~-- ~Hans Neureiter, Houston, TX ~'82 300SD, '95 E300D ~___ ~http://www.striplin.net ~For new parts see official list sponsor: http://www.buymbparts.com/ ~For used parts email [EMAIL PROTECTED] ~ ~To Unsubscribe or change delivery options go to: ~http://striplin.net/mailman/listinfo/mercedes_striplin.net -- Luther KB5QHU Alma, Ark '83 300SD (230,xxx kmi) '82 300CD (158,222 kmi) '90 300E '82 300D (parts or run?)
Re: [MBZ] '83 300SD unreliable fuel delivery
yep, you are exactly right, its going to either be that or the tank screen is plugging up. I am leaning more toward the overload valve since the problem goes at goes. If the screen was plugging up it would seem to me it would get worse and worse and finally not run at all rather than it only doing it every once in a while. [EMAIL PROTECTED] wrote: In a message dated 1/30/2006 11:48:28 A.M. US Mountain Standard Time, [EMAIL PROTECTED] writes: My SD has it's moments of fuel pressure loss. You can be crusing down the interstate and suddenly feel a power loss that lasts less than 1/2 second...something exactly like taking your foot off and back on the throttle. Also, at cold start it's very rough and needs to have enough throttle to keep at least 800-900 RPM to run somewhat smooth and not die. Glow plugs are barely 2 years old and the injector pump and injectors were replaced by the P/O (maybe 50kmi ago). I've replaced all the rubber fuel line from tank to primer in the last 8 months. I'm thinking from my experience in the semi-diesel world that I have a lift pump that's weak. I read 07.1-145 Checking fuel pump and bypass valve and it seems that the bypass valve can get clogged and needs to be cleaned and the spring lengthened to increase tension. Is there anyone else that has had an issue similar to this where cleaning the bypass valve fixed the issue or did they have to replace the fuel pump? Luther, Don't overlook the possibility that it is the boost protection switch, mounted on the intake manifold. These will go bad and cut fuel just as you describe but at only 6 or 7 psi instead of 14-15 psi. When the switch closes it interrupts the pressure signal to the ALDA and the engine gets fuel, the equivalent of an unblown car, which feels fairly anemic You can pull the wire from the switch to see if your problem goes away. Or you can remove it and rig a test connection with your mitevac or air compressor. Or a remote possibility is the turbo unloader valve is failing and the pressure is excessive. Good luck, Jim Friesen Phoenix AZ 79 300SD, 262 K miles 98 ML 320, 140 K miles ___ http://www.striplin.net For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://striplin.net/mailman/listinfo/mercedes_striplin.net -- Kaleb C. Striplin/Claremore, OK 89 560SEL, 87 300SDL, 85 380SE, 85 300D, 84 250 LWB, 83 300TD, 81 300TD, 81 240D, 81 240D, 76 450SEL, 76 240D, 76 300D, 74 240D, 69 250 http://www.striplin.net
Re: [MBZ] '83 300SD unreliable fuel delivery
Overload valve is disconnected and by-passed. ~ ~yep, you are exactly right, its going to either be that or the tank ~screen is plugging up. I am leaning more toward the overload valve ~since the problem goes at goes. If the screen was plugging up it would ~seem to me it would get worse and worse and finally not run at all ~rather than it only doing it every once in a while. ~ -- Luther KB5QHU Alma, Ark '83 300SD (230,xxx kmi) '82 300CD (158,222 kmi) '90 300E '82 300D (parts or run?)
Re: [MBZ] '83 300SD unreliable fuel delivery
I doubt the overload valve would be intermittent. Tank vent is easy to check, just don't tighten the filler cap. On 1/31/06, Luther Gulseth [EMAIL PROTECTED] wrote: Overload valve is disconnected and by-passed. ~ ~yep, you are exactly right, its going to either be that or the tank ~screen is plugging up. I am leaning more toward the overload valve ~since the problem goes at goes. If the screen was plugging up it would ~seem to me it would get worse and worse and finally not run at all ~rather than it only doing it every once in a while. ~ -- Luther KB5QHU Alma, Ark '83 300SD (230,xxx kmi) '82 300CD (158,222 kmi) '90 300E '82 300D (parts or run?) ___ http://www.striplin.net For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://striplin.net/mailman/listinfo/mercedes_striplin.net -- Hans Neureiter, Houston, TX '82 300SD, '95 E300D
Re: [MBZ] '83 300SD unreliable fuel delivery
On Tue, 31 Jan 2006 09:56:12 -0500 Luther Gulseth [EMAIL PROTECTED] wrote: Overload valve is disconnected and by-passed. Overload valve? What's that? Craig
Re: [MBZ] '83 300SD unreliable fuel delivery
[EMAIL PROTECTED] wrote: In a message dated 1/30/2006 11:48:28 A.M. US Mountain Standard Time, [EMAIL PROTECTED] writes: My SD has it's moments of fuel pressure loss. You can be crusing down the interstate and suddenly feel a power loss that lasts less than 1/2 second...something exactly like taking your foot off and back on the throttle. Also, at cold start it's very rough and needs to have enough throttle to keep at least 800-900 RPM to run somewhat smooth and not die. Glow plugs are barely 2 years old and the injector pump and injectors were replaced by the P/O (maybe 50kmi ago). I've replaced all the rubber fuel line from tank to primer in the last 8 months. I'm thinking from my experience in the semi-diesel world that I have a lift pump that's weak. I read 07.1-145 Checking fuel pump and bypass valve and it seems that the bypass valve can get clogged and needs to be cleaned and the spring lengthened to increase tension. Is there anyone else that has had an issue similar to this where cleaning the bypass valve fixed the issue or did they have to replace the fuel pump? Luther, Don't overlook the possibility that it is the boost protection switch, mounted on the intake manifold. These will go bad and cut fuel just as you describe but at only 6 or 7 psi instead of 14-15 psi. When the switch closes it interrupts the pressure signal to the ALDA and the engine gets fuel, the equivalent of an unblown car, which feels fairly anemic You can pull the wire from the switch to see if your problem goes away. Or you can remove it and rig a test connection with your mitevac or air compressor. Or a remote possibility is the turbo unloader valve is failing and the pressure is excessive. Unlike when the wastegate opens to limit further boost and power, when the overboost switch activates, power instantly drops about 30% (but the engine should NOT stall - there should be sufficient fuel to allow the engine to run at about 70% of full power). Check this by disconnecting the electric line to the switchover valve of bypass the pressure line thru the switchover valve (directly from the intake manifold to the ALDA). Vacuum in the tank can choke off fuel/power and may even cause the engine to stall, but simply opening (and then reclosing) the gas cap and letting air rush in, restores fuel flow (at least for many miles). This tends to happen unpredictably but usually only after you've been driving for a while. Marshall -- Marshall Booth (who doesn't respond to unsigned questions) der Dieseling Doktor [EMAIL PROTECTED] '87 300TD 182Kmi, '84 190D 2.2 229Kmi, '85 190D 2.0 161Kmi, '87 190D 2.5 turbo 237kmi
Re: [MBZ] '83 300SD unreliable fuel delivery
Craig McCluskey wrote: On Tue, 31 Jan 2006 09:56:12 -0500 Luther Gulseth [EMAIL PROTECTED] wrote: Overload valve is disconnected and by-passed. Overload valve? What's that? The switchover valve that's operated by the overboost pressure switch on the intake manifold! Marshall -- Marshall Booth (who doesn't respond to unsigned questions) der Dieseling Doktor [EMAIL PROTECTED] '87 300TD 182Kmi, '84 190D 2.2 229Kmi, '85 190D 2.0 161Kmi, '87 190D 2.5 turbo 237kmi
Re: [MBZ] '83 300SD unreliable fuel delivery
Is there a gasket, seal, o ring or something similar on the screen assembly that should be replaced when this is removed? Obviously, if so, it is a good plan to have it available before pulling the plug out. Randy B in Winnipeg -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Hans Neureiter Sent: Monday, January 30, 2006 4:41 PM To: Mercedes Discussion List Subject: Re: [MBZ] '83 300SD unreliable fuel delivery I cleaned the screen on my SD without making a mess. Run the tank down to reserve and jack the right side up as high as possible, best with a floorjack. The fuel will be at one side of the tank, leaving the hole where the screen is dry. Takes the same socket as the fuel sender (47mm or 1-7/8). On 1/30/06, Luther Gulseth [EMAIL PROTECTED] wrote: it has been ongoing for several months. I will get the tanks as low as possible and check the tank screen. I'm getting the idea that lift pumps don't have many problems in the 617 engines. ~ ~ ~On Monday, January 30, 2006, at 02:55 PM, Luther Gulseth wrote: ~ ~ I've never had a quality issue with their fuel. ~ ~ There's a first time for everything. ~ ~Johnny B. ~I Mac Therefore I am -- Luther KB5QHU Alma, Ark '83 300SD (230,xxx kmi) '82 300CD (158,222 kmi) '90 300E '82 300D (parts or run?) ___ http://www.striplin.net For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://striplin.net/mailman/listinfo/mercedes_striplin.net -- Hans Neureiter, Houston, TX '82 300SD, '95 E300D ___ http://www.striplin.net For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://striplin.net/mailman/listinfo/mercedes_striplin.net
[MBZ] '83 300SD unreliable fuel delivery
My SD has it's moments of fuel pressure loss. You can be crusing down the interstate and suddenly feel a power loss that lasts less than 1/2 second...something exactly like taking your foot off and back on the throttle. Also, at cold start it's very rough and needs to have enough throttle to keep at least 800-900 RPM to run somewhat smooth and not die. Glow plugs are barely 2 years old and the injector pump and injectors were replaced by the P/O (maybe 50kmi ago). I've replaced all the rubber fuel line from tank to primer in the last 8 months. I'm thinking from my experience in the semi-diesel world that I have a lift pump that's weak. I read 07.1-145 Checking fuel pump and bypass valve and it seems that the bypass valve can get clogged and needs to be cleaned and the spring lengthened to increase tension. Is there anyone else that has had an issue similar to this where cleaning the bypass valve fixed the issue or did they have to replace the fuel pump? (btw fuel, primer, lift...they all mean the same thing in the big diesel world) TIA all, -- Luther KB5QHU Alma, Ark '83 300SD (230,xxx kmi) '82 300CD (158,222 kmi) '90 300E '82 300D (parts or run?)
Re: [MBZ] '83 300SD unreliable fuel delivery
On Monday, January 30, 2006, at 01:47 PM, Luther Gulseth wrote: My SD has it's moments of fuel pressure loss. You can be crusing down the interstate and suddenly feel a power loss that lasts less than 1/2 second...something exactly like taking your foot off and back on the throttle. Also, at cold start it's very rough and needs to have enough throttle to keep at least 800-900 RPM to run somewhat smooth and not die. Glow plugs are barely 2 years old and the injector pump and injectors were replaced by the P/O (maybe 50kmi ago). I've replaced all the rubber fuel line from tank to primer in the last 8 months. I'm thinking from my experience in the semi-diesel world that I have a lift pump that's weak. I read 07.1-145 Checking fuel pump and bypass valve and it seems that the bypass valve can get clogged and needs to be cleaned and the spring lengthened to increase tension. Is there anyone else that has had an issue similar to this where cleaning the bypass valve fixed the issue or did they have to replace the fuel pump? (btw fuel, primer, lift...they all mean the same thing in the big diesel world) TIA all, Have you checked/cleaned/changed the primary filter? They can and do clog and I'm sure you know the car will run as you described. The secondary (spin-on) filter can clog too but is less likely to. Silly question: Could you be low on fuel? I've had some lying fuel gauges cause me to run low. How about water in the fuel? It happens. Johnny B. I Mac Therefore I am
Re: [MBZ] '83 300SD unreliable fuel delivery
I'm thinking from my experience in the semi-diesel world that I have a lift pump that's weak. The hand-operated primer pump can start to leak air. Try using it, if it oozes fuel at all it's a bad sign. -- Jim
Re: [MBZ] '83 300SD unreliable fuel delivery
Fuel filters were changed after a Diesel Purge at the last valve adjust in early November. Problem happens with a full or empty tank of fuel. Primer pump might be a year old now and is the new style. I don't know about water in the fuel, I might purchase some addative and give that a try. I've always fueled at the same location (unless on a road trip, then always at FlyingJ) with both the CD and SD and my parents fill their '85D up at the same location. I've never had a quality issue with their fuel. ~ ~ ~On Monday, January 30, 2006, at 01:47 PM, Luther Gulseth wrote: ~ ~ ~ ~ Have you checked/cleaned/changed the primary filter? They can and do ~clog and I'm sure you know the car will run as you described. The ~secondary (spin-on) filter can clog too but is less likely to. ~ Silly question: Could you be low on fuel? I've had some lying fuel ~gauges cause me to run low. How about water in the fuel? It happens. ~ ~Johnny B. ~I Mac Therefore I am -- Luther KB5QHU Alma, Ark '83 300SD (230,xxx kmi) '82 300CD (158,222 kmi) '90 300E '82 300D (parts or run?)
Re: [MBZ] '83 300SD unreliable fuel delivery
Luther, My cars will exhibit precisely those symptoms when I get a bad batch of bio, or if temps go below cloud point. Thanks, Bruce Luther Gulseth [EMAIL PROTECTED] wrote: My SD has it's moments of fuel pressure loss. You can be crusing down the interstate and suddenly feel a power loss that lasts less than 1/2 second...something exactly like taking your foot off and back on the throttle. Also, at cold start it's very rough and needs to have enough throttle to keep at least 800-900 RPM to run somewhat smooth and not die. Glow plugs are barely 2 years old and the injector pump and injectors were replaced by the P/O (maybe 50kmi ago). I've replaced all the rubber fuel line from tank to primer in the last 8 months. I'm thinking from my experience in the semi-diesel world that I have a lift pump that's weak. I read 07.1-145 Checking fuel pump and bypass valve and it seems that the bypass valve can get clogged and needs to be cleaned and the spring lengthened to increase tension. Is there anyone else that has had an issue similar to this where cleaning the bypass valve fixed the issue or did they have to replace the fuel pump? (btw fuel, primer, lift...they all mean the same thing in the big diesel world) TIA all, -- Luther KB5QHU Alma, Ark '83 300SD (230,xxx kmi) '82 300CD (158,222 kmi) '90 300E '82 300D (parts or run?) ___ http://www.striplin.net For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://striplin.net/mailman/listinfo/mercedes_striplin.net Bruce 82 300CD 334kmi 'His' 85 300CD 240kmi 'Hers' 75 240D 202kmi 'Donner' 77 240D 204kmi 'Blitzen' - Yahoo! Autos. Looking for a sweet ride? Get pricing, reviews, more on new and used cars. From [EMAIL PROTECTED] Mon Jan 30 20:35:39 2006 Received: from pop-sarus.atl.sa.earthlink.net ([207.69.195.72]) by server5.arterytc5.net with esmtp (Exim 4.52) id 1F3fkR-000607-Lw for [EMAIL PROTECTED]; Mon, 30 Jan 2006 20:35:39 + Received: from user-10mt01r.cable.mindspring.com ([65.110.128.59] helo=earthlink.net) by pop-sarus.atl.sa.earthlink.net with esmtp (Exim 3.36 #10) id 1F3fkP-0003uk-00 for [EMAIL PROTECTED]; Mon, 30 Jan 2006 15:35:37 -0500 Date: Mon, 30 Jan 2006 15:35:35 -0500 Mime-Version: 1.0 (Apple Message framework v553) From: John Berryman [EMAIL PROTECTED] To: Mercedes Discussion List [EMAIL PROTECTED] In-Reply-To: [EMAIL PROTECTED] Message-Id: [EMAIL PROTECTED] X-Mailer: Apple Mail (2.553) X-Antivirus-Scanner: Clean mail though you should still use an Antivirus Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit X-Content-Filtered-By: Mailman/MimeDel 2.1.6 Subject: Re: [MBZ] '83 300SD unreliable fuel delivery X-BeenThere: [EMAIL PROTECTED] X-Mailman-Version: 2.1.6 Precedence: list Reply-To: Mercedes Discussion List [EMAIL PROTECTED] List-Id: Mercedes Discussion List mercedes_striplin.net.striplin.net List-Unsubscribe: http://striplin.net/mailman/listinfo/mercedes_striplin.net, mailto:[EMAIL PROTECTED] List-Archive: http://striplin.net/pipermail/mercedes_striplin.net List-Post: mailto:[EMAIL PROTECTED] List-Help: mailto:[EMAIL PROTECTED] List-Subscribe: http://striplin.net/mailman/listinfo/mercedes_striplin.net, mailto:[EMAIL PROTECTED] X-List-Received-Date: Mon, 30 Jan 2006 20:35:39 - On Monday, January 30, 2006, at 02:55 PM, Luther Gulseth wrote: I've never had a quality issue with their fuel. There's a first time for everything. Johnny B. I Mac Therefore I am
Re: [MBZ] '83 300SD unreliable fuel delivery
95% of all fuel problems are caused because of dirt in the tank. Empty your tank as much as possible (use hose or pump dsl out) Go under your car, remove primary filter (this is the filter in the tank) Have a look it will be dirty all over, clean it and the problem will be solved. Joopster W116 runs 3.5 6cyl Dsl -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of John Berryman Sent: 30 January, 2006 9:36 PM To: Mercedes Discussion List Subject: Re: [MBZ] '83 300SD unreliable fuel delivery On Monday, January 30, 2006, at 02:55 PM, Luther Gulseth wrote: I've never had a quality issue with their fuel. There's a first time for everything. Johnny B. I Mac Therefore I am ___ http://www.striplin.net For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://striplin.net/mailman/listinfo/mercedes_striplin.net
Re: [MBZ] '83 300SD unreliable fuel delivery
it has been ongoing for several months. I will get the tanks as low as possible and check the tank screen. I'm getting the idea that lift pumps don't have many problems in the 617 engines. ~ ~ ~On Monday, January 30, 2006, at 02:55 PM, Luther Gulseth wrote: ~ ~ I've never had a quality issue with their fuel. ~ ~ There's a first time for everything. ~ ~Johnny B. ~I Mac Therefore I am -- Luther KB5QHU Alma, Ark '83 300SD (230,xxx kmi) '82 300CD (158,222 kmi) '90 300E '82 300D (parts or run?)
Re: [MBZ] '83 300SD unreliable fuel delivery
the screen in your tank is getting plugged up. Luther Gulseth wrote: My SD has it's moments of fuel pressure loss. You can be crusing down the interstate and suddenly feel a power loss that lasts less than 1/2 second...something exactly like taking your foot off and back on the throttle. Also, at cold start it's very rough and needs to have enough throttle to keep at least 800-900 RPM to run somewhat smooth and not die. Glow plugs are barely 2 years old and the injector pump and injectors were replaced by the P/O (maybe 50kmi ago). I've replaced all the rubber fuel line from tank to primer in the last 8 months. I'm thinking from my experience in the semi-diesel world that I have a lift pump that's weak. I read 07.1-145 Checking fuel pump and bypass valve and it seems that the bypass valve can get clogged and needs to be cleaned and the spring lengthened to increase tension. Is there anyone else that has had an issue similar to this where cleaning the bypass valve fixed the issue or did they have to replace the fuel pump? (btw fuel, primer, lift...they all mean the same thing in the big diesel world) TIA all, -- Kaleb C. Striplin/Claremore, OK 89 560SEL, 87 300SDL, 85 380SE, 85 300D, 84 250 LWB, 83 300TD, 81 300TD, 81 240D, 81 240D, 76 450SEL, 76 240D, 76 300D, 74 240D, 69 250 http://www.striplin.net
