300sd engine misfire
300sd engine misfire
I have a 1980 300sd turbo diesel with almost 200k miles with misfiring engine.
all five cylinders do not fire all the time, it feels like. normally it will be running on 4.5 and sometimes it will loose power drastically and it really feels like running on 1 or 2 cylinders. sometimes it stops on the road but usually i just keep on pressing the accel then others gradually start to fire again.
I am not a mechanic but wants to learn and work on my own car.
I had started with this one. i changed the oil, oil filter, both fuel filters, air filters, battery, glow plugs, and did valve adjustments.
I very much like this car and hope i can do some mods on it too like other members in this forum but still cannot turn it into a daily driver.
I got this one for like 2k if this problem is related with serious engine damage then maybe i need to get rid of it but i wish i don't have to.
Please help THANK YOU
Hi everyone I am new.
I have a 1980 300sd turbo diesel with almost 200k miles with misfiring engine.
all five cylinders do not fire all the time, it feels like. normally it will be running on 4.5 and sometimes it will loose power drastically and it really feels like running on 1 or 2 cylinders. sometimes it stops on the road but usually i just keep on pressing the accel then others gradually start to fire again.
I am not a mechanic but wants to learn and work on my own car.
I had started with this one. i changed the oil, oil filter, both fuel filters, air filters, battery, glow plugs, and did valve adjustments.
I very much like this car and hope i can do some mods on it too like other members in this forum but still cannot turn it into a daily driver.
I got this one for like 2k if this problem is related with serious engine damage then maybe i need to get rid of it but i wish i don't have to.
Please help THANK YOU
it used to hesitate when accelerating. i changed the fuel filters. no problem ever since. didn't really examined what the clog was..
since then i started filling up when i'm half way through the tank. recently i had noticed a significant fuel loss until 2/3 of the tank which is another problem.. maybe i need a new tank also..
replaced both prefilter and the spin on.
it used to hesitate when accelerating. i changed the fuel filters. no problem ever since. didn't really examined what the clog was..
since then i started filling up when i'm half way through the tank. recently i had noticed a significant fuel loss until 2/3 of the tank which is another problem.. maybe i need a new tank also..
replaced both prefilter and the spin on.
it used to hesitate when accelerating. i changed the fuel filters. no problem ever since. didn't really examined what the clog was..
since then i started filling up when i'm half way through the tank. recently i had noticed a significant fuel loss until 2/3 of the tank which is another problem.. maybe i need a new tank also..
replaced both prefilter and the spin on.
it used to hesitate when accelerating. i changed the fuel filters. no problem ever since. didn't really examined what the clog was..
since then i started filling up when i'm half way through the tank. recently i had noticed a significant fuel loss until 2/3 of the tank which is another problem.. maybe i need a new tank also..
I only mention it because I recently had some frustrating issues with this stuff myself.
Nice body, tons of ridiculous mechanical issues - 300d turbo 82' /motor 85'
A new tank full of fuel you mean? Maybe you can get a bit more stuff out of the tank it you swap the supply and return lines for a while.
I only mention it because I recently had some frustrating issues with this stuff myself.
Nice body, tons of ridiculous mechanical issues - 300d turbo 82' /motor 85'
maybe this is what i need to do! yes?
http://www.dieselgiant.com/Mercedesfueltankremoval.htm
maybe this is what i need to do! yes?
maybe this is what i need to do! yes?
http://www.dieselgiant.com/Mercedesfueltankremoval.htm
maybe this is what i need to do! yes?
or i can swap supply and return lines for a while before i start taking things apart..
or i can swap supply and return lines for a while before i start taking things apart..
Thank you i definately should examine and really find out where the gas leak is first. hope its not the gas tank
or i can swap supply and return lines for a while before i start taking things apart..
or i can swap supply and return lines for a while before i start taking things apart..
Nice body, tons of ridiculous mechanical issues - 300d turbo 82' /motor 85'
Yeah, if you swap the lines you might just catch some gunk in your clear primary filter. I ended up going to the trouble of pulling out the in tank screen just to find that it was perfectly fine. Piece of mind I guess but, I spilled some fuel and wasted like 2 hrs of my life. And had to buy a $7 socket.
Nice body, tons of ridiculous mechanical issues - 300d turbo 82' /motor 85'
This time when the engine was loosing power with a shake (it felt like it was firing only 3 cylinders) I opened up the hood then used the hand pump to feed more diesel into the engine which quickly let other cylinders to fire.
Is it safe to conclude that there is a problem with a diesel delivery than engine malfunction?
Do I have cloggled up injectors..?
I swaped the lines and didn't solve the problem... hmmmm
This time when the engine was loosing power with a shake (it felt like it was firing only 3 cylinders) I opened up the hood then used the hand pump to feed more diesel into the engine which quickly let other cylinders to fire.
Is it safe to conclude that there is a problem with a diesel delivery than engine malfunction?
Do I have cloggled up injectors..?
Have you noticed a "whoosh" when you unscrew the fuel cap on the tank right after shutdown? if so, it could be a clogged tank vent.
1990 Power Ram 50 V6 SOHC 24V 6g72
I can be wrong, don't take everything I say as verbatim, please fact-check first.
My posts are my personal opinions and thoughts, unless otherwise noted.
Seems like it's getting air into the lines, or the lift pump isn't keeping up with the fuel demand.
Have you noticed a "whoosh" when you unscrew the fuel cap on the tank right after shutdown? if so, it could be a clogged tank vent.
1990 Power Ram 50 V6 SOHC 24V 6g72
I can be wrong, don't take everything I say as verbatim, please fact-check first.
My posts are my personal opinions and thoughts, unless otherwise noted.
Thank you for your help
If I pump hard, it makes a tiny whisling sound around the injectors or injection pump. would this be the sound of air getting into the fuel line? How do I diagnose and fix? If its the lift pump, is there a way to test? and where can I find the tank vent?
Thank you for your help
![[Image: snap_10.jpg]](http://i88.photobucket.com/albums/k176/larsalan/snap_10.jpg)
It will open with minimal pressure going in either direction.
My pump would always make a 'wooshing' sound to so I can't say much about that.
Nice body, tons of ridiculous mechanical issues - 300d turbo 82' /motor 85'
there are 3 lines coming off the tank supply, return and vent. The vent looks like a bell.
It will open with minimal pressure going in either direction.
My pump would always make a 'wooshing' sound to so I can't say much about that.
Nice body, tons of ridiculous mechanical issues - 300d turbo 82' /motor 85'
I'd check for a clogged tank vent first, if there's a "whoosh" from the filler neck, it's likely the vent is clogged.
1990 Power Ram 50 V6 SOHC 24V 6g72
I can be wrong, don't take everything I say as verbatim, please fact-check first.
My posts are my personal opinions and thoughts, unless otherwise noted.
The "whoosh" is the fuel going past the relief valve in the IP, that's normal.
I'd check for a clogged tank vent first, if there's a "whoosh" from the filler neck, it's likely the vent is clogged.
1990 Power Ram 50 V6 SOHC 24V 6g72
I can be wrong, don't take everything I say as verbatim, please fact-check first.
My posts are my personal opinions and thoughts, unless otherwise noted.
1982 300D Turbo ... 3,6xxlbs, No fan, No AC, Hood Stack, No ALDA, No rear bumper and stuffed front, A/W Intercooled, Injectors by Greezer and HUGE Pre-Chambers with help from OM616 & Simpler=Better, Fuel Cranked up, 60 Trim Compressor wheel, EGT, EMP, Boost 50" Rigid Radius bar on roof Aux tank for a total of 48 Gal Of Diesel! Odyssey PC-1750 Battery in trunk, 27"x8.5"/R14 Maxxis BigHorn Mud Terrains, In June '14 issue of Off Road Mag
AX15 Jeep Trans swap in progress....
Captain America
04-24-2011, 04:23 PM #19My tank vent is clogged. But the vent line doesn't have the valve before the bell like in the picture...
1982 300D Turbo ... 3,6xxlbs, No fan, No AC, Hood Stack, No ALDA, No rear bumper and stuffed front, A/W Intercooled, Injectors by Greezer and HUGE Pre-Chambers with help from OM616 & Simpler=Better, Fuel Cranked up, 60 Trim Compressor wheel, EGT, EMP, Boost 50" Rigid Radius bar on roof Aux tank for a total of 48 Gal Of Diesel! Odyssey PC-1750 Battery in trunk, 27"x8.5"/R14 Maxxis BigHorn Mud Terrains, In June '14 issue of Off Road Mag
AX15 Jeep Trans swap in progress....
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