PeachParts Mercedes-Benz Forum

PeachParts Mercedes-Benz Forum (http://www.peachparts.com/shopforum/)
-   Diesel Discussion (http://www.peachparts.com/shopforum/diesel-discussion/)
-   -   Odd acceleration issue (http://www.peachparts.com/shopforum/diesel-discussion/345373-odd-acceleration-issue.html)

TheDon 10-23-2013 05:50 PM

Odd acceleration issue
 
'83 300D Turbo

So the gf said that her car will start to slow down from 55 and get slower and slower while driving sometimes and I actually experienced the issue just now. The car would not accelerate at all. I pressed the accelerator and it kicked down but it felt like the car was pushing a brick wall.

At the gas station I checked the brakes for excessive heat and the fronts were normal and the rears were cool.

The clear inline filter showed a little bit of gunk so I'm going to swap that out and hopefully I have a spin on filter and can see what happens. She just filled the tank so I really can't remove the tank strainer.

Any ideas or am I on the right track?

Skippy 10-23-2013 06:08 PM

Sounds like fuel starvation. You're on the right track. Did you see if the fuel tank vent is clogged?

PhantomCadillac 10-23-2013 06:13 PM

remove the fuel tank cap and see if you get a swoosw sound if you do it is the bell shape tank vent under the car near the drives seat take off and clean. In the past with me it has been the prefilter.

TheDon 10-23-2013 06:18 PM

I'll try that when. I get home. Totally forgot about that bugger

GregMN 10-23-2013 07:19 PM

Clean the banjo bolt and line from the intake manifold to the ALDA on the IP.

jt20 10-23-2013 07:28 PM

I just went through a year long experience with a backed out IP timing shaft bolt. -yes it was torqued.

No indication of unburnt fuel or issues starting. Low power (timing off) most noticeable after initial take off.

The car I pulled parts from (someone's project car) also had a backed out bolt but the shaft was still keyed to the timer and the shaft was fractured!

TheDon 10-23-2013 08:07 PM

Quote:

Originally Posted by GregMN (Post 3228110)
Clean the banjo bolt and line from the intake manifold to the ALDA on the IP.

This is definitely a fuel issue, not boost.Acceleration is fine off the line.

barry12345 10-23-2013 08:37 PM

I was thinking maybe some bad fuel. Still acceleration off the line should have been impacted. Take a smell of the tank to see if gas was accidentally loaded.

AlexCole 10-23-2013 09:16 PM

What you are describing is very similar to what happened to me recently. Inline prefilter clogged with small blank chunks. Fuel starvation only occurred a couple of times before I figured it out and replaced the filter. Just cruising along at 73 and want to pass someone, step on the skinny pedal and voila...brick wall and then even some loss of power. Most unnerving. But easy to remedy.

colincoon 10-23-2013 09:52 PM

Definitely tank vent. Norm does the same thing.

Partscarver 10-23-2013 10:06 PM

Seems like the right track. I had an issue with a leaky shutoff valve on the key switch
that led to vacuum leaking into the shutdown circut causing the slows so check that possibility.

cooljjay 10-23-2013 10:22 PM

Did she put gas in the tank?

Could be a linkage issue, how is the throttle pivot pushing on the firewall?

whunter 10-23-2013 10:33 PM

Hmm
 
I agree with all of the possible answers offered thus far.

However: Foul or incredibly low cetane fuel will cause the exact same issue...

Warning ALL Diesel Owners
http://www.peachparts.com/shopforum/diesel-discussion/309367-warning-all-diesel-owners.html#post2841158

http://www.peachparts.com/shopforum/diesel-discussion/94728-bad-smelling-fuel-gag-gasp-choke.html

Diesel owners need to know fuel data
Diesel owners need to know fuel data - PeachParts Mercedes ShopForum

######################################

What is this valve and why is it dripping diesel?
http://www.peachparts.com/shopforum/diesel-discussion/317902-what-valve-why-dripping-diesel.html

Fuel tank vent pictures + location
http://www.peachparts.com/shopforum/2878700-post39.html

What happens when a tank vent gets clogged.
What happens when a tank vent gets clogged. - PeachParts Mercedes ShopForum

Imploded fuel tank - so sad!
http://www.peachparts.com/shopforum/diesel-discussion/314457-imploded-fuel-tank-so-sad.html

Why do I have vacuum in my diesel tank.....................?
Why do I have vacuum in my diesel tank.....................? - PeachParts Mercedes ShopForum

Emptying the fuel tank
Emptying the fuel tank - PeachParts Mercedes ShopForum

Fuel pressure problem solved '80 300SD
http://www.peachparts.com/shopforum/diesel-discussion/333779-fuel-pressure-problem-solved-80-300sd.html

MB diesel filtration, how it works.
MB diesel filtration, how it works. - PeachParts Mercedes ShopForum

fuel filter change
fuel filter change - Page 3 - PeachParts Mercedes ShopForum

Algae/Fungus fixation...
Algae/Fungus fixation... - PeachParts Mercedes ShopForum

Biobor, what is it, why do I need it???
Biobor, what is it, why do I need it??? - PeachParts Mercedes ShopForum

Filters, Fungus, Biocide, etc.
Filters, Fungus, Biocide, etc. - PeachParts Mercedes ShopForum

Algae Clogged Filter Pic StarTron WORKS !
Algae Clogged Filter Pic StarTron WORKS ! - PeachParts Mercedes ShopForum

Braided fuel lines weep. 1984 300TD turbo
Braided fuel lines weep. 1984 300TD turbo - PeachParts Mercedes ShopForum

300SD Fuel Filter Replacement Instructions
300SD Fuel Filter Replacement Instructions - PeachParts Mercedes ShopForum

240D fuel tank removal and cleaning
Good for any W123 sedan.
240D fuel tank removal and cleaning - PeachParts Mercedes ShopForum

Changing the Fuel Tank Strainer on a Mercedes Diesel
Episode 1: Changing the Fuel Tank Strainer on a Mercedes Diesel - YouTube

Check out this fuel pickup screen
Check out this fuel pickup screen - PeachParts Mercedes ShopForum

W123 Fuel Tank Screen Replacement
W123 Fuel Tank Screen Replacement - PeachParts Mercedes ShopForum

Lift Pump taken apart
fuel pressure - PeachParts Mercedes ShopForum

.

TheDon 10-24-2013 08:43 AM

Quote:

Originally Posted by colincoon (Post 3228189)
Definitely tank vent. Norm does the same thing.

After driving 15 minutes I removed the filler cap and I did my get a "whoosh" but as soon as I can I'll clean the vent valve as a precaution. Time to schedule a tank cleaning too

TheDon 10-24-2013 08:46 AM

Quote:

Originally Posted by barry12345 (Post 3228146)
I was thinking maybe some bad fuel. Still acceleration off the line should have been impacted. Take a smell of the tank to see if gas was accidentally loaded.

No gas smell, I was with her when we filled up and we used the dedicated diesel pump. I also have her educated on diesel dueling procedures.


All times are GMT -4. The time now is 03:31 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website