93 300D 2.5 starts fine, then bad idle, smoke, until engine get warm, then runs great
10-24-2005, 12:46 PM
#1
Newbie
Thread Starter
Join Date: Sep 2005
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
93 300D 2.5 starts fine, then bad idle, smoke, until engine get warm, then runs great
Just bought a 1993 300D from down south. Here in Colorado, when cold (30 degrees F) it starts, runs fine for 20 seconds, then begins the clunking nailing sound and has heavy smoking at idle.
Once the car warms up, it's just fine, and the car runs and idles very well.
I did notice a tiny fuel leak at two of the injectors as well as some air bubles at the base of one of the injectors.
My theory so far is that the injector seals at least need replacement. Any help or advice would be appreciated.
Also, where is a good place for seals or injectors and does anyone have a link for injector removal/replace procedures?
Thanks
Bob
Once the car warms up, it's just fine, and the car runs and idles very well.
I did notice a tiny fuel leak at two of the injectors as well as some air bubles at the base of one of the injectors.
My theory so far is that the injector seals at least need replacement. Any help or advice would be appreciated.
Also, where is a good place for seals or injectors and does anyone have a link for injector removal/replace procedures?
Thanks
Bob
10-24-2005, 01:28 PM
#3
Newbie
Thread Starter
Join Date: Sep 2005
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
gplugs
Originally Posted by NorCal124
when was the last time you replaced your glow plugs?
10-24-2005, 02:29 PM
#4
Super Member
Join Date: Apr 2005
Location: Northern Cali
Posts: 800
Likes: 0
Received 0 Likes
on
0 Posts
W124
the glow plugs are to diesels as spark plugs are to gasoline engines. the best u can do right now is to begin eliminating the problems. start off w/ small things like a new air filter,fuel filter, glow plugs, or some diesel fuel system cleaner and then work from there. if you start off w/ the small problems first you're pretty much doing as much as you can before taking it to a mechanic. if funds aren't an issue, i suggest doing a big tune up first and see what happens (oil, filters, other fluid changes). but if you see that the injectors are leaking address them immediately.
10-24-2005, 03:07 PM
#5
Newbie
Thread Starter
Join Date: Sep 2005
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
gplug clarification
Originally Posted by NorCal124
the glow plugs are to diesels as spark plugs are to gasoline engines.
Perhaps I misunderstand how diesel engines work. I thought that the compression in the cylinder causes the fuel to burn.
10-24-2005, 03:36 PM
#6
Super Member
Join Date: Apr 2005
Location: Northern Cali
Posts: 800
Likes: 0
Received 0 Likes
on
0 Posts
W124
I'm not an expert in diesels either but I am certain that the glow plugs are a part of the ignition system. Ignition in diesels does occur because of compression, I believe glow plugs heat diesel fuel to a combustable temp. Are there any diesel mechanics or experts out there that can chime in?
10-26-2005, 11:55 AM
#7
Newbie
Thread Starter
Join Date: Sep 2005
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
g plugs
From what I've read on the net, the glow plugs heat the prechamber to 1500 degrees and the gp relay continues to make them glow for a short time Iin seconds), depending on sensor signals it receives. After the engine warms enough, they shut off.
So, one or mor bad g plugs could be my problem and is certainly the first place to look given the fact that when the engine is warm I don't have the described problems.
So, one or mor bad g plugs could be my problem and is certainly the first place to look given the fact that when the engine is warm I don't have the described problems.
