My '83 300D with 250K miles will miss on one cylinder while idling at a stop
light occasionally after driving at highway speeds. By the time I get home,
while driving more slowly, it's idling OK again. The car doesn't miss while
driving. I've never did anything to the injectors durng the last six years,
and the previous owner had no receipts showing anything was done to the
injectors. I'm wondering if this is likely an injector problem or a
compression problem? If it's likely compression, I'll just live with it
until I have more time.
Thanks,
Gerry Archer
'83 300D and 240D
----- Original Message -----
From: "Loren Faeth" <[EMAIL PROTECTED]>
To: "Mercedes Discussion List" <[EMAIL PROTECTED]>
Sent: Monday, May 15, 2006 3:10 PM
Subject: Re: [MBZ] Fuel Injector Life
I assume you are talking about your diesel. Even on OM 621 engines, the
injector nozzles would last 150-200k miles. On my 603, I replaced the
nozzles at 300k, on principle, not because I could prove they were bad. I
would guess you should look for 300-500K on yours, based on better
machining and better metallurgy than 30 years ago.
The 240D had about 220k on the clock when i put new nozzles in when i
rebuilt the engine. Those nozzles were tested and were bad. Kinda low
miles if the odometer was accurate. My guess is that the car had more
miles, but who knows? It may have racked up 150 k running short hops in
Dallas and never left town. On the diesel injector, only the nozzle is
replaced, and it is shimmed to pressure spec. The nozzle holder can stay,
as it has no bearing on the performance of the nozzle. Rusty sells
rebuilt
injector assemblies, so you send in your old ones, holder and all. That
is
what I did on the 603. Unless one is nailing and does not clear, you
probably don't need to worry until you hit 250-300k, then get them
tested.
At 01:35 PM 5/15/2006, you wrote:
How long do FI's last before they need to be cleaned?
Sincerely,
Larry T ('74 911, '67 MGB, 91 300D Turbo)
