Tech assistance please. 04 CLK55 fuel injector removal
Thread Starter
Newbie
Joined: Sep 2019
Posts: 5
Likes: 2
2004 CLK55 AMG Cabriolet
Tech assistance please. 04 CLK55 fuel injector removal
Greetings! 04 CLK55 Cab. 38,000 miles when I bought it a few months ago. Had all fluids changed. Knowing this thing had sat for extended periods, I decided to run a bottle of Techron through it to de-gunk the combustion chamber (at least a little). Ironically enough I started smelling something a little different when in the garage, so I popped the hood and took a sniff of the oil filler. Yup...fuel. There are only two ways that's happening.....stuck/dripping injector(s) or ring/hole in piston.
Power has been fine and nothing feels like it's not now. So, I'm guessing the Techron broke some crap free and I have a little extra pulsewidth on the injector(s)
I'll start there. I have AllDataDIY and have scoured You Tube and Googled and have yet to find anything that gives detailed info on clearing the plastic stuff off the fuel rails. The passenger side has nothing...your basic two bolts. The driver's side, not so much. Plastic cover that goes back to a tube at the firewall and appears to have a connector onto a nipple on the manifold about midway back.
Any links to this specific application? I can't find them which means one of you can do it in about 5 seconds.
I also read about the depressurization of the rail with the thingy on the front of it. Any reason why just pulling the fuse and trying to start it wouldn't do the same thing? Works that way on my Shelby. I did do it today and it didn't crank at all which tells me there wasn't anything in the rail (residual) and that also makes me wonder where the excess fuel is coming from and getting into the oil.
Thanks for your feedback
bj
Power has been fine and nothing feels like it's not now. So, I'm guessing the Techron broke some crap free and I have a little extra pulsewidth on the injector(s)
I'll start there. I have AllDataDIY and have scoured You Tube and Googled and have yet to find anything that gives detailed info on clearing the plastic stuff off the fuel rails. The passenger side has nothing...your basic two bolts. The driver's side, not so much. Plastic cover that goes back to a tube at the firewall and appears to have a connector onto a nipple on the manifold about midway back.
Any links to this specific application? I can't find them which means one of you can do it in about 5 seconds.
I also read about the depressurization of the rail with the thingy on the front of it. Any reason why just pulling the fuse and trying to start it wouldn't do the same thing? Works that way on my Shelby. I did do it today and it didn't crank at all which tells me there wasn't anything in the rail (residual) and that also makes me wonder where the excess fuel is coming from and getting into the oil.
Thanks for your feedback
bj
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Joined: Jun 2014
Posts: 1,036
Likes: 169
From: Portland, Oregon
2019 Jeep Trackhawk, 2002 CLK55, 2014 911 Carrera
On my 2002 CLK55 the black wire loom cover was just strapped to the fuel rail with zipties from the factory. You probably just need to cut two zipties and then pull the wires back to expose the two bolts that hold the fuel rail to the manifold.
As for relieving the pressure, just put a rag under the schrader valve at the front of the rail and poke it with a key or something, just like letting air out of a tire. Then disconnect the feed line and you should be able to pull the rail with all the injectors attached. Be careful not to break any plastic clips back near the MAF sensor, as they grab on to the rail.
As for relieving the pressure, just put a rag under the schrader valve at the front of the rail and poke it with a key or something, just like letting air out of a tire. Then disconnect the feed line and you should be able to pull the rail with all the injectors attached. Be careful not to break any plastic clips back near the MAF sensor, as they grab on to the rail.
Thread Starter
Newbie
Joined: Sep 2019
Posts: 5
Likes: 2
2004 CLK55 AMG Cabriolet
On my 2002 CLK55 the black wire loom cover was just strapped to the fuel rail with zipties from the factory. You probably just need to cut two zipties and then pull the wires back to expose the two bolts that hold the fuel rail to the manifold.
As for relieving the pressure, just put a rag under the schrader valve at the front of the rail and poke it with a key or something, just like letting air out of a tire. Then disconnect the feed line and you should be able to pull the rail with all the injectors attached. Be careful not to break any plastic clips back near the MAF sensor, as they grab on to the rail.
As for relieving the pressure, just put a rag under the schrader valve at the front of the rail and poke it with a key or something, just like letting air out of a tire. Then disconnect the feed line and you should be able to pull the rail with all the injectors attached. Be careful not to break any plastic clips back near the MAF sensor, as they grab on to the rail.
