E63 P0304 code problem, Having a heart attack please help
Thread Starter
Junior Member
Joined: Dec 2008
Posts: 51
Likes: 0
From: Peabody, MA
2004 CLK500. 2004 E55. Current 2008 E63
Hey Guys,
So I got my car back last Tuesday and it was running fine, until Saturday I noticed it idling very rough again and sure enough I pulled out of my drive way and check engine light and gas smell and I shut her right down. It happened again now to fuel injector #7 was gone and hydrolocked again. Went thought the hole 9 again engine was fine. That is 2 near misses now. I ended up replacing all remaining 7 injectors. I am not sure but I feel like there is something else causing the issue and it is just going to happen again.
So my question is, what would be causing this?
I have been reading all about this Head Bolt issue. Could that be the reason the fuel injectors were going? Do you have any advice, I had lucked out twice now not ruining any rods or interior guts of my motor.
Thanks any information would be appreciated again guys.
So I got my car back last Tuesday and it was running fine, until Saturday I noticed it idling very rough again and sure enough I pulled out of my drive way and check engine light and gas smell and I shut her right down. It happened again now to fuel injector #7 was gone and hydrolocked again. Went thought the hole 9 again engine was fine. That is 2 near misses now. I ended up replacing all remaining 7 injectors. I am not sure but I feel like there is something else causing the issue and it is just going to happen again.
So my question is, what would be causing this?
I have been reading all about this Head Bolt issue. Could that be the reason the fuel injectors were going? Do you have any advice, I had lucked out twice now not ruining any rods or interior guts of my motor.
Thanks any information would be appreciated again guys.
MBWorld Fanatic!
Joined: Dec 2014
Posts: 1,236
Likes: 72
From: Indianapolis
2004 E55.98 SS Camaro.Jetta TDI. Expedition
I'm sorry. Thought you were in the clear. Seems like the first generation e63's are headaches . They have a lot of problems and are VERY hard too mod.you have my sympathy and I hope it works out. iMO AMG missed their mark on that car. I own an e55 and I can't afford to keep an E63na on the road.
Senior Member
Joined: May 2007
Posts: 261
Likes: 10
From: S JERSEY/PHILLY
2007 mercedes e63, 2006 bmw 530 Xi with Mtech kit , 2005 ford expedition
To the OP, whatever happened? I swear the more I read about these engines the more uneasy I get about my newly acquired e63.. and the funny thing is.. my negative Experience with Mercedes was basically electrical .. never engine related... Mercedes engines to me were always work horses but these seem to b no were near that.. and even with my e63 the previous owner had lifters changed and Valve cover gaskets done twice..
