I hope your summer's off to a good start. I had a chat with the head mechanic at MB this afternoon and he said I've done everything they'd do at the dealership regarding changing the coil, connector and plug for the PO301 code. He said the next place he'd look would be the injector. He also recommended giving the wiring harness a close scrutiny. Can you imagine the look on my face when the parts guy said an injector costs $342 + taxes ! I asked if that was for all 8 injectors and was told, matter of factly, it was for 1 injector. As you probably know Autohaus has them on sale for $52. Autohaus lists 2 options for injectors. 1 can be installed individually and the other is recommended to install in sets. I'm hoping mine is the former. There's a good D.I.Y. for the fuel filter change but I couldn't find anything for an injector change? I figure at 115,000 miles on original injectors I'd like replace them all eventually.
In answer to your question, the injector has not been pronounced dead !
From what I have heard injectors are virtually indistructable. Even if for some reason it is completely clogged you can have your injectors cleaned. I had mine done at a local shop it was $25 per injector and they flow tested them all for free so I actually only paid for 2 to be cleaned. The actual process for swapping an injector is pretty simple. One thing I would say to watch out for, is to make sure that when removing the injector from the fuel rail realize there is an o ring on top of the injector where it pops into the rail. They have a tendency to pop off the injector and stay in the rail. They also have a lubricant for the o rings to lubricate them when reinstalling it prevents them from tearing. Answer Ohlord first before you get into it. He could probably tell you right away if that is the issue. If you are sure it is the injector I can send you info on how I removed and reinstalled them. If you are having a power issue I have a diagram and could tell you where to check for wire continuity.
Sorry must have been posting at the same time as you. What is happening with your car? Sorry don't have the codes in front of me. Did they tell you a specific injector that is acting up?
I have a PO301 code. (Misfire on cylinder1) Over the last 4 or 5 months I've had similar codes PO302 & PO304, both those problems were corrected with new coils. I've replaced the coil, connector and spark plug on clyinder 1 but the misfire and PO301 code persist. The spark plug I pulled looks in really good condition with no indication of a problem with the cylinder. I must say the misfire seems less severe than it was on previous ocassions with the other cylinders . I haven't driven the car hard since the misfire but it does seem to improve at higher revs. I'll probably go for cleaning the injector this time and pick up new injectors the next time I'm in the U.S. If you have any ideas before I pull the injector I'll be very happy to hear them. That's kind of you to offer more info on pulling the injector as this will be my 1st if I have to pull it.
have you swapped a coil to the number 1 cylinder,and checked it ?then swap a connector and checked it?then swap an injector and checked it?
Most large towns have injector cleaning and repair shops.
Pop it out pop it in watch the o ring and replace it if cracked.
Have you put a mechanics stethoscope and listened to it?it should sound just like the others if not dead or blocked.
ohlord
to ask the obvious and it has happened before(a member spent days or weeks tracking down and swapping stuff all on the wrong cylinder until I told him he was using the drivers side front cylinder as bank 1
bank 1 is passenger side
One thing you also might try before swapping the injector is seafoam. I have seen a few people talk about using it in this forum without any replys saying to avoid it. Someone please jump in if they feel otherwise. Seafoam is very good at removing carbon deposits. You should be able to pick up a bottle at just about any local parts store. Read the directions, pour it into the gas tank and run it for a little while if your injector is plugged it should clean it out pretty well. It should also help clean up your other injectors. Try this first, I will see if I can post the diagram for our motor with an explaination of the wires to check for cylinder 1. On Friday or Saturday I should have my car back together enough to post the procedure that I used to remove my injectors and reinstall them.
I did swap the coil from # 3 cylinder to double check, so I'm certain the problem is not coil, connector or plug related. As per your instructions several months ago ohlord the number 1 cylinder is indeed on the passenger side ! I did use a can of Seafoam 2 months ago. However, I foolishly ran the tank almost dry in a MPG test recently and I may have sucked up some sediment or crap from the tank? Just as soon as I can get under the car I'll change the fuel filter and follow that up by swapping a fuel injector. I'm gaining confidence in swapping the injectors Coug but any help you can provide regarding the procedure will be appreciated.
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