Possible Dead Fuel Injector

[bemis]

Yeah, so I think I have a dead fuel injector on the #1 cylinder. I kinda noticed this since the idle was alittle different.

The spark plug looks a little damp when i pull it out after the engine has been running.
There is spark.
The compression is perfect.
The fuel injector ohms out perfectly.
But, when I "jump" the fuel injector with the battery, I don't get a click.

I've tried tapping the fuel injector with a screwdriver, with no success.

I guess I will just have to pull the whole fuel rail and see whats up. Just my luck. More FUN!!!

I should probably send another MB injector off to be cleaned and flowtested, if I will need to replace this one.

[G-E]

poke the pintle with a wood kebab skewer, if it moves in and out freely then the solenoid should be able to open it fine, if it clicks or doesn't want to then it's varnished

[Jason84NA2T]

if you do push the pintle, it is highly recommended to take off the pintle cap and push straight down on a flat surface. If the force is at all at an angle, it is VERY easy to damage it enough to render the injector out of spec.

[bemis]

I just got done pulling it out and seeing what was up. Luckily it was #1 injector so all I had to do was loosen the fuel rail and cut a couple hoses, instead of having to pull the whole plenum.

At first, I tried tapping the pintle, but it wouldn't budge. So, I started tapping it upside down and a bunch of sh*t came out. So, I sprayed some Carb Cleaner in the hole and tapped it upside down again. This time more sh*t came out along with the spray, now a rusty color. Sprayed and tapped some more, until it come clean and then tried to tap the pintle again. It now moved. I hooked it up to the battery and I got that clicking sound that I was looking for. 5 minutes later, it was back into the engine. The engine runs perfectly now, especailly with 30 more hp.

I guess some water got into the lines and pooled in the injector long enough to seize it, or the injector cleaning company didnt as good as a job as I had hopped.

If it still gives me trouble, I can just swap it out with the three spare MB injectors I have lying around.

[Firehawk]

You might as well clean the rest, as I doubt that only one injector has gunk in it. Fix it before it causes problems. Remember, running lean under boost is bad.