Fuel injector gone bad Options

[troth]

Vehicle was running great until I lost cylinder no. 2! Verified spark was good. Hmmm... must not be getting fuel. Swapped injectors with one of the good cylinders and was happy to see the issue moved with the injector.

I guess I'm going to shell out to have them all cleaned again. Even though I just did that less than 3000 miles ago. I say all because when I unplugged the injectors individually with the motor idling, each had varying effects on how it ran. So some of the others in addition to no. 2 may also be dirty?

But what could have caused them to go bad all of a sudden? One day it was good, but then the next day when I go to take it to work it's crap. I have read that letting the fuel level get too low can dislodge crud in the tank. It had about 3 gallons in it last time it was running well and it has certainly ran on less fuel than that before. Should the filter be replaced? Is it worth taking the tank out and cleaning it?

Lots of questions, but I am happy the immediate issue presented itself so quickly. I'm just trying to diagnose the root cause to avoid another $100 injector cleaning/test.

[stinkindiesel]

Keep in mind that measuring voltage on a circuit that uses a resistor to drop the voltage will measure the full voltage when open circuit, but will measure correctly under load. It's entirely possible you measured 12V on the injector wiring with the injector unplugged. Remember, no current flow, no voltage drop.

Gary

[troth]

Keep in mind that measuring voltage on a circuit that uses a resistor to drop the voltage will measure the full voltage when open circuit, but will measure correctly under load. It's entirely possible you measured 12V on the injector wiring with the injector unplugged. Remember, no current flow, no voltage drop.

Gary

Ok, this makes me feel a little better. I'm fairly certain on that steady 12 V reading. The injectors all are within spec for the resistance (think it's 1.6 ohms iirc) so I don't think anythings fried.

mepstein, I was using the MMO for awhile but haven't been the last maybe 2k miles. The POR15 is already on its way so I think I'm going to use it just to get my money's worth. Unless y'all know of any damage it can do?

Here's some pics of the tank so you can judge for yourself.

(IMG:http://www.914world.com/bbs2/uploads_offsite/i1120.photobucket.com-20305-1499227737.1.jpg)

(IMG:http://www.914world.com/bbs2/uploads_offsite/i1120.photobucket.com-20305-1499227737.2.jpg)

The "garage"...

(IMG:http://www.914world.com/bbs2/uploads_offsite/i1120.photobucket.com-20305-1499227737.3.jpg)

And one without the cover. (IMG:style_emoticons/default/biggrin.gif)

(IMG:http://www.914world.com/bbs2/uploads_offsite/i1120.photobucket.com-20305-1499227738.4.jpg)

PS can anybody tell me what this plug on the driver side of the rear trunk goes to? I presume it's for some optional component I don't have...

(IMG:http://www.914world.com/bbs2/uploads_offsite/i1120.photobucket.com-20305-1499227738.5.jpg)

[BeatNavy]

The POR15 is already on its way so I think I'm going to use it just to get my money's worth. Unless y'all know of any damage it can do?

Some people love POR15, some people hate it. I think it's all in the prep. I've done two gas tanks, and one turned out well, and the other not so much. I'm pretty sure I was rushing the prep on the second one (had to get to a kid's sporting event or something...). The one that DID turn out well I've been running for several years now with no issues.

Take your time and really follow the instructions closely. Do your best to agitate the tank and knock as much of the loose rust and tar off as possible. If you do it right, it should work well (IMHO).