Last week my truck threw me a DTC P2146.....awesome right?! I just removed my VC to ohm my injectors. They all ohm at .9 to 1.1 except one. It ohmed at 1.9.....so is this my bad injector?? I ohmed alll my wires going to the harnesses as well, and they are all good. Here are my other questions....is it necessary to remove the fuel lines, high pressure lines, intake manifold, heater grid, MAP and RPS just to take out the one injector?!? I cannot afford all new injectors, as much as I want to!! Where is the best place to get a new one?? Thanks in advance!!

 

That may or may not be the bad one. that only tests for bad solenoids. mine all ohm'd fine, but were bad internally. 3 were shot and other 3 were so so. my best suggestion is to take all out to diesel injection shop and have them tested. i went with bosch remans form the bosch dealer. 335$ each. he didnt charge me for testing since i bought them from him.

 

Anything over 1.0 is not good. So you got two that are bad from excess fuel return (DDP told me themselves why the solenoids go bad). And if one of em is #1 or #2, then your going to have to remove the intake horn and grid heater. The injector line, connecting tube hold down nut, connecting tube itself, exhaust rocker assembly, valve cover, and integrated gasket (if an 06 or 07) are a given and have to be removed.

 

I kept reading that most ohm out to under .05, but depending on the meter used, up to 1.2 can be ok. All my wires going to the harnesses read .9. I think it was #1 injector (closest to the front of the truck) that was reading 1.9. The truck only threw the code that one time, and idled kinda rough for about 5 seconds. Since then, it has no codes and runs perfect......should I still look into getting the injectors looked at!?

 

Are you using a DVOM such as a Fluke? good injectors should be less then 1 ohm and more the 0 ohms. I usually get reading .2 or .3 ohms on good injectors, maybe you need to calibrate your meter. The wires usually break loose on the valve cover gastket. If you have the old style gastket that is. Cut the little black plastic tie strap and wiggle the wire it most likely will come off in your hand. Replace gastket along with the bad injector that reads over 1 ohm. Be very careful when tightening the connectors they will break off if too much torque is applied. If too loose the connection will arc and melt the small brass stud off the injector. Don't ask me why I know these things
(11 in. lbs.) torque

 

My meter is actually a real POS to be honest. Its a cheapy I acquired from who knows where, but its all I have! Are you talking about the connectors on top of the injector?? When putting the wires back on today, I did notice they never got really tight, so I got them snug and called it good.

 

The two 8mm nuts on top of injector, be careful with those. They are brass and will break off without much torque on them 11 inch lbs max. The two holddown bolts are 89 in lbs and the fuel injector tubes in the head are 37 ft lbs.

 

That will skew the results. You need a meter accurate to at least .5 ohms. By the spec ALL your injectors are bad, they should be .2 to .5 ohms with the VC wires disconnected, VC harness should be .5 or less on every circuit. Combined solenoid and harness should be .7 ohms or less with a meter accurate to .01 ohms.

From the description, you have a bad injector solenoid that is intermitting. Likely it is #1 from the readings but you really need a better DVOM to test correctly.

 

I took the truck to the best diesel mechanic in town. he said it was most likely my flashpaq messin with my computer in the truck. Since I reset the truck back to stock, the truck runs flawlessly with no issues. He also said that the difference between 1.0 and 1.9 ohms on the injector isnt enough of a difference to call the it faulty, and wasnt at all phased regarding the injectors all being measured at 1.0 ohms. I truly hope that my injectors are all fine, as I dont have the funds to replace any of them!! I guess I still have the option to remove them all and have them tested......but then I will want to replace them all with new ones regardless!!! Ha ha!!

 

the ohm test only tests the coil portion of the injector, the coil may be good, passing that test does not guarantee the fuel part of the injector is good.

 

Update your signature so we can see what you have. We could have been alot more help if we would have known you had a modded truck.

 

Ok, now the sig is updated!! Sorry. I dont know a ton about these trucks, so Im not sure if all roads are leading to injectors here. The truck runs great, but when I start it, it will act like it wants to die out for a split second, then get a quick surge of fuel and idle normal agian. Last friday, it just died, now its not dying.

 

FCA? Maybe?

 

This will reveal my true LACK of knowledge but....whats an FCA?

 

Fuel Control Actuator. It is the black cylinder sticking off of the CP3 (Fuel injection pump)