I have a 2002 Powerstroke and all the injectors read 13-17 ohms. I have read should be under 5 what do you guys think?

 

Injectors are usually fired by a coil which has an inductive property. I don't believe you can get an accurate impedance with an Ohm meter. Your going to have to get the voltage and the amperage going through the injector, then e/i=r. So your looking for 5ohm and say it's 15v, you need 3amps going through the coil to have your desired resistance.

 

Might have to take it to a shop not up on all that. thanks for the help

 

If you have a DMM then it's not that bad. http://sites.google.com/site/reax222...attredirects=0

Start with voltage since it's easy. Put the neg probe on the battery and push the pos into the connector. One will have a slightly lower voltage I think, as there should be a voltage drop as the coil is energized and a spike when it's de energized. Amperage is alittle more difficult as you have to cut or disconnect the wire and put the meter in line.

 

Thanks I'll try that this weekend.

 

Welcome to FTE. You are correct, on the 7.3 powerstroke you should have a reading less than 5 ohms if you're taking the reading right. It helps to have a small jumper wire with a clip on the end to check the ohm reading. The flat 9 pin connector at the inboard side of each valve cover uses the front 2 and rear 2 pins for glow plug connections. If you check the center pin against the remaining 4 pins you should get the ohm readings you're looking for.

Since it's not likely that all the injector solenoids went bad at once, you've either got some wiring issues or you're taking the readings wrong. Why are you checking your injectors? Are you trying to chase down a problem?

FYI, we do have a 99 - 03 7.3 diesel section located further down the main forum listing for any of your engine specific questions.

 

Amen to that. The odds of all the injextors having triple the proper resistance on a truck that was probably running a couple of weeks ago is pretty close to zero.....

 

I checked from the center pin and the 4 inboard pins on the harness you are talking about. The truck seems to run ok but seems to be lacking power, of other trucks I have driven. If you push the peddle to the floor the spedo goes up but, if you let off the peddle a bit it seems to go up faster than all the way down. thanks

 

I have only had the truck for a week.

 

You've probably gotten all the information about the injectors that you're going to, even if the proper measurements aren't being take. I.e., you've demonstrated for instance that there isn't just one with a reading wildly different from the others.

Also, you're not complaining about a rough idle or performance, but a generic lack of power. I'd be looking elsewhere at this stage, like maybe clogged fuel filter, etc. Might even see if there's any information to be had from the prior owner. I.e., you're not complaining that the truck is a POS, just that you want to improve upon it. Maybe you can get some maintainance history, etc.

 

I'd agree. Start by making sure you start with fresh fluids and filters, then move on to checking for a boost leak. If all the injector solenoids were bad, the truck wouldn't run. The IDM will shut down a bad injector when it detects a bad solenoid.

 

Thanks I was going to change alll fluids and filters just for my own peice of mind.

 

I replaced the fuel filter, the old filter looked new but I changed it anyway. Do you have any more sugestions?

 

Sure, but first you'll need to tell us exactly what your symptoms are. Truck running or not? Did it stall, or just not start? As much info as you can give us will help us understand where you are so we can offer more suggestions.

 

Truck runs seems to idle ok just seems to be lacking when you get on it.