Powerstroke Diesel IDM mod
IDM connector. All readings for the vehicle should be consistent between each circuit in a range of - Ohms. Nominal solenoid resistance for a Ford L Power Stroke injector is Ohms. NOTE: Each cylinder bank only has one power feed. Additionally, the wires to the injectors are shielded, if you pierce them the harness will be permanentlyFile Size: KB. IDM stands for Injector Driver Module. It acts sort of like an amplifier for a stereo. You couldn't hook up 18" house speakers to a walkman right? The IDM and injectors work similar, injectors require a lot voltage to start up quickly enough and 12V from the battery doesn't cut it.
IDM Models. Printed Circuit Board Details. Component Identification. Completed IDM Schematic. Sub-Circuit Analysis. Injector Waveforms. The A, Right, Top used in and early trucks, has a completely different layout compared to all the later models.
Its layout is extremely disorganized, with components that make up one sub-circuit often scattered around on opposite ends of the board. The boards consist of 4 layers of copper, from which the traces are cut: the top and bottom layers are visible, the 2 inner layers are sandwiched in the middle between insulating layers of epoxy reinforced fiberglass. Note that very few of the PCB traces are visible in the and as compared to the A.
Although the later models do have fewer traces, they also have many of the traces run between the layers of the board, giving better shielding from electro-magnetic radiation. There are 4 basic IDM models: the A,and The square cutouts in the boards are where heat sinks are fastened to the bottom of the case. The round hole is how to calculate apr on credit card the heat sink of one of the inductors coils for the V power supply.
Oct 16, · They have the idm hidden pretty good so i decided to show you where it is, mine ended up not being the idm, part of the valve cover harness had come unplugg. Nov 12, · I have a Ford F with a couple of different codes. It has an IDM failure code, and, injectors one and eight fail an injector buzz test. When the truck is started in the mornings it runs very sluggish until it is floored and then it begins to run right, it also runs rough and lopes at. With the powerstroke, they use high pressure oil to boost the injection of the fuel, but that's triggered with an electronic signal. The IDM fires the fuel injectors, and it's a fairly high voltage signal compared to what's in the car, so it will boost up the voltage, and then .
Mark: Hi, it's Mark Bossert here. Producer of the Pawlik Automotive Podcast this morning, and we're talking trucks. How are you doing this morning Bernie? Mark: We're going to talk about a Ford E, 7. What was going on with this diesel vehicle? Bernie: This vehicle, the IDM to start with, stands for Ignition Driver Module, and what was going on with the vehicle is that it would stall out or it would be driving fine, and all of a sudden start running poorly, lack power, really wouldn't go anywhere, barely limp along or as I said stall out.
It definitely had some serious driving issues. Bernie: What it does is it actually fires the fuel injector. With the powerstroke, they use high pressure oil to boost the injection of the fuel, but that's triggered with an electronic signal. The IDM fires the fuel injectors, and it's a fairly high voltage signal compared to what's in the car, so it will boost up the voltage, and then fire the injectors whenever the computer commands.
Bernie: As I said, it would stall out. When the engine was running, it would run fine for a while, and then all of a sudden it would just start running poorly, misfiring, stalling, lack of power. As far as diagnostics, some of the tests we did on it, we had a little bit of history with this vehicle previously. We've been servicing it for quite a while back. About six months ago, we replaced all the fuel injectors because there was issues with the injectors.
We knew that those items were good and based on the symptoms when the vehicle did start running poorly, we could see it was a complete engine failure, if you know what I mean, as opposed to individual cylinder. That would be just sort of a rough shake. But because of just the severe lack of power, I figured it's a more overall issue. Next of course, scan the vehicle computer.
Bernie: No. That was it. I'll actually show you some pictures. It's interesting to show what we actually found. We did replace the IDM. That is the IDM. The old one here. Pretty ugly, crusty looking part. This is on the floor of my shop, so it's a speckled concrete floor. It's a weird background, but the electrical connectors go in here, and this is the body of the module.
You can see this little button piece that's slipped out, and there's a lot of corrosion around here. A surefire indicator that there is water inside the module, and water in the module is a very common issue.
As a matter of fact, you can see a little bit of moisture here. This is after we drained a lot of water out of it. This piece had popped out of place. Water had seeped into the module, and that was why it was behaving the way it was. Sometimes it would be fine, other times water would slosh around, and of course start short circuiting, and it wouldn't fire the injectors properly. Now, why would water get in the module? This module is not particularly located in a fantastic spot.
There's the under hood view. There's the new IDM right there, and you can see that this is on the edge of the hood rail, it's on the edge of the cowl here where water can run right down here right on top of the module. Not an exactly brilliant spot to have an electronic component. And there is another closer view of again the IDM.
The yellow arrows are just indicating that's where water will run down on the unit or from this area here. Mark: We would assume these modules are well sealed to deal with water. Is there preventative measures that would have helped prevent the damage? Bernie: First off, yeah. They are really well sealed. This truck is I would say that module is definitely the original, and it's now, so that's 17 years of use.
That's a long time. But yes, could it be better? They could put some shielding, and covering over top of it. One could fashion a tin plate or maybe a plastic shield over top to allow the water to run off. We haven't done that, but it's certainly something that you could do for extra preventative measure.
One thing, if you ever did something like that, make sure you give some breathing room because this module will generate heat, and it needs to dissipate the heat. That's something important. But yeah. Definitely something that could be done. Had water not run on this module? This vehicle would still be running. Clearly, it did kill it at a premature age.
Mark: We've talked a lot about different versions of Ford powerstroke diesels. It's a V8 diesel. How are these 7. Bernie: 7. There's not a lot of problems that happen with them. The injectors generally last a long time.
There are a few concerns with them, but generally compared to their newer versions, especially the six litre, it's very reliable engine. Of course, it is noisy. It's kind of stinky. It doesn't have the lower emission qualities that the newer versions have, and it's a lot noisier, but it is a good powerful diesel, and its reliability is quite amazing.
Definitely a better version, but a little older. You're going to have to be putting up with the rattling noise. Some people actually like that because it does gives you a feel of you're actually running diesel. And they still work well. This vehicle is 18 years old, and you still got lots of life left in it. An 18 year old van with a gas motor at this point is probably not worth a whole lot of money, but a diesel is still worthwhile to keep going. Mark: There you go. If you're looking for service for your 7.
You can reach them at to book your appointment or check out their website. Lots of articles, and videos on there as well as on our YouTube channel. Pawlik Auto Repair or on our Podcast. Hope you're enjoying it. Thanks a lot Bernie. In order to provide an estimate , a diagnosis is the next step! Bernie: I'm doing very well. Mark: What is an Ignition Driver Module?
What does it do? Mark: What symptoms was happening with the van? Mark: Did you find anything else that was going on once you've replaced the IDM? Bernie: Thanks Mark. Thanks for listening, and watching. Let's Discuss Your Vehicle Book an Appointment Here.