1997 Dodge Dakota: Crank no Start 

I feel the same about mine.. i dont want to get rid of it , but too many issues makes me want to sell her. She drives wonderful tho. When she's running! V6 3.9l

Hey Usman, nice video. I see you’re getting used to the scope. They’re fun to use, aren’t they? I love have when I have to break one out. Quick tip. So, in the video, when you are connected to the crank sensor, with the scope under the hood, and you go to crank the vehicle; I noticed that you made a recording, so after cranking you can go back to the scope, and see what happened. I’ve been there, lol. Here are 2 solutions for that scenario. 1: press Single Sequence (Single SEQ) on the far right face of the scope, second button down). This will save the cranking signal, and then pause the scope. 2: This is what I normally do. First, bring down your top menu, click Display, click Common, look where it says Roll, and press Enable (I leave it set like this all the time). Once you do this, whenever you you zoom out your time base (bottom middle of screen), once you get out to 200 MS, the waveform will start scrolling from the right of the screen, to the left. At 200 MS, it takes 200 milliseconds for the waveform to go one division (1 square on the screen). There’s 14 divisions (squares) across the screen, so it would take the waveform 2800MS, (2.8 Seconds )to go across the screen. You can slow it down all the way to 1KS per division, ( 1,000 seconds, also equals 16.666 minutes). That’s 3.888 hours to for the waveform to get all the way across the screen. That’s a long time. Just set it to what time you think would be long enough. Or just more than long enough. Then when your done cranking, just go back to the scope pause it, and then zoom in to whatever part of the waveform you want to look at. I know that a lot to read, but I just wanted to be clear. Once I figure this out, it really made things a lot easier for me. So I hope this helps. Good luck out there, and keep up the good work my friend.

Thanks. Same here except something chewed thru my coil wire. I reconnected it with a small wire jumper and taped it up until I can get a new one.

So what led to you checking the coil. I’m working on a 98 Dakota with the 3.9 I have replaced the fuel pump. I have no. Codes stored. I had some miss fire codes to start with. And now I cleared them but still have the no start. I see rpm movement in the gauge I pulled the no1 plug and checked spark there I have spark. But I still can’t seem to figure why it won’t fire. Won’t even pop off on either.

I see your using a scope, I love it... I wish you cranked it with the bad sensor on to see is the signal was gonna get pulled to down, Great video though, Thank you for your time

You mean to tell me you got a fix!😂 Scoping the ground and 5v wasn't really needed, just the signal [I understand why you did it though] jumping the ground and 5v reference with the test light wouldve dimly lit the bulb concluding good circuit after confirming legitimate 5v with Volt meter. Please dont forget to load test, bias voltage is real! You would've got a 360 view by taking your ignition probe on the number 1 and crank signal wire only. Number 1 will only for once 360 degree rotation, thus giving the Patten layout. That pattern initially did look funny, triangular peaks bs square It's strange the coil and crank sensor failed simultaneously! On dodges, they work off falling signal, with that the fuel pump shouldn't activate depending on certain models when it doesn't see the fall of [it's like that for old dodges I know] I say that to say, taking a test light and tapping the signal wire while starting the trick up, will drop the signal tricking the pcm into recognising that falling edge -making an attempt to fire! You could've definitely use that 3rd channel for ignition coil or injector pulse. When crank sensors f-up you'll get neither. Go back and fox the Toyota timing chain 😆 that's what I'm waiting on