Ivan I have followed your videos for years & am a relative newcomer to Bernie’s channel. He is awesome & this was a fantastic find, yet I see it has gotten 5 thumbs down 👎. They must be mad or silly🤔
NO SHOT you would be able to see something like this without the tools you have at hand. This is crazy. Great stuff. Your a legend for showing people things like this.
Totally amazing! He said he was working with scopes since the 80s. Wow! Now some shops say it’s a waste of time. Looks to me there is still a lot of shooting from the hip. I commend Bernie and all the Techs who get it right the first time even if it takes longer. Thanks again Bernie!
Hi Bernie, This was an amazing diagnosis and the use of the decade box was a masterpiece!! I just order the Escope Elite 8 channel full kit, can't wait to use it! Coming soon on my channel!
Thank you so much Bernie for this video! I just recently did a timing chain job on my Mustang 4.0L and I had the same issue and code. I had to grind down the timing cover so the crank sensor would align with the tone ring. Now the engine runs smooth. Thank you sir!
Awesome awesome diagnosis. Something most people, even with the use of a scope, wouldn't have picked up on. Its great to see some advanced diagnosis to know what to look for and help us think outside the box. Thank you
Thanks Bernie for explaining why this computer shut off the injectors. It was obvious once the scope had shown the pattern and you explained it. The decade box enhanced the operation which then shows the problem........priceless!
Bernie you're amazing! First time I see the add value of using a capacitance box in a car system, I've been using this to fix a lot of Computer motherboards and plasma tv boards among other things but the use in a car signal is amazing! Thank you!
Untill this video, I had never even heard of a Decade capacitance box. I pretty much have to agree w A LOT of other comments, I SERIOUSLY doubt if I could have properly diagnosed this. Awesome awesome, as always!!!
Love your stuff man. I'm feeling the Bern. I'll be getting the Escan first to hook up to my Toughbook. Then on to the escope to start in cylinder pressure diag.
Had a similar problem on a 97 manual jeep had to space it out 2/32 to gap it . The engine had 200k on it an the thrust washers were worn out an the crank had enough play to push the pick up away from the crank sensor
you sir are a lifesaver !! i swap all timming comonats on one of these junks, a month later this problem manifest, been pulling my hair out!! and whil i do have snapon modis, i hate sylliscope setup, and may have missed this subtle wave deformity anyway< but a quick visual varif path of center relucter wheel too close to center sensor , i believ what happen is over time cheap makeshift afterthout ckp sensor braket get heat distorted ! JUNK ! but some quick adjustment to t-covor and grind sharp edge off of half tooth and she runs perfectt !! GOOD FIND THANK YOU !
As you can see from the video, making a robust VRS zero cross detection circuit is not trivial. In looking at the waveforms, the VRS sensor has a DC bias voltage from the EDIS system. This is an attempt to make a virtual ground front end interface circuit that is less expensive to design as compared to a dual supply circuit where there is no virtual ground, ground is 0 Volts (the VRS is just a low impedance AC source which means it will work with a virtual ground or an actual ground, 0 Volts). Also, you can see how critical it is for the sensor and target to be OEM and to have the proper clearance and center position. The magnetics of the target and sensor, even if correctly positioned, produces some interesting magnetic effects. For example, the mechanical position of the target wheel may not translate to the actual sensor output trigger point. There is actually a little bit of magnetic skew. You can see this if you put a very high resolution instrumentation grade optical encoder on the crank and then compare to this what the actual aero cross is indicating. You can also see some magnetic shift, as compared to the true mechanical position, as you increase RPMs. So, the lesson here is when you move away from OEM targets and sensors, you can actually introduce a fault.
very interesting to say the least. I was thinking about a pico scope but now I'm lean to this E scope. I just am thinking about so many user friendly features.
Very nice diagnostic work; thank you for sharing. I see your capacitance decade box appears to simply be attached to the signal output backprobe via a gator-clip. How does this effect the signal as seen by the engine computer? My assumption would be additional capacitance acts as a "pull down" on the circuit, which implies the box could be installed anywhere on the output side to clean up the signal, including at any point on your scope test lead?
Amazing Diag lesson and well explained, thanks for sharing, I have a question please , what setting have you got your decaebox on ? I didn’t know were you add resistance or voltage to that signal wire . Thanks
Whats the explanation for the housing protruding excessively at all ? It does not make sense that the housing had to be ground down , and if so, the car would have had the fault since it left the factory.
The battery cables look like a complete hack. It looks like the alternator power output cable is missing its fusible link(s). I think on this year Mustang the CNK VRS signal is conditioned by the EDIS ignition (coil packs) and a PIP signal is then sent to PCM as a reference. You should look at the PIP signal to the PCM to see if it drops out. I think the CAM signal goes directly to the PCM and is not needed by the EDIS during crank because the coil packs fire two plugs on opposing sides of the firing order (no CAM information is needed), which is doable because the engine timing is even firing (symmetric). It would really be helpful if a wiring diagram was reviewed as part of the diagnosis.
my guys cant find issue on my 08..have changed cam and crank sensors..dint know what theyre doing next..i am beside myself worrying over whether they will give up on repair!!😢
Pretty sure I may not have even noticed the bump.... I guess this is how the ECU's are engineered with a specific threshold and internal filtering....just with your own switches :)
Was that trigger wheel original or replaced ? If replaced , was it OEM or some " white box " crap ? Or , as mentioned - Dorman ? Just imagine if it was never engineered properly or a mold that gets out of tolerance when run thousands of times . Think of all the vehicles that had problems and the parts cannon - including ECM replacement ! And they were NEVER fixed !
