How Crankshaft Position Sensors Work :: EFI Explained by Matt @ M-Tech Automotive

[@INTERNA9]

Awesome video!

[@nolvertogonzales6964]

Thank you... great work on the editing straight to the point. Job well Done.

[@Jigaboo123456]

First class-very clearly explained, and with equally clear speech. I watched a clip previously which had a mind-numbing and irritating soundtrack that overwhelmed the presenter's dull, quite monotone. I gave up, and ended up here--result! Thanks for making and posting this.

[@atomicdmt8763]

thanks! i recently put in a NEW (but bad) CKP sensor and its apparently shorted internally- screwing up my fuel level gauge, ignition coil/ignitor(?) and setting off a host of other selonoids- et al! I cleaned all grounds, rebuilt my fuse box, new ECU, cleaned everything........no changes UNTIL i just now decided to swap back in the old CKP sensor. All the electrical clicking, etc went away immediately and Im not going thru the KEY RELEARN process for the new ECU

[@miriammaldonado7848]

My nephew's car didn't past the emissions test being this one the reason, I just wanted to what was it, thanks for your clear explanation!

[@gerardledet7233]

Love this clearly explained I watch and understand how it works thanks very helpful

[@damiancook6753]

cheers man for this, used it for my collage work

[@ginnahushehwesimba5394]

thank M tech Automotive yu are really helping us in our school study....

[@themtechzone]

+Ginnah Ushehwesimba No problem :)

[@panasebrandonkatanharyderk4812]

first class clearly explained .a great explanation

[@mathewboyd3746]

Brilliant and very clear explanation. You seem to have a lot of experience with various OEM and aftermarket EFI set up. In your opinion which aftermarket EFI would you chooses for best reliability for the costs for a street performance 4 cylinder engine in a hot climate? Not sure if it would be single throttle body or quad as yet. I realize what technology is always improving

[@mtechautomotive]

Hi thanks - me442 ecu everytime!

[@mathewboyd3746]

@@mtechautomotive I never heard of me442 ecu before? Who makes these ecu? what components do they supply? Is there a website to find out more and details etc?

[@ramjet4025]

Excellent video. Thank you.

[@adnanjaved1723]

hi.....its really informative video....thank you so much for sharing such data to us.........but in this video u did not tell that how to check sensor working through multimeter ,,,or through tester

[@voltronicug]

Nice job.I am manubo adinan from Uganda East African. My question is,what could be the broblem when or if my my car missfires

[@Grimerzz4life]

excellent!! i understand it now finally lol thanks for the video

[@djbear6919]

Awesome explanation ✅

[@themtechzone]

Jay, thanks for the feedback, comments like that make it worth doing! If theres any particular subject you want me to go over let me know :)

[@davidhenriquez9562]

can a faulty crank shaft position sensor cause my car to staul while driving and at a red light etc.vw passat 2006 2.0t

[@themtechzone]

David Henriquez David yes it can - does the rev counter drop at the same time? Do a scan with an OBD tool a fault should of been stored,,,

[@jamesmanoni]

Hey great video, you mentioned sensors having to be at certain angles from tdc, I have a nissan vk45dd I wish to put in another vehicle but have nowhere to locate the sensor yet, it has a missing tooth so might the nissan ecu pick up the pattern at whatever angle I locate it he sensor, say under the motor as opposed to some other location?

[@stephenrogers5386]

Very helpful, thanks!

[@alexavila5061]

necesitamos esta informacion en español tambien gracias

[@aidantuckwell9191]

Really good video, I have now subscribed! I always assumed the general function of the crank sensor but needed some specifics for some troubleshooting with my car, and this video was exactly what I needed. It gave detailed information, and yet I think even a complete mechanical novice would understand it.

[@themtechzone]

Thanks - we plan to make more vids in 2017 when time allows!

[@thobedisithole1720]

THOSE THE CRANKSHAFT SENSOR WORK AS A DISTRIBUTOR WHERE IT DISTRIBUTE POWER ACCORDING TO HOW FAR IT IS FROM THE OFFSET, FOR EXAMPLE SAME CARS U COUNT 16 TEETH FOR IT TO SOUND RIGHT. SO IF AM TO TAKE IT BACK A BIT OR FORWARD WILL IT AFFECT THE FIRING SYSTEM LIKE A DISTRIBUTOR

[@pdechent]

Hi. I am doing a manual transmission swap in a platform that has not been fully tested before (350z manual transmission in a Titan truck). If I have to move the sensor do I also need to rotate the sensor ring accordingly? E.g. The oem location for the sensor is at 7 o'clock and the new location o must move it to for my application is at 5 oclock. From what I understand to allow the Ecu to accurately read the crank position I will need to rotate the timing ring so that it is in line with the new location of the sensor. Is this correct?

[@thehegt]

Why do I have metal shaving on my crankshaft sensor ?

[@arunkrishnamoorthytamil]

Bro kindly give your notes it's useful for us

[@irfaan_ayoob]

Thanks very much

[@jaypalmer1257]

i installed a new transmission but had to turn flex plate to bolt to torque converter now car will not start, is this because its out of sync ? I have replaced crank position sensor, but could a 1 inch out of sync cause no start?

[@oibal60]

Good explanation!

[@michaelmichael3126]

so the senor causes high Rev and no power or just stalling problem?

[@olafzijnbuis]

All very well, but at at 1:36 you have NOT mentioned a crucial part: the MAGNET. Without the magnet there is no change in the field and thus no output pulses. The magnet magnetizes the core. The passing teeth influence the magnetic flow. This CHANGE in magnetic field generates a voltage in the coil.

[@stevenbean4219]

olafzijnbuis these sensors are the dumbest invention they ever created swap the ignition to a magneto type ignition if they want precision and save people the aggrivating of dealing with these pieces of junk

[@imnottrippin]

Ferrite = magnet

[@hooperdavid1980]

my mom needs help she is a senior citizen and can't get her truck started and doesn't have alot of money and I don't have much to help either I put new spark plugs and wires, camshaft position sensor, crankshaft position sensor, ignition coil since those didnt cost alot from rockauto still nothing it cranks but doesn't seem to get spark the rpm needle moves when trying to start and the check engine light goes off when trying to start when you stop trying to start check engine light comes back on only other thing I can think it is is the pcm not being told to tell the spark plugs to spark but don't have a way to know of I'm right before buying 1 of them please help I dont know what else to look for Unless someone in michigan that can come help appreciate it Or any ideal what else I should check Some people say fuel pump but I wouldn't think that would stop spark but not the best mechanically inclined 2004 ford ranger xlt 3.0 v6

[@maybach300c]

How does crankshaft position sensor know the engine is at intake stroke (when the intake valves open) and activate the fuel injector ?

[@chanakyasinha8046]

As far as i know, the gear on which sensor is going for reading have 2:1 ratio geared to the crankshaft, meaning the gear connected to crankshaft rotates twice while the gear on which reading is to be taken rotates once, hence this way it is transmiting correct timing

[@sajidullah]

Sir, i dont measure any ohms ( infinite ) between any of the three pins on my bosch sensor for my 1999 ferrari F355 ...does it mean an open coil circuit and bad sensor ? What else is there in these sensors ?

[@mariadeane4954]

Sajid Rafique

[@omarfadhil4310]

how much the coil resistance must read

[@leoa4c]

The EMS knows the crank position, but how does it know which piston to inject?

[@rocketpig1914]

It knows where it is based on the gap

[@tajhealthnature8570]

Thanks

[@manuelesmejorquetu6922]

Subscribed

[@vanglorious585]

So the trigger wheel has nothing to do with the crank pulley ?

[@themtechzone]

Hi - well it does and it doesent - some engines have the trigger wheel on the crank pulley (older BMWs for example) but most now have it integral to the flywheel

[@vanglorious585]

I see that motec systems use CRIP. in which they use index tooth as reference rather than the missing tooth for tdc. So does the number of teeth on the trigger wheel is related to precision of ignition and injection events?

[@themtechzone]

Auto takumi It depends hjow they base the timing for events - from the last tooth or the last 'TDC' - from the last tooth would give higher accuracy AS LONG as you compensate for delta rates of changing crank speeds (is a TDC based system takes an average) Generaly a goog timing algorithm would take advantage of both, and also have a predictior based on ingition angle (which then causes crank acceleratrion) to compensate :)

[@dannymartinez8314]

If there was broken teeth, where it was evidence that they were broken, what would that cause?

[@totalstranger9563]

Isn’t this what your distributor once did.

[@christiantrezelle793]

What would happen if it's missing a tooth

[@stevenbean4219]

Crank position sensors and every other crazy sensor is a waste of engineering excellence and only makes automotive manufacturers look like dumb asses. I can build you a motor with none of these retarded sensors that will run a few hundred thousand miles with zero issues because it's kept simple with none of these sensors.

[@I.T-AccountingServicesJamaica]

Great video..(As a novice I fully understand your explaination 10/10).. have a question ...what could possibly cause this senario...after changing 3 CrankSensors in my Prado 1KZ-TE Diesel 1998 Engine... at idle, stop or slow speed engine light comes on...once driving the engine light goes out. The engine light is being triggered by the crank shaft sensor... what is it that my mechanic may have overlooked to correct this engine rebuild issue?

[@laurenceleeroceta8772]

Did you scan your car for any fault codes.... Pls. let me know, i think if im not mistaken tha issue cross on my path....

[@HyttmanTjsmma]

can a bad fly wheel cause a new crank position sensor to go bad within a year.. changed my fly wheel and car runs good but now I'm getting a crank position sensor code coming up

[@themtechzone]

Hmm maybe if corrsion has built up - crank position code might be just a sensor failure or the flyhweel is damaged, the ECU cant tell which...