Finding an intermittent

Finding an intermittent problem is probably the most frustrating thing we do. And because of that, it's also probably the problem that get's the most parts "thrown" at it. Remember this. The intermittent problem does have a cause. All we have to do is stop guessing and look for evidence. Follow the evidence and it will lead you to the problem.

Category:

Autos & Vehicles

Tags:

• diagnostics
• auto
• repair
• intermittent
• troubleshooting
• verus
• scanner
• testing

[jtech23]

i see you have a teslite tool, the yellow lead that you were probing the ecm connector with. Do they work like they are supposed to?

Thanks.

[realfixesrealfast]

@jtech23 yes, they work  great

[seapeddler]

If Dragon Speaking were hooked up to the onboard computer. The computer would tell you where it feels the problem is. Codes are cool, but time consuming. GM is working to fix the code for rear-ending a semi trailer at 40 mph. The A-pillars have to be immensely strengthened. Until then I will stick with my trusty dog sled team.

[Mikej1592]

when it comes to throwing a part at it and that part is $500+-$ you should always check voltages and wireing continuity it has been my experience with my car that it is generally 1st bad conector, 2nd bad sensor, 3rd bad wireing. Unless you had some electrical failure like a regulator that shot pure alt. voltage through your system, happened to me once, or you connect your battery backwards because the new ones posts were swapped then your componants/computer should be OK. just my exp.

[Gizmopflege]

Awesome video! Real Expert doing thorough job.

[davelowe1977]

This is a classic demonstration showing the difference between a 'fitter' (of parts), and a mechanic. The latter diagnoses and repairs and can apply problem solving techniques to any situation. Unfortunately, these days, they are a rare commodity. My guess is that a 'fitter' would replace the coolant sensor, then the computer, then the wiring loom before getting to the bottom of the problem - and the customer would have a far higher bill. Nice work!

[NoSleepRacing]

great videos I have been needing to brush up on all this :)

[boaterbil]

@Colombianfunk I have been a certified tech for 45 years. The common problem is that the customer does not want to pay for your diagnostic time. As you see in this video, It can be a long tedious task to diagnose an intermittent problem. I think ALL customers should see this video. Thanks, Bill

[frogca]

I just took automotive electrical last semester and I wish this guy taught the class. This a perfect example of how the world of automotive repair is not your father's automotive repair. You need serious equipment and technical knowledge to work on today's automobile. We have guys dropping out like flies because they think they just need a wrench and hammer and they're good. No way Jack, this guy is showing what it's all about.

[MrSoundQndn]

Wow one friggin wire is all it took... Glad you found it.. I had a problem like this on a cousin's Neon and it ran weird all up until the wire was found and repaired now it runs like a champ.. Thanks for uploading!

[dmorley100]

The wire insulation piercing test probes at 11:12, did you get those off the Mac truck? If so, could you give me the tool number please. I know Mac makes screw-in insulation piercing test probes but my Mac man can't find the tool number for them.

[xxioryyagamixx]

man this is the best vedoe so far!!!!!!!!!!!!!!!!!

your the man!!!!!

wish i could work at ur shop and learn from u

i have a 2002 ford focus 1.8 sohc

keep getting this P0720-P0721 and P0722 all about the out put shaft speeed sensor.

also the speedometer comes and goes intermittent. not to mention that the transmission ocassionally shifts to neutral while driving and wont kick back into gear unless i sow down to atleast 20mph.

please help