This video is to show that resistance checking doesn't prove plug performance. The video is not a tutorial on how to remove and install glow plugs ie: i do not discuss engine warm or cold, reamers, anti-size etc...

Cheers Dave, enjoyed that wee video , just waited to everyone went to bed so I could watch it on my big TV. I'm starting to understand more now on the pico , brilliant bit of kit , cheers , Ian 👍

Thanks for another quality video Dave, it’s info like the colour coding on glow plugs that’s invaluable. I’ve seen plenty of burned out plugs by people pushing 12v at them with these cheap glow plug testing devices.

Find the items that are used on the Dave Sterl channel in the Amazon shop. www.amazon.co.uk/shop/davesterl

I always get the fear changing glow plugs lol one of those "quick" jobs that can become a very long one. Good video dave 👍

Always nice to watch some diesel work.. and that scope🤗. nice job dave..

done clutch and flywheel few days after christmas a pig of a job. and the car wont to a regen with them fault codes also . thanks for sharing dave

Nice demonstration of the glow plug PWM and current draw (or lack of it in cyl 1)

I hate doing glow plugs because nearly always one of them leaves the tip broken off in the head.. Maybe its just my luck. I believe if you pull the glow plugs at around 100,000km you'll have less chance of running in trouble. Most problems I get is due carbon build up when the plug is not working. So I pull them while there still working.. Totally personal choice on this one..

Nice diagnosis Dave, Very informative Video,,

very nice video, to see a glow plug on a waveform.

Excellent demo as usual 👍

great video an content as always Dave ,you explain things very clearly ,thanks for sharing your time and knowledge rob mobileman

R these plugs not got sensors on them seen sim 2.0 cdti got different ones

Fantastic demo Dave....

Nice job brother i gotta do mine in my daily 328D not looking forward to it LOL I hear the injectiors are like an act of god. I don’t do many common rails only gasers. Happy new year’s my friend

Great video! I have no.2 glow plug fault, I’m unsure if I have sensored glow plugs or non sensored. Mine too is a 2.0 tdci Zafira tourer.

dave i was thinking you where over overcomplicating it with the scope . but it was very interesting to see to pwm

Very informative, thanks

I too having the same warning message in my 2013 Zafira ecoflex. Also getting engine vibration at times only while accelerating at high speed on motorway. Cityride is normal. Not sure what's the problem

Iv got same car same engine same year but my plugs are pressure sensor ones are yours ?

Ah...I see. It’s duty cycled in order to attain the “4.4V” rated value. Never realized that. Virtually no diesel experience. Interesting. Cheers Dave 👍

Please what scanner( tool) did you use and how do I get or download the Vauxhall Zafira Tourer C 2013 software ?

Thanks for that video. Really useful!. I have the exact same car and it was not starting properly on occasions. Other times it was struggling to get up to any decent speed very quickly. Did an obd and got the same as you got for cylinder 1,2 & 4. How much should I expect to pay to get this fixed in the uk? roughly

Great video. I have a 2015 Zafira C 2.0 CDTi and its showing the same fault, but on cylinder 3. I spoke to my local garage and they are saying I need glow plugs with an igniter. I've been quoted over £150 per plug! When I search, however it says they are the same as you have on the video, which are about £25 each. Does this sound right to you?

Great stuff as al

Great video Dave. Whats an acceptable resistance value for glow plugs in general?

Great video Dave, scope results sure proved number 1 busted , scarey when undoing them , saying to yourself please dont snap , top job , happy customer again , well done , how did you order your storm induction heater ?

Hi. How to remove what overhang obstructing glow plug change? On B20DTH Zafira C i cant even remove engine plastic top cover :)

Great video Dave 👍 is it always best to change all the glow plugs ? I had one go on my yeti 2.0 tdi I ask the mechanic he said you just need to change one ? I didn’t think that was right ?

Dave what is your view on these glow plug impact guns like the sealey SA141 that apply very low 10,20,30,40 NM to the plug socket. Run them for 3 min cycle and increase the NM. Assume they break the bond using vibration. Not used one but guess its another way.