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How to test glow plugs on diesel engines
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- Опубликовано: 14 авг 2024
- In this video we show you how to test glow plugs in a diesel engine. This is a quick simple trick that will tell you if your glow plugs are faulty. This is how we check glow plugs in professional workshop. This can be done easily without removing the glow plugs or even hooking up a multimeter.
Great video. 👍
In cold weather my Peugeot diesel starts, sounds and behaves exactly the same as your Ford did before you replaced the glow plugs. Thanks for uploading this, I'm going to give it a go.👍
Great video, is smoke from the exhaust ALWAYS a sign of bad glow plugs (Motor in good condition so it is not rings etc) Trying to differentiate from glow plugs or battery in cold weather.
Another common cause of smoke on start up would be a blown head gasket or cracked head. A failing battery would cause it to turn over slowly, but unlikely to cause smoke from the exhaust.
Great video mate .
Iv got a 2003 vauxhall astra 1.7 turbo diesel and even when its pretty cold out the coil glow plug light only stays lit for 2 seconds max ..my wifes astra J which is a bit newer stays lit for a good 6 seconds in the same scenaro .So something is wrong somewhere ..any ideas what to check tia .from the UK 🇬🇧
Ps once the car starts its fine no bad idle or lack of power etc ,it just struggles to start and sometimes drains the battery so im guessing the plugs are not heating up nowhere near as hot as they need to be for whatever reason .
Mate this is happening to me every year. I have to replace the glow plugs way to often and usually only have 1 plug left working.
Any idea what's going on? I'm sure the plugs should last longer then 1 year.
First two things to look at. Are you fitting genuine glow plugs? I know we've had some aftermarket plugs that have short life spans, generally made in China. Also make sure everyone using the vehicle knows how to use the glow plugs properly for the full amount of time the light is on. If they aren't used properly they can get damaged on start up.
Yea usinging boch plugs from supercheap or Part Master, have used a different brand aswell incase it was that reason. I'm the only one driving it so im starting it correctly.
The head got replaced in 2018 by a mechanic and the glow plug issue started after that. It's a 2006 2.5lt courier.
The plugs look really black and sooty though. Seen this before?
@@kyle2956 haven't come across issues after head replacement. Can't think what would cause that, unless maybe it has leaking injectors? I prefer to fit NGK to couriers as that's what Ford use, and the do have a lot of issues. Next time I'd try getting a set from a Ford dealer and see how they go. Also check that the light isn't going out too early. Can you hear the relay click off when the light goes out?
@@gettingitdone1 My ‘99 Ford E450 was having starter trouble where sometimes there was no cranking on its old ignition wire so we ran a separate line directly to the ignition system and installed a momentary button in parallel and it started right up… but now that I read this could our “hot wire” solution be causing damage to the glow plugs because it bypasses the computer and any protective temperature sensors? Because this week my “engine died” (!) at 220,000 miles some of the indicators for bad plugs along with less and less power until now it just barely creeps at 1 mph. My mechanic wants to replace the engine but I’m wondering if we’re abusing the glow plugs into a bad state. Any thoughts?
Excellent video
How about using the continuity on your meter to test the plug ,instead of a live wire
This is the fast way to do it. We're also not testing for continuity, we're testing for current draw. If you were to do that with multimeter, you would connect in series into the circuit for each glow plug. This is a quick test we use in the workshop to prove glow plugs are dead. If this didn't give us the results we were expecting, we would then go into more in depth testing (as explained in the video).
My glow plug light stop coming on in my 01 c7500 GMC truck what causes that anybody know
Check the fuses, is a simple start. Do the glow plugs still operate?
Aren't some glow plugs rated for 5volts? Wouldn't direct battery power then harm them?
There might be some rare ones rated that low, but this technique is still perfectly fine. It's a very brief touch and the high current draw of the plug will easily absorb the spike.
Hi what symptoms can glow plugs cause
On cold starts the motor will start rough, misfiring and blowing smoke out the exhaust
@@gettingitdone1 ok thanks I'm getting them symptoms misfire rough start but no black smoke and po674 code thanks
Do you have the ignition switched on.?
No, you're testing the current draw of the glow plugs themselves, disconnected from the rest of the system. If you turn the ignition on the rail or the wire disconnected from it will become live and may arc on an earth and blow a fuse.
practice
Not quite sure what you mean there?
Bye bye ecu if you accidentally touch off anything else
Even if you did accidentally catch an earth somewhere, the chances of damaging an ECU like that would be extremely minimal. Maybe if you were dumb enough to hold it to the earth for a long time, even then you'd probably burn your hand first.
Where are your spark plugs located.
No spark plugs in diesel motor. Only glow plugs which do a completely different job. Are you looking for spark plugs in a petrol or diesel vehicle?
That's a dangerous way of testing !
It's really not. Not sure what you think would be dangerous about it.
Touching the body ground with hot wire :D
“ Tist “ ?????
I can never tell if these comments are pointing to something misspelled in the closed captions, or just a dig at my accent. But that's a lot of question marks. Is there an actual question here?