How do I test glow plugs on my van
2007-02-09 04:28:51 · 9 answers · asked by bumble 3 in Cars & Transportation ➔ Maintenance & Repairs
Remove thge glow plugs. Connect each ones outer to the engine block and reconnect the supply wires. Switch on the ignition. The tip of each glow plug should start to glow red within 5 seconds. If any of them don't then the ones that don't are knackered. If any of the plugs glow in the middle instead of at the tip then the ones that glow in the middle are knackered.
2007-02-09 05:21:10 · answer #1 · answered by ? 3 · 0⤊ 0⤋
What brand of van ? I imagine it is diesel, maybe VW ? have someone start to start the car as normal, heating the plugs until the light goes off. check each plug then and see if each is warm. If you can feel 3 warm ones ane 1 cold, the cold one needs to be replaced. Or remove the buss bar and check each plug . All you will need to check one will be a test light. Place one wire for the test light on the positive post on the battery and the other wire on the glow plug in question. If the light comes on, the plug is good. if the light doesn't light, the glow plug is bad. If you have any questions check out vwdieselparts.com .
2007-02-09 04:43:12 · answer #2 · answered by david d 5 · 0⤊ 0⤋
get a multimeter on ohms (any cheap one will do) then disconnect the wire to each glow plug and test from the wire connection to the engine block as heater plugs go open circuit when blown you would see no change(or very little ) on the meter but if it shows an ohm reading it should be ok even one going will tend to make starting hard and from experiance when one goes the others seem to go soon after so I would replace them as a set also with the meter on dc volts check the supply on the wire connect the meter and have someone turn on the ignition you should see around 12 v or 13v for a short time then it will switch off if not the timer relay or fuse is at fault but still check the plugs as they may have caused the fuse or relay to fail
2007-02-09 20:59:56 · answer #3 · answered by techno 3 · 0⤊ 0⤋
when a diesel engine runs it compresses the air so much it gets very hot and then the diesel is injected at just the right time so it will ignite and burn making power when the weather is cold the glow plug helps this process till the engine is running and has more heat in it so the incoming air is hot er sooner compression alone cant all ways heat the air up to high enough temperatures when the block pistons and heads are cold
2016-05-24 01:35:42 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Sorry, I don't know! But I think a good Diesel Mechanic can do it for you! I don't think they cost all that much, do they? But if you're having trouble starting, yet it runs fine, that could well be the glitch.
Why didn't you ask me about 27-year -old deisel pumps, I really got the course on that one! Ha! Took me three days, sweating ,in July to get the thing out and in again , but-hey- I'm no mechanic!
2007-02-09 04:45:55 · answer #5 · answered by Sionarra 4 · 0⤊ 0⤋
Make sure power to them is off. Disconnect them one at a time and test them with an ohmmeter to the engine block. The resistance should be VERY low. If no resistance,it's shot! Hope this helps.;-)=
2007-02-09 04:38:03 · answer #6 · answered by Jcontrols 6 · 0⤊ 0⤋
You should be able to just turn on your van- not start the engine- but turn it on, let the plugs heat up, then feel them. If they're warm they're working. If cold they're not.
Good Luck
2007-02-09 04:36:38 · answer #7 · answered by Anonymous · 0⤊ 1⤋
Disconnect power to each one and use an ohm meter. You will have to look up the correct value.
2007-02-09 04:37:22 · answer #8 · answered by Lab 7 · 0⤊ 0⤋
GET SOMEONE TO TURN THE CAR OVER. YOU GO TO THE BACK AND SEE IF SMOKE IS COMING FROM EX PIPE
2007-02-09 04:47:00 · answer #9 · answered by Anonymous · 0⤊ 0⤋