step by step glowplug FAQ

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Universally_Challenged

Universally_Challenged

Active Member
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axminster
ok, i've done a search and not really found all the answers.

1. TD4 becoming a pain to start. White somke and missing when reving. boot the f**k out of it and its fine. Glow Plugs?

2. the correct and easy way to check the plugs (never seen the light come on ever on the dash)

3. if failed change one or all?

4. Step by step on how to change them please. oh, make modle of the better ones.

cheers

UC
 
I agree it wont be your glow plugs, these only help with the starting, when its running they dont do anything.

Get your fuel pressure checked as already mentioned, when you boot it its drawing fuel at a higher rate than at lower speeds and runs fine.

It could also be a faulty injector which is causing a leak back of fuel at lower speeds.

Fuel pressure first then injectors.
 
tend ter agee wiff after eight. . . .but checkin out glow plugs is easy [to a rockit engineer] its a fast start system ,not the glow fer ten mins un fire,like sum tratters thet i wunt mention. . . .get a v meter and switch on ignition [when temp is below 5 deg] titter should git yer bout 12v at the buzz rail via neg [earth or return] so +lead on buzz rail ,neg lead on a good known earth or neg or return. . . .if you dunt get that then its heater power pack fault [check fuses ect] if its good then yer have to undo each link of buzz rail and wiff glow plug in place measure in ohms each resistance of each glow plug [should be approx the same ] if a faulty one is found ,they only come in sets ,snort. . .so change the friggin lot :) :) :)
 
ming said:
tend ter agee wiff after eight. . . .but checkin out glow plugs is easy [to a rockit engineer] its a fast start system ,not the glow fer ten mins un fire,like sum tratters thet i wunt mention. . . .get a v meter and switch on ignition [when temp is below 5 deg] titter should git yer bout 12v at the buzz rail via neg [earth or return] so +lead on buzz rail ,neg lead on a good known earth or neg or return. . . .if you dunt get that then its heater power pack fault [check fuses ect] if its good then yer have to undo each link of buzz rail and wiff glow plug in place measure in ohms each resistance of each glow plug [should be approx the same ] if a faulty one is found ,they only come in sets ,snort. . .so change the friggin lot :) :) :)
Click to expand...

So there is another way to test these ? I thought (did) it was enough to remove them and attach to a batterycharger, if the tip gets redhot it's ok ??:eek: :D :D :D (Never done with the Hippo but i used to do so with my daughter's old Opel Kadett 1.6D)
 
willo said:
So there is another way to test these ? I thought (did) it was enough to remove them and attach to a batterycharger, if the tip gets redhot it's ok ??:eek: :D :D :D (Never done with the Hippo but i used to do so with my daughter's old Opel Kadett 1.6D)
Click to expand...
good test willo. . . . .:)
 
the main problem is cold start. i hav never seen the glow plug light untill tonight. but then it was for less than a second, still didnt fire and keep going.

but turning the ignition on-off-on-off about 6 time ans it started straight up. now missing when driving of anything.

this only happens in cold weather.

allready had new rear pump, high preasure pump, all new injectors, new fuel sensors.
 
Universally_Challenged said:
the main problem is cold start. i hav never seen the glow plug light untill tonight. but then it was for less than a second, still didnt fire and keep going.

but turning the ignition on-off-on-off about 6 time ans it started straight up. now missing when driving of anything.

this only happens in cold weather.

allready had new rear pump, high preasure pump, all new injectors, new fuel sensors.
Click to expand...
YER GONNA HAVE TO CHECK THEM GLO PLUGS OUT NOW[do yer git white smoke on startin] a sign er faulty glow plugs,if you have say one plug u/s, in the summer you will get away wiff it ,but come the the bleak er winter might start strugglin, seems like wot you got. . . . . . . .get the volt meter out , its basic un dunt take long to check out. . .
 
easy way to test glowplugs if you have a meter that will read at least 10 amps,
1, disconnect the common rail that is connecting them all together.
2, connect the ammeter in series ,between battery positive and to each plug connection in turn and measure the current it takes.
3 ,compare the current that each plug takes, 8 amp would be good
 
forgot to mention , the relay that powers the glowplugs is temperature sensitive, ie they should stay on longer the lower the ambient temp,

sounds like you might have a duff relay
 
Universally_Challenged said:
the main problem is cold start. i hav never seen the glow plug light untill tonight. but then it was for less than a second, still didnt fire and keep going.

but turning the ignition on-off-on-off about 6 time ans it started straight up. now missing when driving of anything.

this only happens in cold weather.

allready had new rear pump, high preasure pump, all new injectors, new fuel sensors.
Click to expand...

Pse note that modern engines don't need a long time for the glow plugs to get the engine ready to start. A couple of seconds sometimes is enough, not half a minute or so as they used to need on older engines.
 
FORGET THE BLOODY GLOW PLUGS ! If it wont start its either not getting fuel or its low on compression.If it runs OK once it starts, chances are the compression is ok,so its a fuel issue - get it on Testbook and see whats going on.Someone who knows how to use it and go beyond its limits is what you need.
 
another point to consider, is the cranking speed, if its not getting turned over quick enough, compresion/ ignition suffers,
 
YEP i did. . . .just piontin out confusion. . . . .ignition ignight nearly same but different. . . . .get it ? titter :) :) :)
 
ignition
A process which initiates the combustion of the compressed air/fuel mixture in the combustion chamber. In a spark-ignition engine, the mixture is ignited by an electric spark; in a diesel engine, the self-igniting mixture must be preheated by glow plugs when a cold start is performed.
Glossary - F1Technical.net

i would still put money on the relay being duff, hope this helps
 
john t said:
ignition
A process which initiates the combustion of the compressed air/fuel mixture in the combustion chamber. In a spark-ignition engine, the mixture is ignited by an electric spark; in a diesel engine, the self-igniting mixture must be preheated by glow plugs when a cold start is performed.
Glossary - F1Technical.net

i would still put money on the relay being duff, hope this helps
Click to expand...
John T you are wrong - many direct injection diesels have no glow plugs at all - on a TD4 they are for extreme cold conditions.Most modern diesels also cycle them on and off to help with cold running emissions.
 
john t said:
i would still put money on the relay being duff, hope this helps
Click to expand...
yes well worth checkin this , fuel pump relay ,wiff ignition on ,oops [mint wiff glow plugs on ] all pumps [low pressure] should run fer bout 12sec then stop. . . .if you dunt get this the check ,fuses,fuel relay. . . . .:)
 
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