Question about 2001 Mercedes-Benz C-Class

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Car was remaped but now glow plug light dont come on

The engine wont spin round can it be an imobilzer or somthing that needs to be reset

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Hello,good day,no your immobilizer is out of the picture,try to check or replaced your starter relay(fuse box) located in engine room (standing in front) right side,small black relay,see your fuse and relay designation,ty

Posted on May 26, 2009

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Glow plug light stays on, engine turns over but won't start


glow plugs dont last for ever
have them visually inspected

they need to heat up to spec or motor wont start

what motor or vehicle ?

May 31, 2016 | Cars & Trucks

Tip

Diesel has trouble starting


hi, if you have any problems starting any type of diesel engine then this is a very good indication that one or more of the glow plugs need replacing, to get you home you can try turning the ignition on and then wait for the glow plug light to go off then instead of trying to start the engine turn it off then back on again, doing this usually gets it started just to get you home but this wont allways work.

Its best you replace glow plugs sooner rather than later as it could leave you stuck without a vehicle.

To change the glow plugs follow these quick instructions.
1. Look where the injectors go into the cylinder head then just under these you will see a smaller plug that will have a fixed wire this wire will be running from glow plug to glow plug this wire is held onto the glow plug by an 8m nut undo this nut on top of all the glow plugs, once undone you will notice that one of the glow plugs has two wires the other wire is the wire that carries the power to all the glow plugs so just remember witch glow plug this goes to.
2. now once you have removed the connecting power wire remember witch way it runs so as to get it back on the right way round it doesnt matter to much but might be a bit tight if you put it on the wrong way round.
3. Now how to undo and remove the glow plugs: To remove you will need a deep 10m socket place this over the top of the glow plug push down to ensure tight fit then undo this glow plug will then pull out (make sure their is no muck around the glow plug that can fall inside the cylinder so just check)
once you have it out its best you replace all the glow plugs as once one goes you will find that the others wont be to far behind.
4. Fitting new glow plugs. When your fitting the new glow plugs put them into their hole and gently screw in by hand to make sure you dont cross thread the thread as this can be a nightmare to put right. tighten the glow plugs in as much as you can by hand then nip them up using 10m socket and extension bar now dont over tighten them as this will damage the thread just tighten up till just after they stop then you should find they are ok.
Refit the wire loom on top of all the glow plugs remembering to fit the main power wire to the first plug make sure you tighten the nuts up properly on top holding the wire in place.
Once you have done this you are now ready to start your vehicle you should now find it starts with no problems.

If you still have problems starting you need to now start looking at things like the diesel filter or even the diesel pump, ill explain about these in my next post ok

on Dec 01, 2009 | Ford F-350 Cars & Trucks

1 Answer

Diesel glow plug light


TI SOUNDS LIKE YOU NEED A NEW GLOW PLUG

Apr 08, 2014 | 2001 Isuzu Trooper

1 Answer

Have a 2002 camry check engine light has been on for years. had the catalyst convertor replace 2years ago. still did not fix the problem. have been told that when it was put in that the system needed to...


if you have had a fault with the oxygen sensors for a long time it is possible it has fouled up the catalytic converter.

if the engine check light is the one for routine service and oil change and there is no other fault, it may be possible to reset it yourself.

1. turn ignition key to ACC or LOCK position

2. ensure the odometer is shown and not the trip meters

3. press and hold the trip meter reset button

4. while holding the reset button, turn the key to ON position

5. keep holding the reset button for at least 5 seconds. the odometer will read "000000"
and the light should go off.

if it does not go off then the system will need to be remapped, possible after a new catalytic converter.

try the reset sequence first though

Feb 23, 2011 | 2002 Toyota Camry

1 Answer

1997 Jetta: glow plugs not working. Glow plugs tested good, ne...


Before you invest in a long drawn out Glow Plug replacement etc. A little known issue occurs on the ALH TDI engines. The temperature sensor sending unit. A small blue module that plugs into the coolant hose assembly will cause a P error on the glow plugs that is nothing to do with the glow plugs at all. The part fails and sends a temp error to the engine computer. I tested all the coolant glow plugs, engine glow plugs and glow plug harness and all worked fine. One of the test procedures for the glow plugs is to undo this sensor that will force the glow plugs to come on no matter what temperature. This confirmed my GP system was functional and the sensor was bad. I purchased the part from local VW dealer for $33 US and installed and it is fine. Dependent on your model it can be square or round. The link to this part for your car is http://www.partsgeek.com/catalog/1997/volkswagen/jetta/body_electrical/water_temperature_sender.html

Be sure to have VW Pentosin coolant on hand to refill coolant system as you will lose quite a bit when removing this part. It is located slightly behind the coolant glow plug assembly.. This is the round ones not the ones on the engine block at top.

Be sure that when you replace it you put in a new rubber gasket seal.. its a round rubber seal that should come with your new part. Dont reuse the old one or you will have a leak.

There is a c-clip that holds this in the hole you slide that clip off and wiggle the sensor out. Coolant will run out of the hole, so do this outside. The sensor is easily pulled out. You will need to insert the new part in teh same hole with new rubber gasket and replace c clip. Then plug in wiring harness and you should be good to go.

May 17, 2010 | 1997 Volkswagen Jetta

1 Answer

Car wont start diesel engine Could it be the 'glow plug'? what is a glow plug? how can i test?


A glow plug is a small heating element in the cylinder. It heats the diesel so that starting can be made easy. Is your car standing in the open frozen parking If yes, then it would require a lot of battery power to first heat all the cylinders and then turn the engine to start. What we do in such conditions is to light up some fire under the car and heat the fuel system enough for the diesel to warm up a little and thus save the battery for glow plugs. Generally, all vehicles have an indicator light which comes on when the glow plugs are ready for starting. The diesel will ignite on compression, but it has to reach the cylinder and thus has to be flowing. In cold it freezes and hence the need for glow plugs and the heat. If it is parked in heated parking then the need for glow plugs decreases.

Jan 01, 2010 | 1991 Peugeot 405

1 Answer

Wont start but cranks


I dont know if you have tried this, but first change the glow plugs, if that doesnt work or you have tried that, then clean off the terminal where the glow plug cables attach to by the battery. Hope this helps

Mar 17, 2009 | 1985 Ford F 250

1 Answer

VW Sharan 1997


Depending where you live if the temp. is over 45 degrees F the glow plugs shouldn't be needed for the engine to start. Have you ever had the check engine light come on? Your problem is probably not in the glow plugs.

Mar 13, 2009 | 2003 Volkswagen Jetta TDI

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