where are my spark plugs?
#2
04-06-2006, 09:42 PM
RE: where are my spark plugs?
They should be covered under a long black plastic strip on your left side, take that strip off and they should be there.
#4
04-07-2006, 06:56 AM
RE: where are my spark plugs?
very good question.
on the middle of course. you need to remove that intake pipe.
then remove the covering on the middle.
on the middle of course. you need to remove that intake pipe.
then remove the covering on the middle.
#7
04-10-2006, 05:29 AM
RE: where are my spark plugs?
yes.
remove the #17.
[IMG]local://upfiles/1/230E16315510496F903FF741DFD28F13.jpg[/IMG]
remove the #17.
[IMG]local://upfiles/1/230E16315510496F903FF741DFD28F13.jpg[/IMG]
#10
04-11-2006, 08:11 AM
RE: where are my spark plugs?
Mgm_300e
If I am right, your car is fitted with an M104.942 engine. This has a HFM fuel injection/ignition control system.
Part of the electrical ignition control cables (engine cable harness) run under the “valve cover” (item #17), above the spark plugs. It gets very hot in there. With time the cable insulation gets hard, particularly if the engine has been overheated.
Now, when the cables are disturbed, say during a spark plug change, the insulation can crack, resulting in short circuits. This will cause engine misfiring and could damage your ECU.
You may be lucky and your engine cable harness may have already been renewed. They usually last about 10 years on W124s.
To check the situation, after removing cover #17, carefully check if the black moulded cables are very hard, brittle or cracked. If the rubber insulation feel soft, then it is likely to be a new cable.
If it is still the original cable harness and if you are very careful when lifting it out, to get to your plugs, you may be OK. However if you intend to keep the car, I would get the cable harness/ignition leads changed, before they cause expensive problems, like blowing up the ECU.
Sleepwalker is an expert on these matters.
Don’t forget to put a smear of copper based grease on your new plug threads when changing them.
Best of luck,
Allan l
If I am right, your car is fitted with an M104.942 engine. This has a HFM fuel injection/ignition control system.
Part of the electrical ignition control cables (engine cable harness) run under the “valve cover” (item #17), above the spark plugs. It gets very hot in there. With time the cable insulation gets hard, particularly if the engine has been overheated.
Now, when the cables are disturbed, say during a spark plug change, the insulation can crack, resulting in short circuits. This will cause engine misfiring and could damage your ECU.
You may be lucky and your engine cable harness may have already been renewed. They usually last about 10 years on W124s.
To check the situation, after removing cover #17, carefully check if the black moulded cables are very hard, brittle or cracked. If the rubber insulation feel soft, then it is likely to be a new cable.
If it is still the original cable harness and if you are very careful when lifting it out, to get to your plugs, you may be OK. However if you intend to keep the car, I would get the cable harness/ignition leads changed, before they cause expensive problems, like blowing up the ECU.
Sleepwalker is an expert on these matters.
Don’t forget to put a smear of copper based grease on your new plug threads when changing them.
Best of luck,
Allan l