Quote:
Originally Posted by tjts1
Why the hell not?
It sounds like most people on here have no clue what the resistor does. It is completely irrelevant if the resistor is in the plug or wires or both. Just make sure at least 1 of the components has one.
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M.B. spent vast amounts of development dollars on their engines. I'm sure they know what they are doing with the specified components.
Not only do the leads have a 1Kohm resistance in the plug ends, the distributor cap also has resistance built in.
The original idea for have resistance in the leads was for suppression of interference for the vehicle electronic components - the ECU, OVP, FPR and even the radio. The EZL is a very delicate component that can be damaged just by losing the thermal paste holding it down to the fender.
M103 engines are getting over twenty years old. We see all sorts of posts in threads complaining about idling problems and performance problems for M103 engines. The plugs are part of the problems here.
M.B. have stated that resistor type plugs can be used (times have marched on - they have also specified plastic oil can be used, it was never available back in the days when the engine was designed).
Do not put wire only non resistive leads on the engine. If you can't source non resistor type NGK's just put resistor type in - leave the leads alone. Only use OEM or Beru leads, distributor cap and rotor.
Note that platinum, multi posted plugs and other exotic plugs have been known to cause idling problems in M103 engines (over time). Ordinary $1.50 NGK non resistance plugs should last a very long time. Putting $15.00 plugs into an engine that doesn't require it is a waste of money especially when they start playing up after a relatively short life.
Everyone knows that computers are fickle machines that require nice environments to keep optimal operation going. Laptops only lasts a few years because of the wear and tear and knocks they get. Normal computers are subject to the vagaries of power flucuatuions and spikes - that's why we have power filters, surge suppressors and U.P.S's.
Modern cars are computer controlled gadgets. Vehicle E.C.U.'s are subject to all sorts of weather conditions and to the vagaries of alternators, regulators and uneven power supply. There are many filters and associated electronic circuitry the manufacturers install in the vehicles to protect the E.C.U.s and other electronic control equipment.