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+--- Thread: W114 with hard start and no glow plugs (/showthread.php?tid=5390)
W114 with hard start and no glow plugs - TurboTim - 03-03-2014
Just picked this thing up. I thought the motor was going to be shot but its not. It will start with the smallest shot of ether but wont idle and has low power but it does run smooth when running just tops out at 60mph. Also glow plug light not coming on. How does that system work? Any idea where to start looking?
RE: W114 with hard start and no glow plugs - lgreeley83 - 03-03-2014
Probably has the loop style glow plugs in it. Those are wired in series so if one closest to driver burns out all after are dead. Those hard metal things between each plug provide resistance. Do not put 12 volts to an individual plug.
Also my light was out but plugs still worked. Those metal things between plugs should get red hot after about 30 seconds. Easier to see at night. I converted mine to the manual push button with solenoid, don't know location of original fuse and relay. My guess inner drivers fender. You should her it click.
As far as no idle....fuel filters, air in lines? Does it idle at all when warm? Do you have an idle adjuster knob?
RE: W114 with hard start and no glow plugs - sassparilla_kid - 03-03-2014
Try a valve adjustment?
RE: W114 with hard start and no glow plugs - larsalan - 03-04-2014
I have had that light funk out when 1 plug goes bad. Then the light may come and go. And when 2 plugs go bad or 3 then you are well fucked.
As for not pulling 12v on a single plug I think that is wrong. To test any plug for at the very least continuity disconnect it from the wires then strike a jumper wire from the tip of it to the positive battery. Sparks flying means there is continuity. No spark and you need to replace those ones.
Also it is a huge 80w fuse on the driver side under the hood. Under a plastic cover attached to glow plug wires. I had never seen one burned personally.
RE: W114 with hard start and no glow plugs - sassparilla_kid - 03-04-2014
The old style plugs are different yo
RE: W114 with hard start and no glow plugs - larsalan - 03-04-2014
ah, ic
RE: W114 with hard start and no glow plugs - Tito - 03-05-2014
sticky rack where my starting problems... also it would not idle, started after 30 sec cranking, and had a extremely bad throttle response
RE: W114 with hard start and no glow plugs - sassparilla_kid - 03-05-2014
I say adjust valves, get the upgraded plugs, report back