|
|
|
#1
|
|||
|
|||
I'm bewildered
Yes I finally got all the fluids in and took care of some other last minute issues on this engine install I'm doing on 85 300 sd and I finally got to start it and I crank and crank and crank and can't get it to even sputter. Took notice real quick my glow plug light is not working. I checked all the plugs before install and they all worked. Checked them again with a 12 volt test light and they all had juice except the 5th one so I thought guess the 5th one went bad and was going to replace that one. I checked the wire feeding it for continuity and it was good along with all the 4 other wires. As I was trouble shooting at the glow plug relay box for power when I had the connector feeding the 5 glow plugs I noticed my light started working in the dash I thought well its working now put the connector back on feeding the glow plugs and then no light in the dash and no juice at any of the plugs. I go back to the box and wiggle the plug that has 4 wires on it I hear a click and now I got juice again and a light in the dash, as soon as I plug the 5 wire plug in feeding gp's everthing dead again. The only thing I think that may be happening is that when I put the engine in those wires in that harness got pinched really bad between a.c. and frame of car. I'm thinking I have to rip the g.p. harness out and see whats going on unless someone can enlighten me as to what is happening? Sure hope I can get this running tomorrow as it has been down over a month now.
|
#2
|
|||
|
|||
What car is this ?
__________________
1980 240d , chain elongation, cam marks reference: http://www.peachparts.com/shopforum/showthread.php?threadid=10414 http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html evap fin cleaning: http://www.peachparts.com/shopforum/showthread.php?t=156207&highlight=evaporator A/C thread http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html |
#3
|
|||
|
|||
I posted its an 85 300sd 617 motor. I had all the wires unhooked even at the junction box but Im pretty sure I got them all back in the right spot. Car turns over good. Everytime I plug the glow plug harness in there is no juice to plugs I have to wiggle the plug that has the 4 wires in it I thinkit goes to the junction box on passenger side fenderwell I hear a click and I have power coming off the 5 prongs out of g.p. box but the minute I plug the g.p.'s in no power to the plugs kind of like something trips then when I wiggle the 4 wire small plug seems like it resets.
|
#4
|
|||
|
|||
You should measure 12 V at #5 glow-plug (terminal screw to gnd) whether the glow plug is good or not. If not, the wire to it or the glow plug relay is bad.
Both my 300D have started becoming erratic on lighting the dash lamp. I checked that all glow plugs are good (need 3 working to light). Even when not lit, the relay is usually on (measure 12 V and hear it click off after 20 sec). I swapped w/ a spare relay and no difference. Often, if I leave the switch in "run" for 5 sec & try again, the lamp lights. Haven't dug into the lamp feedback circuit yet. It does depend on a coolant temp sensor reading.
__________________
1984 & 1985 CA 300D's 1964 & 65 Mopar's - Valiant, Dart, Newport 1996 & 2002 Chrysler minivans |
#5
|
|||
|
|||
Just checked this morning again I have 12.5 volts at the relay coming in and going out but as soon as I plug the harness in to carry voltage to glow plugs I have nothing at the plugs yesterday I had voltage to first 4 g.p.'s. Do you think problem is in relay or the wireing it did get pinched as I was putting engine in but I see no outside damage.
|
#6
|
|||
|
|||
Unplug the glow plug wiring harness and the the glow plug relay. Check what ohms you get from each of the conductors from the plug with one test lead and the other test lead connected to engine ground and get back. You should have 5 reading one for each glow plug.
__________________
92 e300d2.5t 01 e320 05 cdi 85 chev c10 |
#7
|
|||
|
|||
Are you saying to unplug wires going to glow plugs and also the plug with the 4 wires on it that I think goes to te juntion box then take an ohms reading on the 5 prongs that feed the gp's?
|
#8
|
|||
|
|||
Connector between glow plug relay and glow plugs.
__________________
92 e300d2.5t 01 e320 05 cdi 85 chev c10 |
#9
|
|||
|
|||
I just checked the ohms on each wire feeding glow plugs I got a reading of .2 ohms telling me there is no problems or breaks in the wires. Is there a way to check relay?
|
#10
|
|||
|
|||
From your description, it sounds like you have an intermittent electrical connection.
If you haven't done so already, unplug all the connections on the glowplug relay and treat with electrical contact cleaner. Disconnect the battery beforehand. Also remove and inspect the strip fuse. They are known to develop hairline cracks that can cause your problem. If the relay consistently engages after the above treatments and the car still fails to start...you may have lost prime and have air in the injector lines.
__________________
78 W116 300SD 'Desert Rose' new as of 01/26/2014 79 W116 300SD 'Stormcloud' RIP 04/11/2022 |
#11
|
||||
|
||||
Does this relay have a fuse or a breaker? You've done everything I'd do before throwing a new relay at it.
Sixto 83 300SD |
#12
|
||||
|
||||
Quote:
I don't know if the colors of the wires re the same on the 4 socket connector. 1) rd/bk (Black) ignition switch (Voltage goes thorugh this to turn on the Glow Plug Relay, if you cut the Wire and wired a push button Switch to it and your GP realy is still good you could use the button Switch to turn the Glow Plugs on and retain the feature that tuns the Glow Plugs on while the Engine is cranking bay way of the Purple Wire on a W123. I also believe the Glow Plug Light would still work if you do this.) 2) vi (Violet/Purple) On turbo models goes to a Wire Terminal/Junction block and mates with a White Wire coming up from the Starter Solenoid. When you Crank the Starter + Voltages goes through the White Wire to the Violet one and turns the Glow Plug Relay On. (You could disconnect this wire at the Terminal Block or the small Terminal at the Starter Solenoid and wire it to a push button Switch.) 3) blu/wt (Blue with white strip)glow indicator Light 4) br (Brown)ground
__________________
84 300D, 82 Volvo 244Gl Diesel |
#13
|
||||
|
||||
Quote:
__________________
84 300D, 82 Volvo 244Gl Diesel |
#14
|
||||
|
||||
Did you loosen some hard lines at the Injectors to see if you are getting fuel up to them?
__________________
84 300D, 82 Volvo 244Gl Diesel |
#15
|
||||
|
||||
Interesting, yet another sudden case of a no-start...
This may or may not help, but I suddenly lost all glow awhile back and traced it to a bad ground. I decided to run its own short ground directly to a bolt nearby and it's been fine ever since. I agree that it's an intermittent wiring problem as far as the plugs go. Quote:
-Rog |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|