did ya'll forget about the old 6.9 sytle glow plug controller, the one WAY in the back that screws into the water jacket in the back of the block, this is why the 2 holes behind the air cleaner base seems to be vacant. i figured the best thing to do was leave that old style one there and put the new kind on it. they are really expensive, i guess the poor boy could get a regular starter solenoid and run 8 wires off of it. i used the horn button to actuate the glow plugs on my truck!! till i got the glowplug controller fixed and it only half-*** works now. before i changed my glowplugs, i just used a little snort of starting fluid just a little, no longer than 3/4 of a second. if this works every time, it is your glowlugs, if this does not seem to work at all, it is a fuel problem. look for any tiny leaks you may have. the smallest little tiny leak is just as bad as a big one. but you say the block heater hels, so i would try just a snort of starter fluid. too much will usually blow a head gasket, but not abused, works perfectly. you dont even need glowplugs and it fires up before the motor turns over good. if you get it right you'll know it, also if you get too much, you'll know it.

 

Dieseldan I have a hard starting 93 7.3 non-turbo it also has more white smoke then what im used to. It does not smoke the same all day but after warm up i do notice some. most during cold start. I am going to test glow plugs but I was thinking what a new injector pump is going to cost if needed. Any ideas would help Thanks donjette.

 

are there threads with a little more discussion/info on this? seems a good way to go for all of us w/ pushbutton glowplugs.

 

if the gp relay does that mean its no good?mines hard starting the first start of the day ,i have to cycle the gps 2 or 3 times then it starts easy

 

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if the gp relay clicks after the light shuts off

 

If the light goes off really quick it means you have glowplugs that aren't working, if it isn't clicking then either the solenoid is bad or the controller is. I doubt there is a discussion on this, the only reason I know about it is because the Local Mavistar dealer told us about it when we were looking for a new controller.

 

So if the truck is hard starting and the relay keeps clicking numerous times it means the relay/controller is bad? Also on my drivers side glow plugs at the harness I'm only geting 1.6 volts on the end plug wire. Is this an indicator that the relay/controller is bad? I'm getting 6 volts on the passenger side.

 

Start checking wiring for bad connections and bad fusible links, the controller should click a few times after the ligh goes out, if its not then there is a problem. Start with the 2 big yellow or orange wires (battery power) then move on to the 2 brown ones that go to the glow plugs, check all the connections on the solenoid (controller) for corrosion etc. It seems like the controller is fine, its a wiring problem.

 

2 bad GP's Starts like a champ. Thanks Guys.