I had a very similar situation a while back, the remote start not working still happens on occasion to me but once I start with the key everything seems to work fine, and ended up replacing the glow plug module. Not sure where you are at but the -40 with wind chill the last few days here in Alberta haven't been kind to vehicles. Last year I installed an inline coolant heater, bought from NAPA for less than $100, and it really helps. The time between start and smooth idle has been drastically reduced

Just my two bits

 

2008CRD, thank you for sharing your experience with this. How would you compare the performance of the engine block heater to the coolant heater you installed yourself? I've only used it twice and personally, I'm not all that impressed with the performance of the engine block heater, I think I may have read somewhere that the engine bay isn't insulated properly to keep the block warm... or something?

Also, am I reading this correctly, a semi operational glow plug module was the cause of your remote starter not work? Did the module set off a CEL ? (I would have thought so?)

I will say this: I do get a prolonged glow plug symbol illuminated on my dash after turning on my Jeep but I thought that was simply part of the glow # 2 being non-operational.

Lastly, do you recall which coolant heater you purchased?

Separate but related issues. A check engine light will cause an error for the remote start. 10 second run time only.

Even with glow plugs being fairly new they can fail prematurely. These things happen. #2 is easy to change, so first I would make sure the connector is on tight and undamaged. If that looks good change that glow plug and see what happens.

You could also try swapping #2 glow plug with any other glow plug (making note of which plug you swapped it with) and seeing if the problem follows that glow plug, which would quickly confirm that plug is faulty

Brilliant Gray, thanks man!

I'll check the connector first. Is there a brand of glow plug that people are seeing the most success with in this application? I have quick access to Bosch brand glow plugs, hopefully they're a brand CRD owners are recommending...

Thanks again,

-h

 

Separate but related issues. A check engine light will cause an error for the remote start. 10 second run time only.

Even with glow plugs being fairly new they can fail prematurely. These things happen. #2 is easy to change, so first I would make sure the connector is on tight and undamaged. If that looks good change that glow plug and see what happens.

You could also try swapping #2 glow plug with any other glow plug (making note of which plug you swapped it with) and seeing if the problem follows that glow plug, which would quickly confirm that plug is faulty

 

What do you mean by not impressed by the block heater performance? It works well enough to start these Jeeps down to at least -41°C.

Bosch 4.4V glow plugs are a very good choice. Part number is 80047

 

Perfect, Bosch it is.

Gray, I don't live in an environment where it gets -40 in the winter, lol. I used it a couple times last winter when it was sub zero and... I don't know if it's just me but I simply didn't notice much after having it plugged in over night.

In - 40, I bet it shows it's value.

I guess 2008CRD uses both the engine block heater and the coolant heater in unison but... I also kinda assumed that he wouldn't need a coolant heater if the engine block heater is as capable as you say which obviously had me second guessing when coupled with what I've read and my own personal experiences.

-h

 

Perfect, Bosch it is.

Gray, I don't live in an environment where it gets -40 in the winter, lol. I used it a couple times last winter when it was sub zero and... I don't know if it's just me but I simply didn't notice much after having it plugged in over night.

In - 40, I bet it shows it's value.

I guess 2008CRD uses both the engine block heater and the coolant heater in unison but... I also kinda assumed that he wouldn't need a coolant heater if the engine block heater is as capable as you say which obviously had me second guessing when coupled with what I've read and my own personal experiences.

-h

I can tell around 45°F/-7°C if the block heater was running or not, big difference in how the engine sounds at start up.

I would assume 2008CRD is not using the two together. A coolant heater supersedes a block heater in effectiveness. Block heaters tend to be used because they are simple, cheap, and very reliable

 

Ha, I messed up the Fahrenheit conversion. -7°C is about 19°F. Anything above that and I can't tell if the block heater is plugged in. We were doing -37C, -53C with windchill all last week, jeep started without issue

 

Hey gang. Yeah I don't use both heaters, just the coolant heater. Back when I was having starting problems it was just simpler to get the coolant heater installed. At one point I was ready to rewire the glowplug relay, used to have an old Mercedes with the diesel and I bought a relay and hardwired the glow plugs so that in the really really cold day I could cycle the glow plugs longer. It worked AMAZING and did it to my cummins as well, but having to put a semi stealth button in the Jeep didn't bode well with me.

Might have to look at doing that later if the module goes again.

 

I have the P0672. Changed the glow plug. Old didnt look too bad. Didnt have a multimeter to check if its was bad or not. Deleted the code, but it was back soon. So must be bad wire or something... To be honest, I feel the non working plug only in when its like -10C

 

Yea, I'm definitely going to take a multi-meter to the bad glow plug when it's out before I install the new one. You never know!


Now where the hell did my 8mm deep well go? :|

 

Glow plug module more than likely will solve your problem.

 

Yeah I’m with Jim. If you haven’t changed your module that would be my next step

 

That module can affect only one plug out of 6?

 

Think of it as a relay that sends power to each glow plug individually. If one circuit, or in my case 2, doesn’t work the glow plug wouldn’t receive power.

It is why I was going to replace mine with a single relay feeding power to the glow plugs in series

 

I'm going to pull glow plug #2 today (I couldn't find my #8 deep well so I borrowed from a friend). We shall see what comes of it.

 

You can trace the wires from the module for quick testing as well.

 

Update

So I pulled the glow plug belonging to cylinder 2 and... it looked awful. So I didn't both testing it, I just replaced it.

A good half of it (the lower half) was coated in oil though: yikes! More importantly, wtf?

Also, the element was blackened and slightly course to the touch. Upon inspection, this was a Beru glow plug so obviously a quality brand.

Here, have a look:





After installation, it started normally which is great, much smoother than before.

What's going on here guys? What could have caused this?

I guess it may have proven useful to pull other glow plugs to see if this was an isolated incident but I simply didn't have time to. Perhaps in the coming days and depending on what you guys think?

Thanks again.

 

Update

So I pulled the glow plug belonging to cylinder 2 and... it looked awful. So I didn't both testing it, I just replaced it.

A good half of it (the lower half) was coated in oil though: yikes! More importantly, wtf?

Also, the element was blackened and slightly course to the touch. Upon inspection, this was a Beru glow plug so obviously a quality brand.

Here, have a look:





After installation, it started normally which is great, much smoother than before.

What's going on here guys? What could have caused this?

I guess it may have proven useful to pull other glow plugs to see if this was an isolated incident but I simply didn't have time to. Perhaps in the coming days and depending on what you guys think?

Thanks again.

I would only use Bosch glow plugs, I work on this engine all the time in Mercedes and sprinter vans and the Bosch one lasts longer.

 

Welp,

Based on what Mr.Google has to say, this seems (the oil on the glow plug) normal actually. So false alarm, still learning.