Cold Starting

BlackLibertyCRD · **Posted:** Tue Sep 19, 2006 10:16 pm

richardkf wrote:

Also - in the summer, when the temps are like 98 degrees and one hundred and whatever under the hood ... over time ... will that cord begin to decompose with that constant hot exposure?

Sure, just like the rubber hoses, belts and other electrical wiring.

AndySRT · **Posted:** Tue Sep 19, 2006 10:17 pm

oldnavy wrote:

alpnst wrote:

So I went out and looked at the power cable hanging off the dipstick. First of all I feel dumb for missing it at the last oil change. I have always seen the power cable hanging out of the bumper or grill on other cars with an engine block heater. Leave it to Jeep to put it in a place were you have to open the hood to hook it up.

It is there because the guy that serviced it after it got to the lot did not route it out the front as he should have done. Incomplete prep.

looks like my dealer didnt prep it either. my cord is still attached to the oil dip stick tube. anyone know where it is spposed to be run?

oldnavy · **Posted:** Tue Sep 19, 2006 10:26 pm

AndySRT wrote:

oldnavy wrote:

alpnst wrote:

So I went out and looked at the power cable hanging off the dipstick. First of all I feel dumb for missing it at the last oil change. I have always seen the power cable hanging out of the bumper or grill on other cars with an engine block heater. Leave it to Jeep to put it in a place were you have to open the hood to hook it up.

It is there because the guy that serviced it after it got to the lot did not route it out the front as he should have done. Incomplete prep.

looks like my dealer didnt prep it either. my cord is still attached to the oil dip stick tube. anyone know where it is spposed to be run?

Just run it out the front throught the grill. If you need to tke the grill out it just pops out, no bolts or screws retaining the thing. Takes two minutes in and out.

richardkf · **Joined:** Wed Jun 14, 2006 4:15 pm **Posts:** 167

oldnavy wrote:

AndySRT wrote:

oldnavy wrote:

alpnst wrote:

So I went out and looked at the power cable hanging off the dipstick. First of all I feel dumb for missing it at the last oil change. I have always seen the power cable hanging out of the bumper or grill on other cars with an engine block heater. Leave it to Jeep to put it in a place were you have to open the hood to hook it up.

It is there because the guy that serviced it after it got to the lot did not route it out the front as he should have done. Incomplete prep.

looks like my dealer didnt prep it either. my cord is still attached to the oil dip stick tube. anyone know where it is spposed to be run?

Just run it out the front throught the grill. If you need to tke the grill out it just pops out, no bolts or screws retaining the thing. Takes two minutes in and out.

Im confused about this ... so mine is wrapped up too. What do I need to do with it? Just a matter of unwrapping the cord and routing the cord or does whatever the cord is attached to actually have to be removed and placed somewhere else under the hood and if so, what is it that I am placing and where?

Right now it is toward the rear just off center toward the drivers side and the cord is wrapped up in a plastic tie. My first Diesel =)

oldnavy · **Posted:** Wed Sep 20, 2006 8:37 am

Just undo the cord and route it forward through the grill. Don't let it confuse you or worry about doing anything wrong. It just requires you to undo the cord and route it forward through the grill, nothing else. Just remember to tie it off where needed to prevent rubbing and chaffing or some such thing. It is no different then routing an extension cord in your house.

Marlon_JBT · **Posted:** Fri Sep 29, 2006 2:19 am

43º tonight. Jeep hasn't been started in 2 days.

Glow Plug light was on for about a second, started up, felt and drove like it always does, yay!!!!

oldnavy · **Posted:** Fri Sep 29, 2006 10:41 am

Marlon_JBT wrote:

43º tonight. Jeep hasn't been started in 2 days.

Glow Plug light was on for about a second, started up, felt and drove like it always does, yay!!!!

I would hope so. My '83 MB N/A 2.4L diesel would start and run smoth as glass a 40*, it would rattle like hell at -10* after sittling out all night but only for about 30 seconds.

vtdog · **Joined:** Fri Sep 30, 2005 11:27 am **Posts:** 640

When it get to minus 43 and starts you get to cheer. 43 is not even worth a smile

BiodieselJeep.com · **Posted:** Fri Sep 29, 2006 11:18 am

Interesting to note that just recently we had some hard/long starts. I run 100% Biodiesel (commercial, not homebrew) and expected cold weather problems, but it is only about 45 over the cold nights. However, it COULD be a coincidental clogging of injectors due to the long use of biod. Also been seeing a lightning bolt (electronic Throttle control) light 2 random times now. Plus my wife drives the thing like, well, my wife. Hard to tell which could be doing it.

So first I ran a tank of diesel. The dieslel seemed to help a little. Now after a half-tank of diesel and injector cleaner, it seems better. Will go back to B100 and see if it is just the temp.

No scientific conclusions but advice:

1 Keep an eye on the temp with BioD use, it gets thick faster
2 That injector cleaner stuff may actually work
3 Keep your wife away from YOUR Jeep
Repeat step 3 as needed :lol:

dgeist · **Posted:** Wed Oct 25, 2006 9:41 am

BDJ (and anyone else): My home state (Georgia) has experienced a bit of a cold snap the past few days (high 30s in the AM, possibly right at freezing overnight). Yesterday, I had a little bit of a rough start, and today, the CRD seemed to have just enough juice to get me to the end of the street, then in konked out.

After waiting and re-starting it a few times, the system seems to pull enough fuel to run it for about 5 seconds, then stalls. Thankfully, I have another vehicle with a hitch and a friendly neighbor to help me tow it around the block back to the house.

It's running what the math would say is about B99 (yes, I know that's not wise in the middle of autumn :oops:

). Did I just experience my first Bio-jel? If so, will things get un-jelled when the temp goes up to 60 today like it's expected to?

Assuming it starts, I'm going out to top-off the tank with ULSD and drive it around for a while to try to mix things up. Assuming it doesn't start, where do I go from there? Would putting a little fresh B100 in there help (due to the solvent properties)?

Also, related to that, does the CRD fuel system work like a traditional EFI gasoline system in that there is constantly fuel coming from and returning to (and consequently doing some heat transfer and mixing) the fuel tank while running?

Hoping not to have to pump out chicken-fat sludge from my tank...

Dan

[quote="BiodieselJeep.com"]Interesting to note that just recently we had some hard/long starts. I run 100% Biodiesel (commercial, not homebrew) and expected cold weather problems, but it is only about 45 over the cold nights. However, it COULD be a coincidental clogging of injectors due to the long use of biod. Also been seeing a lightning bolt (electronic Throttle control) light 2 random times now. Plus my wife drives the thing like, well, my wife. Hard to tell which could be doing it.

So first I ran a tank of diesel. The dieslel seemed to help a little. Now after a half-tank of diesel and injector cleaner, it seems better. Will go back to B100 and see if it is just the temp.

oldnavy · **Posted:** Wed Oct 25, 2006 11:26 am

dgeist wrote:

BDJ (and anyone else): My home state (Georgia) has experienced a bit of a cold snap the past few days (high 30s in the AM, possibly right at freezing overnight). Yesterday, I had a little bit of a rough start, and today, the CRD seemed to have just enough juice to get me to the end of the street, then in konked out.

After waiting and re-starting it a few times, the system seems to pull enough fuel to run it for about 5 seconds, then stalls. Thankfully, I have another vehicle with a hitch and a friendly neighbor to help me tow it around the block back to the house.

It's running what the math would say is about B99 (yes, I know that's not wise in the middle of autumn :oops:

). Did I just experience my first Bio-jel? If so, will things get un-jelled when the temp goes up to 60 today like it's expected to?

Assuming it starts, I'm going out to top-off the tank with ULSD and drive it around for a while to try to mix things up. Assuming it doesn't start, where do I go from there? Would putting a little fresh B100 in there help (due to the solvent properties)?

Also, related to that, does the CRD fuel system work like a traditional EFI gasoline system in that there is constantly fuel coming from and returning to (and consequently doing some heat transfer and mixing) the fuel tank while running?

Hoping not to have to pump out chicken-fat sludge from my tank...

Dan

Dan sounds like you are having jell problems with the B99/B100 and need to drop back to about B20/B50 mix for the winter. All diesels run rough when first started compared to a gasser, but what you describe is fuel jelling syptoms. Remember B99/B100 has a jell point of about 40* depending on feedstock and at 32*F it will be real slushy and in some cases (used animal fat) it can be almost solid at 32*F, so cyut the mix back for the winter and you should be ok after you get it thinned out.

dgeist · **Posted:** Wed Oct 25, 2006 11:43 am

oldnavy wrote:

Dan sounds like you are having jell problems with the B99/B100 and need to drop back to about B20/B50 mix for the winter. All diesels run rough when first started compared to a gasser, but what you describe is fuel jelling syptoms. Remember B99/B100 has a jell point of about 40* depending on feedstock and at 32*F it will be real slushy and in some cases (used animal fat) it can be almost solid at 32*F, so cyut the mix back for the winter and you should be ok after you get it thinned out.

Yep, basically what I though (I just wasn't expecting the weather to get cold until at least a few tankfulls from now). My local fleet supplier just started offering B20/ULSD blend at the same price as B100, so I can pick a better poison for Winter.

The other question (does it un-jell when the temp goes up?) still stands. Anyone?

Dan

oldnavy · **Posted:** Wed Oct 25, 2006 12:20 pm

dgeist wrote:

oldnavy wrote:

Dan sounds like you are having jell problems with the B99/B100 and need to drop back to about B20/B50 mix for the winter. All diesels run rough when first started compared to a gasser, but what you describe is fuel jelling syptoms. Remember B99/B100 has a jell point of about 40* depending on feedstock and at 32*F it will be real slushy and in some cases (used animal fat) it can be almost solid at 32*F, so cyut the mix back for the winter and you should be ok after you get it thinned out.

Yep, basically what I though (I just wasn't expecting the weather to get cold until at least a few tankfulls from now). My local fleet supplier just started offering B20/ULSD blend at the same price as B100, so I can pick a better poison for Winter.

The other question (does it un-jell when the temp goes up?) still stands. Anyone?

Dan

It will un-jell once the temps warms up. If you can put it in a garage where it is 60* or better it will un-jell in a couple of hours or less, if it has not got to the solid stage. I would check to see what feed stock they are using, if animal fat it will jell at slightly higher temp. The B10 to B20 is an ideal mix and will do fine through winters much colder then you are likely to experience unless you head for Canada.

dgeist · **Posted:** Wed Oct 25, 2006 2:29 pm

oldnavy wrote:

It will un-jell once the temps warms up. If you can put it in a garage where it is 60* or better it will un-jell in a couple of hours or less, if it has not got to the solid stage. I would check to see what feed stock they are using, if animal fat it will jell at slightly higher temp. The B10 to B20 is an ideal mix and will do fine through winters much colder then you are likely to experience unless you head for Canada.

Good to hear. I'll be making it a B75 mix later today and a little more once I drive some of it out of the tank. It is based on chicken-production by-products, so I imagine that explains why I'm having problems in the 40s.

Thanks for the info.
Dan

Cold Starting

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