Engine/Transmission (1998.5 - 2002) Factory ECM has fast idle option in cold weather

[RATTLINRAM]

That's an easy one,,,,,,,,,,

Originally posted by dresslered

You mean to tell me that Dodge does not have one of their own trucks to "experiment" with????

Now why would they want to take a chance on screwing up one of their trucks that hasn't been sold yet?

 

[Mschevey]

Battery temp. sensor P/N

PKozlowski: Can you tell us the part number for the battery temperature sensor that they changed in your truck. Hopefully it is on the work order. I think I will try to change that on mine or get the dealer to under warrenty, depending on price.





DFormstone: As far as the feature needing to be activated, the high idle is active as soon as it is installed and the fault codes cleared in the ECM. The part of the feature that can be endabled/ disabled is the 3 cylinder idle.



Mike

 

[DFormstone]

Still doesn't work

Mschevey

Thanks I'll have to take it in to the experts to figure out. If I can figure out which one of them is the expert!

 

[David_VT]

electronics knowledge??

I've been too long away from resistors and thermocouples.



Who can pull out the correct resistance value for me so I can pull my battery temp sensor and test this circuit with a fixed resistor?



I plan to unplug the sensor, test it's resistance to the service manual and then replace it with a test resistor that should fake the system into thinking it is say -5F. Guess a second resistor value for say 20F would be a good idea also.



Anyone??



Now I wonder if a scanner would see the battery temp sensor or is it reporting only to the cummins ECM?



D

 

[Wheaties]

I was looking for something else and ran across the battery senser in the service manual. Look for it in the section that talks about the battery and the battery mount. I think it mentioned the resistance at various temps and the rate of change.



If you can't find it, email me and I'll look it up tonight.



Matt

 

[DFormstone]

How many work?

So people how many of you that have had the reflash for the fast idle actually have it working the way it should?

 

[stephen bolger]

Its been cold enough around here and it still will not work. but it work before the injector pump died.

 

[Amianthus]

Not me.

But then again, it hasn't been cold enough here to get it to work. It's supposed to be 60 again today. This is too wierd. Believe me, when I notice if this works, you guys will be the second to know (I'll be the first).

 

[David_VT]

Heat wave here also...

They say it will get real cold, but it's been into the mid 50's lately.



Great time to paint up the rust on my frame, finish my driving lights, finally install the practical solutions high idle kit, etc.



Now if I can figure out the resistor value for fooling out the battery temp sensor input, hopefully I can hear the ecm hi idle and 3cyl idle before it gets cold enough to need it... .



D

 

[Shelby Griggs]

As I posted above someplace, mine has worked once, but we haven't been having real cold weather either. It has been in the 30° range several times, but that may be too close to freezing to work, got to expect a little slop in tolerances on the sensors. Snowed here again last night, but not super cold, it is reported as 32° right now, so I doubt if it works again this AM. Besides, I just plugged in. According to the specs. , this should work, even after a plug in session, because I don't think the block heater will get the water temperature to 140°. The one time mine worked the temperature gauge was off of the 140° mark and still on high idle when I manually disengaged by tapping the brake pedal. I will let you guys know if it ever works again.



Shelby

 

[pcarlson]

18-014-01 vs 18-019-01

I live in Alaska and took my truck in for the fast idle upgrade. Could come in handy up here. However when I got home I noticed they upgraded to TSB 18-014-01 instead of 18-019-01. The 1801401 does not have the fast idle or 3 cylinder option listed on the TSB but the dealer said it did?? Good question as to if it does, I'll have to wait and see. 1801401 addresses auto's but 1801901 applies to all 24V's also 1801401 is for the Alaska weather and is labeled as a "Performance Enhancment For Severe Cold Weather Enviroments". Dealer said it advances timing to compensate for #1 Diesel but does not affect performance during warm weather operations with standard grade diesel #2. Definitly sounds different, no as loud at idle or driving. Seems to have a little more get up and shifts are a little less firm.



So anyone with this upgrade and no fast idle check to see which one was actually flashed to the computer. It might be 014 vs 019.

 

[DFormstone]

Good piont

pcarlson you bring up a good point regarding the TSB version. I have no idea what they reflashed my ECM to. Checked the work order in the hope they documented it but no luck.

The temperatures around here have been -15 to -20 Deg C so it's been plenty cold enough for that sucker to work.

 

[LMautone]

I just installed a high idler from Practical Solutions (under 30 min).

I know it works and i can control when , how long and how high i want it. forget the TSB.

 

[pcarlson]

Just some info. The TSB is installed and the dealer told me this morning that 18-014-01 and 18-019-01 were both installed in my truck as 019 needs 014 installed first. I don't know if thats correct but thats what he told me, but the 019 TSB does not mention having to load 014 first.



It was -10F this morning and the truck was plugged in for about 3 hours and there was no fast idle or 3 cylinder operation that occurred. Kind of disappointed and makes me think the posts earlier about the computer reading the intake temp after the manifold heater is true. Because it was definitely cold enough for both operations to occur today.

 

[Mschevey]

pcarlson: If it was plugged in for 3 hours the water temp was probably to high to let the feature work.



Still hasen't worked on my truck yet but yesterday the high was almost 70. Normal high 40. at night it only goes down to the high 30's to mid 40's

Mike.

 

[SnoKing]

Just got back from dealer in Everett. They flashed TSB18-019-01. No talk about 014. Covered under Warranty. "Customer states idles too low". We are going Snowmobiling next weekend, so should get to test it then. SNOKING

 

[pcarlson]

I had it sitting in the parking lot at work (about -4F) the day after the install. After about two minutes of idling the RPM's ramped up to 1200 and stayed there. I left after about 4 minutes of idle and it was still workin till I hit the brake. The 3 cylinder feature never kicked in. I think I will just get an idle controller as this program flash from Dodge has to many variables in it to make it useful.

 

[pcarlson]

I had it sitting in the parking lot at work (about -4F) the day after the install. After about two minutes of idling the RPM's ramped up to 1200 and stayed there. I left after about 4 minutes of idle and it was still workin till I hit the brake. The 3 cylinder feature never kicked in. I think I will just get an idle controller as this program flash from Dodge has to many variables in it to make it useful.

 

[THancock]

I'm a little confused about the parking brake thing. Nowhere did I ever read you had to have the parking brake on to have this feature work. Yet you all make reference to it. I don't see what the parking brake has to do with anything and the TSB never mentions it either.

Sounds like this thing is just a hit or miss fix, and that a PS idler is the way to go if you really want fast idle to work. DC just don't seem to be to bright or have much on the ball. I try to keep my rig away from the dealers at all cost. At this point I'd rather pay someone who is compitent than get halfassed work for free.

 

[BIG BOB]

I can't believe I missed this thread. I scanned it, trying to find an answer to my question and I could not find it. I may have missed it.



To everyone,



What are the benifits of the reflash over my exhaust brake? When I used my exhaust brake the EGT's go up to 500 degrees pre-turbo. If the exhaust brake does the job, Why should I get reflashed?



Looking forward to read your answers.