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bwest
Administrator
United States
3820 Posts |
 Posted - 02/02/2018 : 07:35:54 AM
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| Is anyone else having trouble with the delta sensor going out all the time on these? I am thinking of relocating it. I'm thinking it is getting too hot. Anyone ever done that? |
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bwest
Administrator
United States
3820 Posts |
Posted - 02/02/2018 : 10:39:20 AM
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| OK, I'm going to go ahead and try to relocate this. I'll keep you all posted on my results. |
Bryan |
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RonF
Top Member
867 Posts |
Posted - 02/02/2018 : 10:50:19 AM
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| I don't know what the Delta sensor is you're referring to. |
US Army retired CMBT |
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exmod110
Senior Member
151 Posts |
Posted - 02/02/2018 : 11:29:48 AM
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| ours would get wet and go goofy, we have attached them to the underside of the body by flipping the bracket on the sensor and extending the hoses. very few problem after that. IH had made a shield for them on the newer units that could be a retrofit but we just relocated them. |
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slippert
Top Member
USA
630 Posts |
Posted - 02/02/2018 : 11:43:32 AM
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| Wet weather seems to be the common factor here, I get a rash of bad ones when it gets rainy or thawing in spring time when water is everywhere.... IH has shields(2612020C1) you can buy for them... they do seem to help... but have found a higher location and make my own cover works best.. |
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slippert
Top Member
USA
630 Posts |
Posted - 02/02/2018 : 11:46:53 AM
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AKA Pressure differential sensor on top of the DPFquote:
Originally posted by RonF
I don't know what the Delta sensor is you're referring to.
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Mechan1c
Top Member
USA
853 Posts |
Posted - 02/02/2018 : 3:21:38 PM
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| I have 26 of the '09's and have never changed one to answer the original question. My ambient climate is really mild here in the PNW... |
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Mechan1c
Top Member
USA
853 Posts |
Posted - 02/02/2018 : 3:35:04 PM
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| It is wet though! Rain expected every day for the next week. About 8" of rain in January but fairly warm. 5" in the last 2 weeks. |
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bwest
Administrator
United States
3820 Posts |
Posted - 02/05/2018 : 05:23:19 AM
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quote:
Originally posted by Mechan1c
It is wet though! Rain expected every day for the next week. About 8" of rain in January but fairly warm. 5" in the last 2 weeks.
Yuck! All due respect you ya, I'm glad I don't live there. Here in the mid-west we depend on the rain. But I don't really like it to be raining in my business. Just makes a mess.
"Delta" is what the parts department calls it. I've heard both. Didn't even know the word "delta" until after I called them "differential pressure". Then the parts guy says "what's that?" LOL, you gotta love these companies! When I worked for Ford they did the same thing. You'd think the designing engineer would give a part its name and then everyone would call it that. lol
I'm curious as to how the shield looks. Anyone have pictures? |
Bryan |
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bwest
Administrator
United States
3820 Posts |
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bwest
Administrator
United States
3820 Posts |
Posted - 03/28/2018 : 06:39:31 AM
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| Well, that didn't last long. Driver called in on the radio yesterday saying the check engine light is on and I have lots of blue smoke. OK, checked the codes and found "exhaust gas differential pressure (EGDP) signal out of range low (flash code 1729)" SPN3251 FMI4. Replaced differential pressure switch (Delta) and all was well until about 30 minutes into a wet route yesterday. Driver calls in with same complaint. Got it in this morning and have the same code. Pulled connector off and checked pins and for water, no problems. Cleared codes and it came right back within seconds. |
Bryan |
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RonF
Top Member
867 Posts |
Posted - 03/28/2018 : 08:36:04 AM
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quote:
Originally posted by bwest
Well, that didn't last long. Driver called in on the radio yesterday saying the check engine light is on and I have lots of blue smoke. OK, checked the codes and found "exhaust gas differential pressure (EGDP) signal out of range low (flash code 1729)" SPN3251 FMI4. Replaced differential pressure switch (Delta) and all was well until about 30 minutes into a wet route yesterday. Driver calls in with same complaint. Got it in this morning and have the same code. Pulled connector off and checked pins and for water, no problems. Cleared codes and it came right back within seconds.
Pull on your wires at the connector. I have had a few broken inside the covering.
Also make sure your tubes to the DELTA sensor and not plugged. |
US Army retired CMBT |
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bwest
Administrator
United States
3820 Posts |
Posted - 03/28/2018 : 08:48:55 AM
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| OK, I've got a harness coming so maybe that will take care of the problem. Do you think the new sensor is bad now? |
Bryan |
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drp53188
Senior Member
89 Posts |
Posted - 03/28/2018 : 10:12:02 AM
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| Yep , it`s the wiring !! |
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RonF
Top Member
867 Posts |
Posted - 03/28/2018 : 10:12:20 AM
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| Doubt it. Don't blow air into it or it will be.... |
US Army retired CMBT |
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bwest
Administrator
United States
3820 Posts |
Posted - 03/28/2018 : 12:14:41 PM
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| lol, I don't plan to blow into it! |
Bryan |
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bwest
Administrator
United States
3820 Posts |
Posted - 03/28/2018 : 12:21:27 PM
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| So, called parts and they are having a hard time finding a harness. Any secrets you guys want to give me? lol |
Bryan |
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torque
Advanced Member
Canada
358 Posts |
Posted - 03/28/2018 : 12:59:57 PM
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| Well, if you were going to pull the harness to change it anyways, inspect the connectors, and wires going into them as Ron mentioned, if all is good there, pull the harness out if needed to inspect the entire length. |
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bwest
Administrator
United States
3820 Posts |
Posted - 03/28/2018 : 1:37:00 PM
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| Going to check for chaffed wires when I get a minute. Thanks for all your help! |
Bryan |
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Cal Mc
Advanced Member
303 Posts |
Posted - 03/28/2018 : 3:26:10 PM
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We have changed lots of them. I have had them fail before leaving the yard, change it again and the problem goes away. I have boxes of old ones here. Just waiting for an International rep. to walk in the door. I am going to fill his pockets with them before he leaves.
Take one of the sensors apart, then try to justify the ridiculous price that we pay. |
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slippert
Top Member
USA
630 Posts |
Posted - 03/29/2018 : 04:32:55 AM
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| A few years ago those sensors were under a recall? field fix? not sure what...anyway didn't pay for most of the ones that went bad... at that time thru IH you could purchase them for like 35 bucks... a year or so later they same sensor had jumped to $135 if not under warranty... could never figure out why cost jumped? other than they could set what ever price they wanted... |
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bwest
Administrator
United States
3820 Posts |
Posted - 03/29/2018 : 05:19:01 AM
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| Yeah, I'm not happy with the price either. 190 bucks through Rush Truck Centers! I really didn't like the place there before they bought it. Now, I really don't like them. They have lost a lot of business since they purchased it. Went from a 24 hour shop down to 16 hours a day. |
Bryan |
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bwest
Administrator
United States
3820 Posts |
Posted - 04/02/2018 : 09:18:56 AM
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| OK, no bad wires that I can see. These wires go into the harness that has the DOC sensors and the last sensor behind the DPF. Then, on the front end, it goes into the harness that goes right into the ECM. Any ideas what I'm dealing with? Do I replace the Delta and go on or can it be the harness? |
Bryan |
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bwest
Administrator
United States
3820 Posts |
Posted - 04/02/2018 : 11:46:45 AM
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| Well, talked to the guys at Midwest Transit (did I mention I love the guys at Midwest?). Anyway, I've tested the wires between the Delta Sensor connector and the ECM and they test good. Next step is to swap delta sensors with a sister bus just for grins and giggles. |
Bryan |
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bwest
Administrator
United States
3820 Posts |
Posted - 04/03/2018 : 05:22:07 AM
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| So, I radioed the guy that drives the sister bus to leave his bus with me today. Oh yeah, I'm going to do that because the check engine light is on and it loses power and smokes. Great!! |
Bryan |
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torque
Advanced Member
Canada
358 Posts |
Posted - 04/03/2018 : 05:42:18 AM
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If memory serves correct, I tried our local international dealer a while back for a Cummins EGDP sensor and when he was done crossing the part number it ended up the same international party number as one we had gotten earlier for 6.4. 3626432C1
So, are they all the same? |
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bwest
Administrator
United States
3820 Posts |
Posted - 04/03/2018 : 07:02:22 AM
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| So, what are you thinking? You think trying a different manufacturer would be an option. |
Bryan |
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torque
Advanced Member
Canada
358 Posts |
Posted - 04/03/2018 : 07:17:11 AM
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I was thinking you could use one from any of your buses that have one instead of a sister bus.
But your idea is a good one too. I have replaced 2 sensors on IH buses because the sensor was bad, we have 14 IH buses with DPF, close to 30 Visions with Cummins that have DPF, only replace the one on a Vision and it was because one of the fellows broke the nipple for the hose, not because the sensor failed. All other problems we had with the sensor have been wires rubbed through. |
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bwest
Administrator
United States
3820 Posts |
Posted - 04/03/2018 : 08:25:26 AM
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| I don't have any other buses with DPFs. Went all propane after these two buses. I did get this swapped with the other bus. Code followed the part. Incidentally, the sensor on the other bus had the nipple broken off. I can't win for losing with these two buses. It didn't even set a code for it. It did have a code for the temp sensor between the DOC and DPF. It was unplugged. |
Bryan |
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Topic |
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IC CE200 (Maxxforce DT) DPF Delta Sensor
