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TruckersReport.com Trucking Forum | #1 CDL Truck Driver Message Board
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Detroit 14L... Mystery problem, no one seen before.
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<p>[QUOTE="BoxCarKidd, post: 4865728, member: 151415"]When it is throwing fits does it blow white- gray smoke out the exhaust which may be speratic. On cold start ,With low air pressure, does it surge and blow smoke but clear up at around 60-90? PSI? If you get a widget to plug into the barometric pressure sensor harness ,which tells the computer you are above 5,000 feet or so, and it runs 80% better ( which is for test purposes only). Or it starts showing SRS & or TRS codes but nothing related corrects it. Then after lunch or tomorrow it runs great, those are all signs for what I am talking about.</p><p>When what ever shop leads you into replacing parts ask them if that will fix it? If they don't know hit the road. There is a lot of middle ground and I came to understand that engine harnesses should probably be replaced as regular maintenance at some point. If there is a Detroit Diesel dealer area in your area you might be better off there. This truck is duel draw duel return. Trash in one tank should not cause this. I would lean more toward Heavy Hauler's idea. Maybe search scanners diag tools, I thank cowpie noted an inexpensive one that would read codes plus some. With that you could see what is happening when it is cutting up. If you do not find that shout out to him (PM) he is pretty sharp on a lot of that.[/QUOTE]</p><p><br /></p>
[QUOTE="BoxCarKidd, post: 4865728, member: 151415"]When it is throwing fits does it blow white- gray smoke out the exhaust which may be speratic. On cold start ,With low air pressure, does it surge and blow smoke but clear up at around 60-90? PSI? If you get a widget to plug into the barometric pressure sensor harness ,which tells the computer you are above 5,000 feet or so, and it runs 80% better ( which is for test purposes only). Or it starts showing SRS & or TRS codes but nothing related corrects it. Then after lunch or tomorrow it runs great, those are all signs for what I am talking about. When what ever shop leads you into replacing parts ask them if that will fix it? If they don't know hit the road. There is a lot of middle ground and I came to understand that engine harnesses should probably be replaced as regular maintenance at some point. If there is a Detroit Diesel dealer area in your area you might be better off there. This truck is duel draw duel return. Trash in one tank should not cause this. I would lean more toward Heavy Hauler's idea. Maybe search scanners diag tools, I thank cowpie noted an inexpensive one that would read codes plus some. With that you could see what is happening when it is cutting up. If you do not find that shout out to him (PM) he is pretty sharp on a lot of that.[/QUOTE]
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TruckersReport.com Trucking Forum | #1 CDL Truck Driver Message Board
Forums
>
The Garage
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Trucks [ Eighteen Wheelers ]
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Commercial Truck Forums
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Freightliner Forum
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Detroit 14L... Mystery problem, no one seen before.
>
Reply to Thread