Having problems with your Dodge Ram 3500 ?

Low turbo boost 15 # max turbo, exhaust manifold, wate gate charge air cooler, gauge nad engine diagnostics all checked still low power this in a monaco motorhome

Posted / edited by AnonymousUser on : 18-06-2018

Answers :

Possible causes of low turbo boost.
\015\012\015\012Intake system leaks. This covers a lot of components and is\015\012therefore the most common problem. Any leak between the compressor and the\015\012intake of the head can allow boost pressure out. Small leaks may reduce boost a\015\012little, large leaks may not allow any boost at all to develop. I check 3 main\015\012areas for leaks. 1) the big pipes – ie the two rubber intercooler connecting\015\012pipes,, the rubber connector pipe just in front of the throttle and the rubber\015\012connector on the turbo compressor outlet side. Check the band clamps for all\015\012these connectors and check that they are not split – including the not so\015\012visible undersides. Check that the connector has not separated from the metal\015\012pipe it connects to – sometimes they blow off under high boost and sometimes\015\012they do not slide onto their metal hose properly when reinstalling after work.
\015\012\015\012Next look at the vacuum plumbing to the fuel rail, BOV, fuel\015\012vapour system, and heater system. There\015\012are several T pieces that can break or sometimes the hard plastic hoses may\015\012have pulled out of the joining rubber sleeve if disturbed during work on the\015\012car. This is especially true near the firewall on the battery side where there\015\012are several vacuum connectors amongst the wiring looms. If no leaks have been\015\012found yet check the wastegate as described below. If the wastegate is OK it is time to pull off\015\012the manifold and check the rest of the plumbing underneath that area. With the\015\012intake manifold removed it is possible to check the vac lines to the temp/vac\015\012switch which controls the fuel vapour system. You can also inspect the plumbing\015\012to the idle stabilizer valve and the brake booster hoses. The hoses to the\015\012cycling valve can also be inspected at this time. Although they are not\015\012commonly a problem you should also inspect the sealing between the manifold and\015\012the head (gaskets) and the seal between the throttle and the manifold (Oring).
\015\012\015\012Wastegate stuck partially open. An open wastegate will allow\015\012exhaust gasses to bypass the turbo and hence little or no boost will build.\015\012With the car cool, start it up and position yourself so that you can put your\015\012hand on the exhaust near the catalytic converter. You will feel the exhaust get\015\012warm but the pipe that runs alongside the catalytic converter should remain cool\015\012because normally the wastegate is closed and prevents exhaust gas going through\015\012that pipe. If that pipe heats up like the rest of the exhaust then your\015\012wastegate is a problem – its allowing the exhaust gas to bypass the turbo.Weak\015\012spring in wastegate If the spring in\015\012your wastgate has weakened then it may not be strong enough to hold the\015\012wastegate valve closed when exhaust pressure builds up. It may therefore start\015\012to open before boost builds sufficiently high. This can be overcome to some\015\012extent by shimming the wastgate which is merely adding space between the two\015\012halves of the wastegate thus pretensioning the spring. Turbine failure If a\015\012foreign object has entered the intake system the compressor may shred itself.\015\012This has happened before when nuts or bolts accidentally find their way into\015\012the intake plumbing. Check this by removing the intake plumbing until you can\015\012see into the turbo intake – inspect the blades. Ensure that the turbo spins\015\012freely. Grasp the end of the turbine shaft and see if can move side to side (it\015\012should not).
\015\012\015\012Blocked exhaust / catalytic converter. Two failures\015\012can occur here. The double walled exhaust pipe connected to the front of the\015\012catalytic converter can collapse and block the flow of exhaust. This probably\015\012wont be obvious from external inspection. The other and more common problem is\015\012that the material in the catalytic converter may have melted over in places\015\012causing a severe restriction to exhaust flow and preventing boost from\015\012developing. Failed boost controller. Boost controllers come in various types\015\012and can possibly fail in such a way as to cause a vacuum/boost leak or cause\015\012the wastegate to open prematurely. Manual boost controllers can blow out their\015\012plugs if the plugs are not seated tightly. The stock cycling valve can fail and\015\012dump all boost to the wastegate so that it opens and does not allow the boost\015\012to build sufficiently high.DME/KLR problems.if the DME or KLR has detected a\015\012problem it may intentionally restrict boost \015\012to 1.2 bar sorry its long winded but i think i have covered it all...hope this helps
\012Lost power due to low turbo boost Cause: PacBrake cylinder pivot mount broke and causing butterfly to block exhaust flow to turbo.\012First place to look is for leaks in the CAC (Charge Air Cooler, aka After-cooler, aka Inter-cooler). As far as problems it could be a number of things from a leak in the CAC or a connection between tubing and CAC or intake. It could also be a restricted air filter.Also a significant crack in the inter-cooler radiator can cause this low turbo problem.Get the battery checked.Is it properly charged.\012How long should the generator run in order to charge the batteries?
Generator run time will depend on battery state of charge. Returning a discharged battery back to 100 percent charge may require a week of generator run time. Using a battery hydrometer is the preferred way to check battery state of charge.
\012Why does the generator set shut down?
Due to computerized programming installed within the genset, the component may automatically disengage due to low oil, high water temperature, overload, and low fuel in the tank or air in the fuel line.
\012First, confirm that the battery cut-off switch is on. Next, check the fuse in the domestic fuse panel (usually located in the bedroom) for power. If 12-Volt power is present, check the water pump for power. If there is power going to the water pump, confirm that there is a good ground. On models with a latching controller, check for power and ground at the controller. Once it has been verified that there is good 12-Volt power and ground at the water pump, have the water pump and controller inspected for potential replacement.\012Monaco is famous for grounding problems in the gauge panel.\012Thanks. Keep updated for any more query. You can rate this solution and show your appreciation
Repair Help & Product Troubleshooting for Dodge Ram 3500

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