Mopar1973Man

Flushing the Coolant System Draining Coolant On a cool engine (less than 140*F) remove the radiator cap. Now at the bottom of the radiator, there is a drain valve on the radiator. The drain turns 1/2 turn then pulls outward slightly then continues to turn to drain. To drain the overflow bottom it just easier to remove the hose from the radiator neck and then pull the overflow bottle upwards from the fan shroud. Flushing Cooling System Flushing the cooling system you'll need to remove the thermostat. There are three 8mm head bolts holding the cover in place. Once the cover is removed you can lift the thermostat out. Now replace the thermostat cover and the upper hose. The upper hose should only be hooked to the thermostat housing. This will direct the water away from the fan for you. Now using a garden hose at full flow you can place it in the radiator fill neck. Start the truck. Allow the water to flow till all solid debris and coolant color is gone. The water should come out clear. You can lightly rev the engine to pump water forceful for bursts. This will help push water through the heater core flushing it as well. Take notice the radiator is removed in this flushing. Filling With Coolant Now as for coolant, our trucks came factory with green coolant. You may use green, yellow (universal) or orange (HOAT). Just remember "Universal Yellow" typically can be mixed with green or orange coolants in an emergency. NEVER mix green and orange coolants! If you are going to switch coolant make sure to flush the system thoroughly. I typically will park the truck on a nose down slope to attempt to get water out of the system. Cummins cooling system holds 6 gallons typically there is roughly a gallon trapped in the block. So the first gallon goes in full strength. All other coolant is mixed 50/50 before using after the first gallon. As for mixing coolant and water. Most suggest distilled water be used. Now back during the flushing, I had removed thermostat now you can fill the entire system till its right to the top of the block. This allows you to fill without having to burp the system later. Now once the block is full to the top you can install a new thermostat (suggested) or re-use your old thermostat. Re-assemble your thermostat housing. Make sure to use anti-seize on the thermostat bolts. Re-assemble your upper hose. Now finish topping off the cooling system with mixed coolant. Make sure to fill the overflow bottle to the FULL mark. Coolant Color & Condition I'm going to say don't open the radiator cap and look and say, "Yep it's still (whatever color) its still good." I've heard this a million times. If a customer is willing I drain their radiator and show them typically the first gallon comes out rusty brown, then may change back to coolant color slowly as it drains. What happens is every time you start your engine your passing high current flow through the block and tends to change the pH of the coolant just like changing a battery. So over time coolant will shift from pH of 7 and typically shift corrosive. Lime scale builds up typically is from not the water but from dissolving metals in the cooling system from the corrosive coolant. So don't get hung up on the idea of long interval coolants like HOAT or distilled water will protect you from scale build up. You can still get scale build up with distilled water or premixed coolants. Simply put if the coolant starts to darken in color it already failed. Personal Results As for my truck the first 150k miles was on green coolants. I was flushing the system every 30k miles or so. I will clearly state I've NEVER used distilled water in my truck. I've used either the irrigation water which is from a creek behind the house or from the well that is here on the property. No water here is treated or chlorinated. I'm now using "Universal Yellow Coolant" typically found as WalMart SuperTech, Prestone, and even Napa coolants. I've never had an overheat once. I've never had a heater core plug up. No limescale build up. 100k miles and 5 years.... Updated pictures... This is my cooling system after 9 years and 180K miles now... 2015 (13 years later) and 255k miles later.... Using Universal Yellow Coolants. Still no scale build up or cooling issues. This batch was extended to 70,000 roughly and 2 years. 350k miles 07/20/2018. Coolant change with NAPA Extended Life. July 2019 - 385k miles and replaced the oil cooler gasket. As you can see after 17 years of service and using tap water (well water) or creek water like I have there is zero scale build up yet. View full Cummins article

CCD (Chrysler Collision Detection) Data Bus Description The Chrysler Collision Detection (also referred to as CCD or C2D ) data bus system is a multiplex system used for vehicle communications on many Chrysler Corporation vehicles. Within the context of the CCD system, the term “collision“ refers to the system’s ability to avoid collisions of the electronic data that enters the data bus from various electronic control modules at approximately the same time. Multiplexing is a system that enables the transmission of several messages over a single channel or circuit. Many Chrysler vehicles use this principle for communication between the various microprocessor based electronic control modules. Many of the electronic control modules in a vehicle require information from the same sensing device. In the past, if information from one sensing device was required by several controllers, a wire from each controller needed to be connected in parallel to that sensor. In addition, each controller utilizing analog sensors required an Analog/Digital (A/D) converter in order to “read“ these sensor inputs. Multiplexing reduces wire harness complexity, the sensor current loads, and controller hardware because each sensing device is connected to only one controller, which reads and distributes the sensor information to the other controllers over the data bus. Also, because each controller on the data bus can access the controller sensor inputs to every other controller on the data bus, more function, and feature capabilities are possible. In addition to reducing wire harness complexity, component sensor current loads and controller hardware, multiplexing offers a diagnostic advantage. A multiplex system allows the information flowing between controllers to be monitored using a diagnostic scan tool. The Chrysler system allows an electronic control module to broadcast message data out onto the bus where all other electronic control modules can “hear” the messages that are being sent. When a module hears a message on the data bus that it requires, it relays that message to its microprocessor. Each module ignores the messages on the data bus that are being sent to other electronic control modules. With a diagnostic scan tool connected into the CCD circuit, a technician is able to observe many of the electronic control module function and message outputs while; at the same time, controlling many of the sensor message inputs. The CCD data bus, along with the use of a diagnostic scan tool and a logic based approach to test procedures, as found in the Diagnostic Procedures manuals, allows the trained automotive technician to more easily, accurately and efficiently diagnose the many complex and integrated electronic functions and features found in today’s vehicles. Operation The CCD data bus system was designed to run at a 7812.5 baud rate (or 7812.5 bits per second). In order to successfully transmit and receive binary messages over the CCD data bus, the system requires the following: Bus (+) and Bus (–) Circuits CCD Chips in Each Electronic Control Module Bus Bias and Termination Bus Messaging Bus Message Coding Following are additional details of each of the above system requirements. Bus Circuits The two wires (sometimes referred to as the “twisted pair”) that comprise the CCD data bus are the D1 circuit [Bus (+)], and the D2 circuit [Bus (–)]. The "D" in D1 and D2 identify these as diagnostic circuits. Transmission and receipt of binary messages on the CCD data bus are accomplished by cycling the voltage differential between the Bus (+) and Bus (–) circuits. The two data bus wires are twisted together in order to shield the wires from the effects of any Electro-Magnetic Interference (EMI) from switched voltage sources. An induced EMI voltage can be generated in any wire by a nearby switched voltage or switched ground circuit. By twisting the data bus wires together, the induced voltage spike (either up or down) affects both wires equally. Since both wires are affected equally, a voltage differential still exists between the Bus (+) and Bus (–) circuits, and the data bus messages can still be broadcast or received. The correct specification for data bus wire twisting is one turn for every 44.45 millimeters (1 3⁄4 inches) of wire. CCD Chips In order for an electronic control module to communicate with the CCD data bus, it must have a CCD chip (Fig. 5). The CCD chip contains a differential transmitter/receiver (or transceiver), which is used to send and receive messages. Each module is wired in parallel to the data bus through its CCD chip. The differential transceiver sends messages by using two current drivers: one current source driver, and one current sink driver. The current drivers are matched and allow 0.006 ampere to flow through the data bus circuits. When the transceiver drivers are turned On, the Bus (+) voltage increases slightly, and the Bus (–) voltage decreases slightly. By cycling the drivers On and Off, the CCD chip causes the voltage on the data bus circuit to fluctuate to reflect the message. Once a message is broadcast over the CCD data bus, all electronic control modules on the data bus have the ability to receive it through their CCD chip. Reception of CCD messages is also carried out by the transceiver in the CCD chip. The transceiver monitors the voltage on the data bus for any fluctuations. When data bus voltage fluctuations are detected, they are interpreted by the transceiver as binary messages and sent to the electronic control module’s microprocessor. Bus Bias And Termination The voltage network used by the CCD data bus to transmit messages requires both bias and termination. At least one electronic control module on the data bus must provide a voltage source for the CCD data bus network known as bus bias, and there must be at least one bus termination point for the data bus circuit to be complete. However, while bias and termination are both required for data bus operation, they both do not have to be within the same electronic control module. The CCD data bus is biased to approximately 2.5 volts. With each of the electronic control modules wired in parallel to the data bus, all modules utilize the same bus bias. Therefore, based upon vehicle options, the data bus can accommodate two or twenty electronic control modules without affecting bus voltage. The power supplied to the data bus is known as bus biasing. Bus bias is provided through a series circuit. To properly bias the data bus circuits, a 5 volt supply is provided through a 13 kilohm resistor to the Bus (–) circuit (Fig. 6). Voltage from the Bus (–) circuit flows through a 120 ohm termination resistor to the Bus (+) circuit. The Bus (+) circuit is grounded through another 13 kilohm resistor. While at least one termination resistor is required for the system to operate, most Chrysler systems use two. The second termination resistor serves as a backup (Fig. 7). The termination resistor provides a path for the bus bias voltage. Without a termination point, voltage biasing would not occur. Voltage would go to 5 volts on one bus wire and 0 volts on the other bus wire. The voltage drop through the termination resistor creates 2.51 volts on Bus (–), and 2.49 volts on Bus (+). The voltage difference between the two circuits is 0.02 volts. When the data bus voltage differential is a steady 0.02 volts, the CCD system is considered “idle.” When no input is received from any module and the ignition switch is in the Off position for a pre-programmed length of time, the bus data becomes inactive or enters the ”sleep mode.” Electronic control modules that provide bus bias can be programmed to ”wake up” the data bus and become active upon receiving any predetermined input or when the ignition switch is turned to the On position. Bus Messaging The electronic control modules used in the CCD data bus system contain microprocessors. Digital signals are the means by which microprocessors operate internally and communicate messages to other microprocessors. Digital signals are limited to two states, voltage high or voltage low, corresponding to either a one or a zero. Unlike conventional binary code, the CCD data bus systems translate a small voltage difference as a one (1), and a larger voltage difference as a zero (0). The use of the 0 and 1 is referred to as binary coding. Each binary number is called a bit, and eight bits make up a byte. For example: 01011101 represents a message. The controllers in the multiplex system are able to send thousands of these bytes strung together to communicate a variety of messages. Through the use of binary data transmission, all electronic control modules on the data bus can communicate with each other. The microprocessors in the CCD data bus system translate the binary messages into Hexadecimal Code (or Hex Code). The hex code is the means by which microprocessors communicate and interpret messages. When fault codes are received by the DRBIII scan tool, they are translated into text for display on the DRBIII screen. Although not displayed by the DRBIII for Body Systems, hex codes are shown by the DRBIII for Engine System faults. When the microprocessor signals the transceiver in the CCD chip to broadcast a message, the transceiver turns the current drivers On and Off, which cycles the voltage on the CCD data bus circuits to correspond to the message. At idle, the CCD system recognizes the 0.02 voltage differential as a binary bit 1. When the current drivers are actuated, the voltage differential from idle must increase by 0.02 volt for the CCD system to recognize a binary bit 0. The nominal voltage differential for a 0 bit is 0.100 volts. However, data bus voltage differentials can range anywhere between 0.02 and 0.120 volts. Bus Failure The CCD data bus can be monitored using the DRBIII scan tool. However, it is possible for the data bus to pass all tests since the voltage parameters will be in “range“ and false signals are being sent. There are essentially 12 “hard failures“ that can occur with the CCD data bus: Bus Shorted to Battery Bus Shorted to 5 Volts Bus Shorted to Ground Bus (+) Shorted to Bus (–) Bus (–) and Bus (+) Open Bus (+) Open Bus (–) Open No Bus Bias Bus Bias Level Too High Bus Bias Level Too Low No Bus Termination Not Receiving Bus Messages Correctly Refer to the appropriate diagnostic procedures for details on how to diagnose these faults using a DRBIII scan tool. Bus Failure Visual Symptoms & Diagnosis The following visible symptoms or customer complaints, alone or in combination, may indicate a CCD data bus failure: Airbag Indicator Lamp and Malfunction Indicator Lamp (MIL) Illuminated Instrument Cluster Gauges (All) Inoperative No Compass Mini-Trip Computer (CMTC) Operation Wiring Diagrams View full Cummins article

We had a long running thread about the Raptor pump and one guy found the seals and bearing, brushes everything to rebuild it.

I know there is a thread on here from way back about 2 years where we discussed about Raptor fuel pump and seals some one found all this stuff and now I would like to look into it.

Something to be aware of. If you got to do APPS reset too much you have the first signs of a bad alternator. All the APPS reset does is allow the ECM to see the voltage at idle and WOT. So as for your question about reset again for the pump you shouldn't have too.

As long as the high idle software is enabled shouldn't matter which programmer or module you use.

Yeah there is... That little SUV could of slowed down and just stayed in the right lane and never lost control. I've watch tons of this kind of Youtubes 99% of all accidents are people traveling to fast for conditions. So here is mister Semi driver minding his own business, here comes "I'm in Hurry SUV Driver" bouncing off the other delievery truck and into the path of mister Semi. I still see out here with completely snow cover or black ice highways watching little cars attempting to hold speed limit.

Lost Valley Reservoir Summer of 2015

Still after washing I re-coat the terminal with engine oil again. There is only two material that I know of that sulphric acid will not eat. Glass and plastic. Plastic is made from what? Petroleum. Grease works but you'll end up with the grease on your shirt or arm while working on your truck. Engine oil will fade away leaving a thin film that prevents acid from oxidizing the terminals. Take notice to the picture above the positive terminal is black and got corrosion blooms on the copper and steel. This is a sign of acid contact and oxidizing the metals. Like lead oxide is that black coating. It's resistive to current flow typically you know by touch the terminals they could be warm to hot to the touch.

Secret... Lightly coat all lead terminal surface with engine oil not grease. 13 years later still like new... What I typically see roll in my shop...

I would park that truck till you can verify the fuel pressure. I just got done rescuing a truck yesterday where his fuel pump would just stop pumping doing exactly what you say low power and white smoke. You need that fuel pressure gauge like now! Do you have a error code reader that can reset codes? You might consider reseting the codes and re-test drive it again and see if the codes are real for the APPS. Might have to ohm test between the ECM and APPS. Again jump over to the error code page and do the diagnostics to verify. Yeah you can unplug the wiring and hook up stock to see if the P0237 code stays away. Grid heater relays get there ground from PDC then to the battery ground as seen in the wiring map.

Cobbled up it sounds like. Grid heater delete is going to make it hard starting and keeping it running. Fuel pressure is fairly low in the 1st gens like about 6-7 PSI tops. I know Cowboy should be in later tonight and give some more feedback on this.