More About Points »
San Leandro, CA
A flashing MIL lamp indicates an engine misfire which can be attributed to excessivly low idle speed. A prolonged misfire will set a diagnostic code, causing the MIL lamp to be illuminated continously. Before panic sets in, try cleaning the throttle body before you start replacing parts. Over time the bore in the throttle body becomes dirty and plugged from residue created from the combustion process. When the air gap between the throttle plate and the throttle bore becomes plugged up, this will cause stalling, usually when lifting your foot off the accelarator pedal as when comming to a stop. It can also cause a hard start condition as the Idle Air Control Motor cannot respond fast enough to compensate for the lack of "Minimum Air Flow" past the throttle plate. A dealership or repair shop can clean the throttle body for about 1 hours labor. If you are mechanically inclined, you can perform this yourself. Purchase a aersol can of Throttle Body cleaner at your automotive supply store. remove the aircleaner and duct assy exposing the throttle plate. With the engine OFF. open the throttle plate, spray the cleaner sparingly on the throttle plate and bore and wipe with a rag wrapped around your finger. repeat this until clean on throttle plate and bore. Use caution not to spray cleaner on sensors (TPS) attached to throttle body and they can be damaged by the chemicals within the cleaner. Also, be careful not to let the throttle plate close on your fingers as the return spring is quite strong. If the condition continues, then further diagnosis will be needed.
The coil packs seldom fail. Depending on the diagnostic code, a misfire code can indicate a spark plug, fuel injector, vacuum leak or internal valve problem. Your overheating issue can be related to air trapped in the cooling system. When you change coolant you must open the bleeder screw located at the upper front center of the engine. An improperly filled cooling system will lead to overheating issuesLow coolant level in a cross flow radiator will equalize in both tanks with engine off. With engine at running and at operating temperature, the high pressure inlet tank runs full and the low pressure outlet tank drops. If this level drops below the top of the transmission oil cooler, aeration will occur drawing air into the water pump resulting in the following: High reading shown on the temperature gauge. Loss of coolant flow through the heater core. Corrosion in the cooling system. Transmission oil will become hotter. Water pump seal may run dry, increasing the risk of premature seal failure. Combustion gas leaks into the coolant can also cause the above problems. .
Please provide a more detailed description on the symptoms and conditiond relating to the shifting issues, ie: engine temp, vehicle speed, gear shift position etc. Also, check and verify that the fluid level is correct and the fluid condition is good. The TSB listed below will not correct the condition as the overdrive unit is in the tail housing. the Torque Converter clutch only provides "lockup" reducing converter slippage for more of a direct drive. No relation to Overdrive operation.
the 1990 Dodge Ram 5.2/5.9L engines have multiple V-belts. One for the Power steering, Generator and ir Pump if equipped. Loosen the generator pivot bolt and adjuster bolt. Some engines may have an adjuster bolt mounted on the bracket just below the alternator.You should be able to rotate the alternator to remove the belt. You will have to remove the other belts to replace this belt.
DTC P1693 is DTC Detected in PCM. The Cummins Diesel equipped trucks have 2 Engine Computers. The ECM is a Cummins module which controls all Fuel/Emission related functions. The PCM is a Chrysler (JTEC) Controller which controls all A/C, Charging, Cruise Control, Fuel pump and Transmiaaion system functions. A Chrysler DRB3 Scan tool will have a screen to show which module to access for diagnostics. Generic scan tools may not. You will have to access the PCM to retrieve the diagnostic code stored.
The Ambient temperature sensor and mounting bracket are secured with a screw to the upper radiator support, just to the driver side of the hood latch and behind the radiator grille Temperature Sensor Remove/Install Unplug the temperature sensor wire harness connector. Remove the screw that secures the temperature sensor and mounting bracket to the radiator support and remove the sensor. Reverse the removal procedures to install. The Ambient Temp Sensor is for the temperature reading on the overhead console
Remove the 4 bolts holding the seat frame/track to the floor. Tilt seat track and recliner assembly back to Disconnect seat cushion heater element harness connectors from seat pan. Remove seat cushion and /or seatback covers by disengaging the plastic J-strap (about 6 to 10" in length) attaching seat cover from the seat cushion frame . Peel cover from foam and foam from frame access the hog rings Cut hog rings attaching seat cover seat cushion. Route seat function switches through access hole on outboard side of seat cushion. Remove seat cushion cover from seat cushion. Factory seat heater elements are built into the cushion/seatback cover. Replacement elements are self adhesive and are applied directly over the foam cushion. reverse procedure for assembly using caution to route wiring correctly.
In extreme cold temperatures as stated, many emission components can trigger the Check Engine lamp. Examples are O2 Sensor Heaters, Coolant temp stays cold too long (possible defective thermostat), Evaporative Emission Components sticking due to freezing temps. Have a Dealership find the diagnostic code for what triggered the MIL Lamp. Don't overlook a loose Gas Cap!
There are no software flashes availabe to correct a shudder condition on an 07, 300 with a NAG-1 (Hemi)transmission. I advise that you have a dealer check for proper fluid level. Fluid level must be checked with a CHRYSLER STAR SCAN tool monitoring fluid temp and a special dipstick. This is why the filler tube is sealed with a plastic cap. NAG-1 transmissions are known to have fluid leaks at the wiring connector adaptor. Fresh ATF-4+ Fluid may sometimes help the condition. Vehicles equipped with a V-6 engine have a different transmission.
The spark plugs in your engine are standard resistor plugs. Your Spark Plugs should be replaced every 30K miles. Spark plug wires should be replaced every 60K.