What causes an ISL 400 engine to overheat?
I too have had what looks like overheating problems with a Cummins ISL 400 in a 2006 Newmar Dutch Star on a Spartan chassis. Temperatures on the Jellico Pass of I75 would run from 195 up to 235 on the dash gage.Then we blew a hose from the engine at the HydroHot system. This hose was by Newmar.
How can I Fix my Cummins ISL 400hp engine?
Fix easy and inexpensive. In a pinch, you can buy larger hose clamps from a hardware store or other source and gang them together to get the make shift clamp around boost side of the turbo plumbing failure. Even helped a fellow heavy hauler do that one night when he did not want to bothered by a set of Kansas scales on I-70.
How big is the side radiator on a 400 ISL?
Our 400 ISL runs between 173 and 183 except on the hottest days and steepest long grades. I’ve never seen it above 200 either on the analog or digital gauge. We have the side radiator which I measure to be about 1100 square inches. Our charge air cooler and transmission cooler are all nested.
What do the ISL and ISC codes mean?
These ISL & ISC codes are for quick reference to find out what your fault means. ISL & ISC codes can help pinpoint the problem and save hours of frustration. For Cummins ISL & ISC codes on earlier models (2002 and before) use ISC and ISL codes, CAPS fuel system.
What are the ISL codes for Cummins ECM?
122 Intake Manifold Pressure Sensor Circuit – Voltage Above Normal or Shorted to High Source 123 Intake Manifold Pressure Sensor Circuit – Voltage Below Normal or Shorted to Low Source 124 Intake Manifold One Pressure – Data Valid but Above Normal Operational Range – Moderately Severe Level
What is the ISC Code for a Cummins solenoid?
322 Injector Solenoid Driver Cylinder 1 Circuit – Current Below Normal, or Open Circuit 323 Injector Solenoid Driver Cylinder 5 Circuit – Current Below Normal, or Open Circuit
What should the RPM be on a Cummins 400?
Keeping the RPM up on steep grades doesn’t help much. TEMP RUNS FROM 195 TO 236 KEEPING RPM UP ON STEEP GRADES DOESN’T HELP MUCH. Welcome to the FMCA Forum.
When did Cummins change the ISL fuel system?
In 2003, Cummins released the updated ISL engine. Among other differences, the most significant was the change to the High Pressure Common Rail (HPCR) fuel system. The new fuel system eliminated the CAPS injection pump, relying on electronic controlled injectors to actuate fuel. Use the charts below for useful information for the ISL engine:
What does the Mil light on a Cummins Engine mean?
Check Engine Lamp Lights up to warn the driver to seek service soon. Flashing Check Engine Lamp Will flash for 30 seconds at key ON if maintenance is due. Malfunction Indicator Lamp (MIL) Lights up to warn the driver to schedule service soon. May light up in addition to other lamps. Red Stop Engine Lamp