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Old 07-30-2021, 05:20 PM   #1
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Cummins ISL400 won't start....

My 2007 CC Allure 430 ran fine one month ago. Went to start it earlier this week. Turns over but no run. Getting "Engine Warning" light. Have fuel....fuel pump at the injector rail runs, reaches desired pressure then shuts off. Thinking the ECM or another sensor might be bad. Where is the ECM located? Have a tech coming on Tuesday to the RV resort.
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Old 07-30-2021, 06:21 PM   #2
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Log on to Cummins' website and create an account to get service information for your engine, including component locations. You'll need the serial number. If memory serves (a dubious assumption at best), the ECM is located under the injection pump on the passenger side of the block. The serial number on an ISL is on the passenger side, on the top of the (timing cover?). It's hard to see but easy to take a picture with a cell phone camera.
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Old 07-31-2021, 07:51 AM   #3
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Thank you
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Old 07-31-2021, 12:56 PM   #4
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Cummins ISL400 won't start....

Ecm is located opposite the exhaust side of the engine. I would cycle the lift pump a bunch of times and if possible crack the plug on top of the secondary fuel filter. There should be two plugs on the top of the housing. I believe there a 6 mm Allan key. Itís possible the fuel drained back and these things can get an air bubble trapped at the top of the filter housing and not start. Crack one of the plugs on the top of the secondary filter housing a have someone turn on the key to get the lift pump to cycle. There should be fuel coming out of the plug.
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