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Old 12-08-2018, 03:25 PM   #1
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8.3 ISX Clicking sound

I bought my RV a year ago and ever since I have had it, I hear consistent clicking sound coming from the right side near the rear storage compartment. It almost sounds like an ignitor or something like that.
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Old 12-08-2018, 05:49 PM   #2
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The 8.3L engine is an ISC, the ISX is actually 14.9L, it's called a 15L though. It would help to know which engine and mileage.
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Old 12-09-2018, 11:48 AM   #3
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Iím am sorry. It is 380 ISL motor.
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Old 12-10-2018, 08:56 AM   #4
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Thanks for the update. Do you hear the clicking when the ignition is on but engine not running?
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Old 12-11-2018, 04:22 AM   #5
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As soon as the ignition is turned on. Engine running or not. 7000 miles on it. Done it since I bought it.
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Old 12-11-2018, 09:28 AM   #6
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Could be the water heater igniter. I would turn on the ignition and start pulling fuses till the sound stops. This will help you locate the problem, if itís a problem.

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Old 12-12-2018, 04:12 PM   #7
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If you want to isolate the igniter, just turn it off.
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Old 12-12-2018, 10:22 PM   #8
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Quote:
Originally Posted by TR4 View Post
Could be the water heater igniter. I would turn on the ignition and start pulling fuses till the sound stops. This will help you locate the problem, if itís a problem.

Bill
12V water heater is not connected to the ignition key-in any way. Your pulling fuses suggestion is a good beginning point though!
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Old 12-13-2018, 08:38 AM   #9
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Some ISC and ISL engines with the CAPS injection pump have a lift pump that runs for a short period of time when the key is first turned.
The following is from an add for an aftermarket lift pump.
My ISC lift pump also ran about 30 sec everytime I put the key in the on position.
"This heavy duty adjustable fuel pump is designed to meet the demands of the added strain of a performance module on the CAPS fuel system. The CAPS fuel system is known to be a weak fuel system as the factory lift pump only engages for the first 30-45 seconds after the key-switch is engaged. After this, the CAPS pump "pulls" the fuel and acts as the only pump in the system. By adding this heavy duty pump, not only are you taking away a lot of stress on the CAPS pump but you are also providing a steady flow of fuel that will help cool and lubricate the pump to increase the reliability and longevity of the CAPS pump. This adjustable pump is rated at 95 gallons of diesel fuel per hour and come preset at 15 PSI. Using a 1/8" Allen plug, you can make a quick clockwise adjustment to increase pressure or counter clockwise to decrease pressure."
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