Cummins NTC 400 Big Cam 3
03-27-2019, (Subject: Cummins NTC 400 Big Cam 3 ) 
Post: #3
RE: Cummins NTC 400 Big Cam 3
A quick test of the STC valve is to cap off the fuel pressure signal line from the fuel pump and apply air to the valve with the engine running. You'll notice a very obvious change in overhead noise if it's working.
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RE: Cummins NTC 400 Big Cam 3 - Signature620 - 03-27-2019



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