Ticking noise under hard acceleration - Dodge Cummins Diesel Forum
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post #1 of 8 (permalink) Old 03-02-2020, 09:50 PM Thread Starter
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Thumbs down Ticking noise under hard acceleration

Ole girl has a loud ticking/tapping noise
gets louder and taps progressively with rpms
starts under hard acceleration/ high boost pressures
sounds right in front of me as im driving

i never heard the tapping before I put new injectors in
the 5in exhaust and intake and boost elbow
but I wasn't hitting those boost pressures

any idea's? shes got a new lift pump.


97 12 valve, 280k miles, 120 hp injectors, cut fuel plate, 5in straight pipe, afe air intake, boost elbow, firepunk trans
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post #2 of 8 (permalink) Old 03-02-2020, 10:54 PM
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Valves or maybe one of the injectors isn't right

2012 cc dually 6speed, mini max, cooler delete, h&s intake horn, boost tube,5ich pipe,gdp big line kit Amsoil dealer since 2006
1996 12v 430000 miles. Built trans. 62mm hx 35 90hp injectors
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post #3 of 8 (permalink) Old 03-03-2020, 12:49 AM
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Could be an exhuast leak

98.5 24 Valve Quad Cab Long Box 5 Speed 4x4
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post #4 of 8 (permalink) Old 03-03-2020, 11:39 AM
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If yur truck is an auto trans, check the flex plate. It may be cracked. When cracked they will make noise under acceleration.

96 Ram 2500. 5.9 Auto, 4x4. Banks Air, split intake, 4" exhaust, HD billet torque convertor, gauges. Fuel and air tweaked a bit.
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post #5 of 8 (permalink) Old 03-23-2020, 01:18 AM Thread Starter
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The injectors checkout, the flex plate is brand new and rates for 800hp. It’s gotta be valves. I’m going to get a valve adjustment and check back in

97 12 valve, 280k miles, 120 hp injectors, cut fuel plate, 5in straight pipe, afe air intake, boost elbow, firepunk trans
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post #6 of 8 (permalink) Old 03-23-2020, 02:39 AM
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Probably just the normal sound of the injection pump and injectors at high fueling. Mine does the same thing and I've never worried. Did it before and after a valve adjustment. Have you ever heard one of these pumps running on a stand? I think there's a video of one of them.

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post #7 of 8 (permalink) Old 03-23-2020, 07:15 AM
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My lift pump is pretty noisy sometimes.

Daily driver/ workhorse: 1994 2500SLT 4x4 Auto. Hewitt EGT, Boost, Trans gauges, Under hood Mech FP gauge, Trident fuel lines, Tork Tek OFV, Mag-Hytec DD Transmission Pan, Ford manual hub conversion, Diamond eye 4" turbo back, 37337 Upgrade. 260K

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post #8 of 8 (permalink) Old 03-26-2020, 01:58 AM
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Quote:
Originally Posted by sweeney813 View Post
Ole girl has a loud ticking/tapping noise
gets louder and taps progressively with rpms
starts under hard acceleration/ high boost pressures
sounds right in front of me as im driving

i never heard the tapping before I put new injectors in
the 5in exhaust and intake and boost elbow
but I wasn't hitting those boost pressures

any idea's? shes got a new lift pump.
Bad injector? Loosen the fuel lines at the injectors one at a time with the engine running. if the noise goes away on one you have a bad injector.

1995 RAM 2500 Club Cab Laramie SLT 2 W/D 5.9 P-Pump w/ NV4500 3.54 Dana 80. Nearly stock. Timed @ 15.5* Currently 318,000 miles and counting.
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