Question about 1994 Chevrolet C2500

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2500 4x4 5.7 began pinging hard on acceleration

Just out of the blue, truck began pinging, nothing has been fixed or otherwise messed with under the hood lately, knock sensor possibly?

Posted by Anonymous on


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Posted on Jan 02, 2017

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SOURCE: 1997 Chevrolet Silverado Fuel System

Hello Johnholley
I am wondering do you hear the fuel pump when you just turn the key into the on run position not crank just in run and listen and see if you hear the fuel pump run for a second, If you don't hear it you will want to check for power at the fuel tank, and have some one cycle the key while your under the truck with a test light. Hopefully you have power and you hear the fuel pump run. Now if you do hear the fuel pump running then the next thing you will want to check is for spark, It could be the ignition module or pickup coil. check out those thing and I am sure you will be able to figure out whats going on. If you don't get back to me and we can try a few other methods. I sure hope that helps you out johnholley. and thanks for using Fix Ya Bear001

Posted on Jul 20, 2008

  • 102 Answers

SOURCE: knock and ping under acceleration

Try using a higher octane fuel. higher than 94

Posted on Nov 28, 2009

  • 4340 Answers

SOURCE: I have a 2002 Silverado.

WEll, it certainly can be an exhaust leak. Take a heater hose and hold one end up to your ear and probe around with the other end. Exhaust manifolds are a big issue, these days.

Posted on Sep 09, 2010

  • 128 Answers

SOURCE: ls1 motor has a tip

You should take it in or if you know how check the timming on the vehicle if the timming is out it will cause this.There could also be a dead cylinder causing this problem is the check engine light on? Could be caused by a bad plug or wire.

Posted on May 04, 2011

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