The truck fires right up and runs great except for this noise which I thought for sure was a valve type noise or now that you mention it seems like it would be a worn out timing chain; however when I use the mechanics stethoscope these things sound fine. The noise is very loud when I put the probe on the fuel rail. When I put the probe on the heads, block, accessories, etc. everything sounds fine.
Maybe the fluid is just able to pickup and amplify the noise which might be created elsewhere; however with the probe I can only detect the noise on the fuel rail. I am going to try a fuel injector cleaner to see if it helps.
I do have a fuel pressure tester so I will test the pressure.
Last edited by 73cudaproject; 02/22/09 05:31 PM.