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Does it only make the noise when you are accelerating? or does is it present all the time? I have a 2002 avalanche and sometimes if you get some bad gas cause lets be honest you don’t always get 87 octane even though it says it is. you can run 93 or higher through it and it solves what I call spark knocks. If the noise is there all the time then it is probably a lifter or a valve issue. You can watch some YouTube videos on manifold removal and valve cover removal, its not to difficult just a lot of disconnecting things and time consuming.
Does it only make the noise when you are accelerating? or does is it present all the time? I have a 2002 avalanche and sometimes if you get some bad gas cause lets be honest you don’t always get 87 octane even though it says it is. you can run 93 or higher through it and it solves what I call spark knocks. If the noise is there all the time then it is probably a lifter or a valve issue. You can watch some YouTube videos on manifold removal and valve cover removal, its not to difficult just a lot of disconnecting things and time consuming.
I just had the same issue, I lost a tremendous amount of power and after awhile I started getting misfire codes. It was my catalytic converter that was causing it all. I had my knock sensors go bad so I replaced those and my manifold gasket, about three days later I got the P0420 code. I took it to a local redneck muffler shop and 125$ later it was almost back to new. I do recommend if you have driven with that code for awhile that you check your manifold gasket for leaks or for any vacuum leak for that matter, spark plugs and wires, o2 sensors, and catalytic converter. Sometimes one thing can cause another which is what I believe happened to me.
I just had the same issue, I lost a tremendous amount of power and after awhile I started getting misfire codes. It was my catalytic converter that was causing it all. I had my knock sensors go bad so I replaced those and my manifold gasket, about three days later I got the P0420 code. I took it to a local redneck muffler shop and 125$ later it was almost back to new. I do recommend if you have driven with that code for awhile that you check your manifold gasket for leaks or for any vacuum leak for that matter, spark plugs and wires, o2 sensors, and catalytic converter. Sometimes one thing can cause another which is what I believe happened to me.
1. 1990 Ford Probe (POS) 2. 1998 Isuzu hombre 3. 2002 F-150 4. 2002 Ford Mustang 5. 1992 Subaru SVX 6. 1991 Mitsubishi 3000GT 7. 1968 Chevrolet Camaro 327 8. 1971 Chevrolet Chevelle SS 454 (rebuilt junkyard find) 9. 2002 Ford Explorer sport 10. 2002 Chevrolet Avalanche 1500 11. 1997 Chevrolet Silverado 350 12. 2009 Nissan Rogue
1. 1990 Ford Probe (POS) 2. 1998 Isuzu hombre 3. 2002 F-150 4. 2002 Ford Mustang 5. 1992 Subaru SVX 6. 1991 Mitsubishi 3000GT 7. 1968 Chevrolet Camaro 327 8. 1971 Chevrolet Chevelle SS 454 (rebuilt junkyard find) 9. 2002 Ford Explorer sport 10. 2002 Chevrolet Avalanche 1500 11. 1997 Chevrolet Silverado 350 12. 2009 Nissan Rogue
