supernono

I have a clicking noise coming from the engine. I also noticed that the engine is not idling correctly. It’s making the noise that a spark plug wire would do when it is arching. I did change the plugs last week, but I need to investigate to see what is happening. It also sounds like the noise the O2 sensor makes when it is not working properly. I guess I’ll need to take it in to get a diagnosis

zepeda1

I also have a 2001 and I'm getting a clicking/tapping noise. But it only makes the noise at start up's when the engine is cold. The noise will go away after about 10 seconds after the engine is started.

jthomp23777

I have a 2001 Hoe. It is normal for the engine tapping for a few seconds until oil pressure builds up. I heard everything from valve knocking to piston slap.It just the nature of the beast. I use different oil filters, tried a heavier oil, even tried excorcism, didn't help.Some suggest to change to a heavier oil, I wouldn't recommend it though, Stay within your factory guildlines.

supernono

I stopped by the dealer this morning and talked to someone there and they heard the clicking noise. He also suggested that the noise was coming from a spark plug wire/ spark plug that is arching. He told me to put the vehicle in a dark garage and try using a water bottle to lightly spray the wires to see if I can get it to spark. I thinking that might work. I just called a parts place and got a quote for 52.00 for oem delphi 7mm wires. The wires were very hard to take off when I changed the plugs last week so I may have damaged one. I think I will just replace all the wires since my tahoe has 101k. I'll follow-up if this was it.... Thanks for all the other suggestions.

supernono

The new spark plug wires fixed my problem. I guess when I was replacing my plugs 2 weeks ago I was not careful enough when removing the wires.