making ticking noise and a slight miss idle. I have checked

Fuel pressure
new spark plugs and wires
clean out maf sensor
clean throttle body

Im going to check the push rods , I heard that its common for bent push-rods on 5.3

2003 z71 tahoe 5.3 120,000.00 Miles

Anyone know of a good set of push rods (aftermarket) going to replace them for the heck of it .

truck only mods are

Nelsons tune (mail)
EFans

thanks guys

Jr

 

I just bought comp 3/8 hardened pushrods. stop pushrods are 5/16 in diameter from my research, but I got the hardened, larger pushrods since im doing a turbo build.

I don't know about the ticking noise. Is it occurring only while idling? Can you hear it when you're driving? Are all of the spark plugs firing correctly? I guess you got new wires and plugs so they should be good, but maybe a bad coil pack?

 

Ls motors have a slight. Tick to them.

 

Comp cam have chromoly p/r there bout 100-160

 

thanks guys for the advice will order the pushrods and fill you in ones I get her done !

 

is it tapping or ticking?

Oil could be a lil low not allowing enough pump pressure to lubricate the top end.

If my truck is 1/2 way up the dip stick tap tap tap tap but once I fill it up slightly past the operating range no tap.

 

Carbon build up piston slap from those years

 

It could be a lifter going bad causing the noise and slight misfire.