hey guys i have a ticking noise going on its been thier sence i got the truck.. i have done no cam or any valve work at all. i did a search but they all related to cam swaps.... its on the pass side but cant seem to pin point the location... does anyone know anything that could help... another thing that it has done sence i got it was a rough idle not sure if thats related or not..... but give me ideas and how to fix it... im kinda bored right now i dont have any new parts coming in

 

piston slap?

 

no i got that to but that only last about 10 seconds when its the middle of january iv leanred to live with that.... its much quieter than piston slap i cant hear it at all when im in the cab..... also the ticking is present alsways, doesnt matter on rpm or anything... doesnt get louder just ticks faster

 

stuck lifter??

 

Vacuum leak by the sounds of it. Will cause a rough idle because it is letting in unmetered air (not passing through the MAF) and causing a lean mixture and resulting rough idle.

 

maby exaust manafold gasket?? Mine is leaking as we speak

 

Mine has been ticking since day one...sounds like a lifter to me, but it keeps on running.

As for your rough idle, if you have an exhaust leak, that could cause both the ticking noise, and give the O2 sensor on that bank a false reading.

Other things to check:

Clean the throttle body
Spark Plugs
Wires
Vacuum leak
Internal engine problem (burnt or sticking valve, broken valve spring, etc.)
Fuel filter
Fuel pressure regulator (Not sure what year your truck is and how many miles it has)...but if you have an FPR, it will be in the middle of the driver's side fuel rail. Check it with the engine off by pulling the vaccum hose off it and checking for the presence of fuel. If fuel is there, or even a heavy fuel odor, the fpr is shot and needs to be replaced.

There's a bunch of different things that can cause a rough idle, I just threw a few common problems and ideas out to ya.

 

The tick and rough running sounds like a cracked plug or bad wire/coil. Do you get a DTC? You could check the misfire counters if you have a scan tool.

Dave

 

Forgot to mention that...you might even notice a spark arcing from the plug or wire to another ground if that's the problem. Like Dave mentioned, that should throw a misfire code though.

 

I would say it could still be piston slap because i have noticed a piston on one side of the enginecan resonate to the other side
Sounds far fetched I know but thats what happened to my truck
I kept hearring the noise on the pass side and two pistons on the drivers side were replaced
The noise did eventually come back and now i just deal with it till i can afford my 408 long block