2005 Tahoe Ticking

[JPVortex]

In my most recent videos does it seem like it is misfiring still? I'm having a hard time telling if it is to be honest. Its idling how it always has but I'm wondering if its always been a rough idle and I just never paid attention to it.

 

[TollKeeper]

Start with the suggestion of the Brake Clean/Carb Cleaner, and see if you can find the source of the hiss. I can hear it, but no idea where its coming from.

Dont only spray around the vacuum lines. Also spray around the intake ports, the intake snout, the throttle body.

 

[mattbta]

IIRC, even the cheap Elm based OBD adapters with Torque Pro app will show individual cylinder misfire counts. I don’t recall what the parameters for setting a code are though.

 

[Fless]

Think about taking care of that pulley noise and get that out of the way.

 

[TollKeeper]

Or at least taking the belt off during diagnostics, it will cut down on a lot of noise. Just make sure to not let the engine run for too long.

 

[JPVortex]

@TollKeeper
Sprayed around intake ports and vacuum lines that I could see(could only see a couple) nothing happened to the idle. I forgot to do the throttle body gasket but Im going to replace while the body is off anyways. The hiss is definitely coming from the drivers side.

@mattbta Will def look into that, thanks!


@Fless Def a really good idea lol.


Here is a video of the idle without belt on

Some of the noise is also the muffler delete, which I'm going to be putting a muffler on soon.

Here is a picture of the throttle body. Will definitely be cleaning this very well, its nasty.

If none of this stuff helps I'm going to try regapping the plugs.

 

[JPVortex]

Does anyone have a vacuum line diagram? How many vacuum lines are there?

 

[OR VietVet]

Does anyone have a vacuum line diagram? How many vacuum lines are there?

I swear to GOD, that if a site did nothing but supply vacuum and electrical diagrams, they could make bucks. I know a site or two has general info for vehicles but JUST the schematics I talk about would be great.

 

[JPVortex]

I swear to GOD, that if a site did nothing but supply vacuum and electrical diagrams, they could make bucks. I know a site or two has general info for vehicles but JUST the schematics I talk about would be great.

That would be amazing! And they'd be rich haha, may consider investing the money into a smoke machine, can't go wrong with one.

 

[rockola1971]

I swear to GOD, that if a site did nothing but supply vacuum and electrical diagrams, they could make bucks. I know a site or two has general info for vehicles but JUST the schematics I talk about would be great.

There is already such a creature. Haynes.com

 

[iamdub]

@TollKeeper
Sprayed around intake ports and vacuum lines that I could see(could only see a couple) nothing happened to the idle. I forgot to do the throttle body gasket but Im going to replace while the body is off anyways. The hiss is definitely coming from the drivers side.

@mattbta Will def look into that, thanks!


@Fless Def a really good idea lol.


Here is a video of the idle without belt on

Some of the noise is also the muffler delete, which I'm going to be putting a muffler on soon.

Here is a picture of the throttle body. Will definitely be cleaning this very well, its nasty.

If none of this stuff helps I'm going to try regapping the plugs.
View attachment 389096

They should've come already gapped properly. Are they iridum or platinum? You have to be VERY careful when measuring and adjusting the gap. That tiny electrode tip can be easily be broken off. You also have to be sure you have genuine plugs. The half-priced ones on Amazon and eBay are pretty much guaranteed to be low-quality counterfeits. Best case is they work fine but wear out really quickly. Worst case is they fall apart inside the combustion chamber and destroy your engine.

 

[JPVortex]

They should've come already gapped properly. Are they iriium or platinum? You have to be VERY careful when measuring and adjusting the gap. That tiny electrode tip can be easily be broken off. You also have to be sure you have genuine plugs. The half-priced ones on Amazon and eBay are pretty much guaranteed to be low-quality counterfeits. Best case is they work fine but wear out really quickly. Worst case is they fall apart inside the combustion chamber and destroy your engine.

I got copper ACDelcos from rockauto, the gap was way off when I got them. But I'm wondering if I gapped them too far.

 

[JPVortex]

Update, cleaned throttle body and it's running the same except with a small vacuum leak coming back to idle from revving because one of the throttle body studs broke.

Its idling at 490-500rpm, feels low to me and I'm wondering that's why its stumbling, because when I forgot a vacuum hose it was at 750rpm and it sounded much smoother. Just dont know why its idling low

 

[Fless]

I have to think that cleaning that throttle body would do nothing but improve things.

 

[iamdub]

I got copper ACDelcos from rockauto, the gap was way off when I got them. But I'm wondering if I gapped them too far.

Ah. Cool. Wouldn't hurt to double check.

 

[TollKeeper]

@TollKeeper
Sprayed around intake ports and vacuum lines that I could see(could only see a couple) nothing happened to the idle. I forgot to do the throttle body gasket but Im going to replace while the body is off anyways. The hiss is definitely coming from the drivers side.

@mattbta Will def look into that, thanks!


@Fless Def a really good idea lol.


Here is a video of the idle without belt on

Some of the noise is also the muffler delete, which I'm going to be putting a muffler on soon.

Here is a picture of the throttle body. Will definitely be cleaning this very well, its nasty.

If none of this stuff helps I'm going to try regapping the plugs.
View attachment 389096

Drivers side of the engine? There's only 2 things that could cause a vacuum leak, the pcv line from the valve cover to plenum, and the 4 intake ports. At least that's all I can think of.

 

[JPVortex]

Drivers side of the engine? There's only 2 things that could cause a vacuum leak, the pcv line from the valve cover to plenum, and the 4 intake ports. At least that's all I can think of.

Definitely the intake ports then, took the PCV line off and its fine. What about on the passenger side? I know the EVAP Purge solenoid can cause a vacuum leak too. But my fuel trims seem good so it must not be a huge leak.

 

[JPVortex]

But coincidentally while still a low lean, the drivers side(bank 1) is still higher than the passenger side at 0.0% ST and LT, its got me thinking a small vacuum leak.

 

[EddieC]

I have had new and old Chevy engines since the mid 60's. They tick and keep on running. Our '08 clicks until warmed up.
Worst case was a solid lifter engine with .030" valve clearance. That clatter makes you ignore just about all other engine clicks.

 

[JPVortex]

So today I was going to remove the plugs and I wanted to pull the dipstick tube out, bit the bracket broke. But I still got the tube out with a struggle. However now without the bracket with it back in its loose, I think its fully seated. With it moving like this will I be able to get an accurate level reading or should I get a new tube?
Video :