I need some serious help please! 3vze chattering at idle. WTH!!

[PowellSixO]

I just got done dumping way way way too much $$$ in this turd bucket. And out of no where, it started running rough, and doing this weird chattering deal at idle. Any ideas or help please. I'm about to put a road flare in the back seat, with a full tank of gas. It ran great for a few weeks, then started having transmission shifting issues, so I had the solenoids replaced and a fluid flush. That did not fix the transmission. The transmission shop ended up putting a tps sensor in, which did fix the shifting issues. It ran great for a day then started ticking when driving. I haven't driven it more than a few hundred feet since the ticking starting. Now at idle it ticks as you can hear in this video, and the throttle body chatters. I tore both valve covers off to check valve clearances, thinking it was a valve train issue. All the clearances were perfect. What the hell? Haha.

YouTube


Recently done:
Heads rebuilt
Valves shimmed
Water pump
Timing set
AC compressor
Power steering pump
Head gaskets
Injectors
Knock Sensor
Rotor Cap Wires and Plugs
$2k worth of front suspension parts
Tires
Brakes
Transmission solenoids and fluid flush
Radiator
Hoses
TPS sensor
Air filter
And a bunch of other stuff I am surely forgetting

 

[PowellSixO]

Could this be rod knock possibly?

 

[PowellSixO]

I'm going to do a compression test on it this weekend. I'm starting to think I have a burnt valve. I guess I should have gone with a pair of new heads, instead of having the old ones rebuilt.

 

[PowellSixO]

The reason I'm suspecting a burnt valve, is because of the throttle body chatter. Something is possibly pressurizing the intake. Which leads me to believe an intake valve. When I had the heads rebuilt, they only replaced one valve. The one they replaced is the intake valve on cylinder number 1. Using a stethoscope, I have tracked the noise down to the valve train on cylinder number one. Yay. I'll let you guys know.

 

[ivbyiv]

Any updates?hone:

 

[Jimmy Two Dogs]

I'd love to see some photos of the "turd bucket". :banana:

 

[PowellSixO]

No updates on the Yota yet. Been busy. Going to try and get in there this weekend.

 

[Clockworkmotors714]

Does not sound like a rod knock. Sounds like your standard valve train chatter. Can you record a video of the noise when you rev up the engine.
A lot of people are not familiar the type of shims required to adjust the lash on these engines. I’ve dealt with plenty of 3vzes that have been “repaired incorrectly”.
When I bought my 4Runner it always had a valve train tick and lacked power. When I rebuilt it and went through the cylinder heads, the lash was wayyyyyy off. I was surprised it could even run with the amount of lash it had.
Ask him how he adjusted the valve lash.

Also to determine a burnt valve you can perform a cylinder head leak down test. If you are unfamiliar with this. YouTube it and you’ll find a break down of what to do and how to verify a burnt valve concern.

 

[Hyde802]

Did you check for check engine codes? Even if the light isnt on their may be a code.

 

[RonJR]

I agree, doesn't sound like a rod knock - too "light" of a sound for that. Don't rule out an exhaust leak at the manifold. I've had those sound like something mechanically ticking, but it's the hot gases popping out of a small leak.

Get a piece of 3 foot hose and do some listening. Keep it and your hands away from the fan belt.

 

[Clockworkmotors714]

I would say pull a valve cover off, but they are a nightmare on these engines...