Joshboody

Loud clicking noise on cold start... not consistent and not with rpm and goes away after about a minute. Looking around could not see anything obvious. Afterwards I considered something pertaining to the throttle body/plate. Next time it happens I will focus in this area.

Anyone ever experience clicking from the TB?

It drives fine. Most times I cold start I use the flood feature to crank for about 10sec to prime oil cooler.

2001 coupe

CactusCat

From the TB? Maybe, but not likely. The only thing I could think of on the TB that would make any noise would be if the throttle plate screws were loose but that would probably make noise all the time. I would lean towards valve train noise that goes away after the car warms up or maybe possibly something in the belt/pulley area. GL with your search. Keep us posted. Maybe take a video so we could hear it????

foggy

Probably a lifter making noise. Esp on a cold start, then goes away.
You are prob just hearing it reverberate in that area

Joshboody

Yeah, seems unlikely... just checking. I do have valvetrain noises, but this is very different and loud, like something's stuck in the fans (but there's not). I'll pull the VCs soon and wiggle stuff.

Brackets

It is possible that it could be the TB. Next time you hear it just grab the TB motor on the side. You'll know right away if that's it.

Joshboody

Seems its coming from the compressor with AC on. I just did one of those recharge can thingys and noise showed up after. It goes away after about a min and not constant within that min... so we won't worry until AC goes out again

Bill Curlee

LOL!! Put a gage on the suction side of the system and observe the suction side pressure when the noise happens. If you have an overcharge condition, the compressor can make a clicking noise. Especially on first start up! The suction side will oscillate with the noise.

Joshboody

Thanks Bill!
By suction side, if you mean low pressure... I was still way low (according to the can gauge) after emptying the can. Around 30-ish psi at 110deg ambient, which called for like 45psi min.

I can reuse that gauge and if high, guess I just relieve pressure through the low pressure schrader valve?

Bill Curlee

Suction = Low Side

If you were around 30, it could be the compressor CLUTCH cycling due to the pressure being very very close to the low pressure cutout spec. When you hear the noise, see what the compressor clutch is doing.

Bill.

Joshboody

Ok, so likely need to add refrigerant. I added a 20oz can and doing a quick search seems system prob holds closer to 30oz.