Death rattle

I presume toyota won’t cover HG’s?

 

If they do, we’d have pigs flying all over

 

I sold it to my grandson. It will never sit long enough to collect what ever gaseous evil is causing this. Plus his dad and and I have the skills to R&R an engine or fix the HG should that ever happen. it is not leaking coolant at all and the death rattle only happens after sitting idle in cold weather in my garage.
I have found “push button, floor accelerator to start” seems to avoid it.
Personally, I suspect the vacuum at start liquifies gasses that temporarily foul the plugs much like a “dew point” with water, except caused by the pressure drop under vacuum. I’ll leave the rest to the physics majors!

 

Need a bit more back story. What the miles, symptoms?

 

It's blow-by condensed in the intake. An oil catch can will fix this.

 

Illegal in California. But there is a long interval between smog tests like four years or something. I’ll bet a splice so you could remove it would cause you to flunk.

 

Less than 90,000. I did a EGR cleaning out per instructions here @ PC. It only happens during a two or three day cold soak. But “forced start” is helpful. (Start button, floor gas pedal when dash icons appear). Not losing water.

 

In formation!

 

Ask them for a three year 50,000 mile warranty.
if your head gasket isn’t leaking why burn the money.
I hear talk of getting used engines, but really. How good are they? Good enough for a 50k and 3 year?
Toyota built a bad engine and they know it, yet AFAIK it has been one patch on top of another.

Oh well. I must be grouchy today..

 

Uh... a (partial) vacuum would tend to encourage evaporation of liquids, not condensation of gasses into liquid.

 

If the gas was saturated, wouldn’t liquids precipitate like dew?
Which makes me wonder if anyone has tested removing the air intake to the manifold for test purposes. Thus introducing air into the throttle body known to be “clean” air.
Lastly, starting by immediate 100% gas pedal seems to help.
Standardized testing would help.

 

Liquid would precipitate if you cool your saturated gas (example: dew forming), or compress it (example: condensate collecting in a compressed-air system). Water can certainly be condensed by cooling exhaust gas or cooling the PCV mixture of gases, both of which inevitably include a healthy dose of water vapor.
The last time I got an alarmingly rough start (which wasn't recently), I tried depressing the accelerator, and couldn't tell it helped at all.

 

Never seen somebody put putty in an EGR valve before

 

It's been cleared up, a putty knife to block the EGR path, no putty involved.

Posted via the PriusChat mobile app.

 

Hi mendel I have a 2013 prius 172,000 miles on it I have a rattle on cold start up and coolant loss no white smoke or cross contaminated oil. I can step on the acceleration when start to make the rattle go away. I'm not sure what the problem is. It just recently started doing this about 2 months ago. I just started working so I haven't been able to test much with what could be wrong. I've tried removing the o.ring to the radiator cap and it helped but with the o ring on the cap it was doing the rattle when I would come to stop signs and red lights after I took the o ring off it only does it upon cold start up. It's my only vehicle and until I get money rolling in there isn't much I can do. My hv battery has also went out where my car just constantly runs without going into ice mode. I have misfire in cylinder 1 and changed all spark plugs and cylinder 1 ignition coil. Still have misfire. I'm starting to believe it's a small head gasket leak. I just don't understand what else it could be.. any ideas?

 

Do you have a 2013 Prius OR a 2013 Prius c? Your profile says that you have a 2013 Prius c. These two cars have completely different engines.

I see that you created a new thread in the Prius c forum, and you say that you have a 2013 Prius c. https://priuschat.com/index.php?posts/3491624