Intake manifold, EGR vlv & exchanger replaced

Post replacing these 3 parts to fix the rattle sounds, I am still having issues on startup.

Its still in the garage bay. I just finished last night, checked all my sensor connectors, etc. I don't get any maint code lights. I smell a lot of fuel and there is quite a rattle noise yet. It smooths out and then comes back, then idles super rough. I shut it down and brought it back online several times to see if it would clean up but it didnt.

Racking my brain trying to imagine what I missed...

Thanks in advance for any insight. Brad

 

180K miles.

Update: I failed to reconnect the U shaped Biggish line from the bottom of the intake. I thought I was home free. So I used some MAF cleaner on the MAF sensor. Cleaned all of my elec connections for good measure and blew them out. Buttoned it all up and it still has the rattle sound but it is far improved from the previous startup.

Feeling a bit defeated on this one. Considering taking it into Toyota to see what they say. But no codes or dash lights at all.

 

I will monitor my coolant.

I am going to change my plugs as well. if one of them is cleaner than the others I suppose a HG is likely.

Thanks!

 

Changed my plugs and all 4 had a decent looking color. None of them were washed either, so Id have to rule out the head gasket bothering the cyl fire to disrupt idle. Or am I missing something?

I notice when the engine is finishing its cycle going back to battery the noise stops while the engine is running for about 10 seconds before the shutdown to battery.

The noise is not the pronounced knock. It is more of a rattle that sounds like a loose heat shield on a converter or something.