Cold clicking

Why does my Toyota Sienna ('03) click/ping until the engine warms up after a cold start and driving about a mile?



It only does this after first cold start of the day. Later in the day on a cold start, there’s no clicking engine noise.



The sound is like pinging you might hear when lugging a hot engine. It doesn’t click until the revs are around 3000rpm and the transmission hasn’t upshifted from 2nd gear.

I HAD AN 88 CAMERY THAT DID THE SAME THING.THEY SAID IT IS NORMAL FOR A TOYOTA.MUST BE THE LIFTERS PUMING UP OR SOMETHING…LOL

IF IT HAS AN EGR VALVE YOU MIGHT CHECK IT OUT.SOMETIMES THAT BUILD CARBON UP INSIDE THE BLOCKING THE AIR FLOW…JUST AN IDEA FOR YOU.