Engine stalls on first start

No worries
Most manufacturers do have a key on prime (many direct injection vehicles run a prime when the drivers door is opened as well) but 1st and 2nd gen Tacoma's do not, I do not know about 3rd gens.

 

Heh that makes sense, I've been disconnecting the battery most days to charge it at work because I believe I have a bad alternator, I'm at work right now when I'm not busy I'll check if that's what is happening

 

Yeah it was me disconnecting the battery that caused the stalls lol. I disconnected it for 5 min and stalled on first start, so it's good to know I don't actually have big issues going on, thanks

 

The first time I changed my spark plugs, I disconnected the battery. When I hooked it back up and started it, it immediately shut off. I was convinced for a few seconds that I had done something terribly wrong during the process of changing the plugs. Lol

 

All Toyotas as far as I have seen do this when you disconnect the battery.

 

Many vehicles will because disconnecting the battery on most vehicles resets all the learned values in the PCM (idle airflow compensation, throttle trim, fuel trims, etc...), if the throttle body is dirty it will take it even longer to relearn it's base idle.

 

This

When carbon builds up in the throttle bore, the pcm adjusts the throttle plate to open more and more over time and sustain an idle. When the battery gets disconnected the "learned" position is forgotten. The throttle plate goes back to default position, buried down in the "mud". Not enough air flows to allow idle so it stalls on the 1st attempt. By the next try (key cycle) the plate has adjusted open enough to idle.

Subarus are terrible for this. Oftentimes I'd replace a battery and then have to pull the air cleaner and clean the TB so it wouldn't stall at the first stoplight you come to.

 

I've seen this happen even if the throttle body is new or clean of any mud after disconnecting the battery so I don't think that is the reason why they stall on first start after reconnecting the battery.

 

Much like everyone else. My 14 v6 does this whenever I disconnect the battery cables. My moms v6 rav4 also does this. My friend is a toyota/lexus tech and told me they just do that. Freaked me out the first time for sure

 

The point is the TB has to relearn. Relearn is easier on a clean TB

 

No it's not but a dirty throttle body can cause low idle/stalling after a battery disconnect until it relearns idle airflow trim, Toyota's will not begin learning idle trim until the coolant temp reaches about 176F.

 

Sometimes a weak battery will drop low enough during cranking to wipe out the memory, even if the engine eventually starts and runs.

That's why I mentioned checking the battery too

 

You guys have me worried.
I’ve disconnected my battery quite a few times. (Just 2 days ago)
Some times for a couple hours. Never had mine start up and shut off.

BUT……..the AC didn’t want to work after I hooked it back up. It took turning it off an on a few times to get it to work.

I don’t know if you he battery had anything to do with it? I honestly haven’t had the AC On until today. Other than when it comes on with defrost. And I never checked it.

Basically, I haven’t checked it for “cold” since last summer.