Yaris starts then it wont start.

[slow.yaris]

Wouldn't fuel pump, spark plugs, sensors all throw a code? I would check for codes even if its not showing up, the LED could be bad, or previous owner could have taken it out.

I understand the warming and cooling down thing, but I think it would be really weird to have a fuel pump or spark plugs that won't START when warm, but give you no trouble when driving around - while warm.

Ignition coils is my guess, but I also agree, take it to a mechanic before you start changing random parts.

[Happy Little Pony]

Originally Posted by slow.yaris

Wouldn't fuel pump, spark plugs, sensors all throw a code? I would check for codes even if its not showing up, the LED could be bad, or previous owner could have taken it out.

I understand the warming and cooling down thing, but I think it would be really weird to have a fuel pump or spark plugs that won't START when warm, but give you no trouble when driving around - while warm.

Ignition coils is my guess, but I also agree, take it to a mechanic before you start changing random parts.

My gut makes me think it might be something like the fuel pump relay.

We've had several Fords in the family over the years and in the eighties they were notorious for having a little ignition module doo-dad that, when they started to fail, wouldn't start when hot. I'm pretty sure that "ignition module doo-dad" is the correct technical term, although it might have been "that thingamabob that's hooked onto the distributor."