Having trouble starting with warm engine. Proabably the engine coolant sensor. Waiting for next paycheck to replace it.

 

However, I also have sympton of car idling high (2000 rpm or so) when I pull up to stoplight after downshifting into 2nd. Idle returns back to normal after a second of too.

 

Could this be from the bad engine coolant temp sensor or does that only affect fuel mix when starting?

This sensor can make the car do odd things. Attack one problem at a time. Replace the sensor then pull the codes and let us know what they are.

 

nipper

First check to make sure it is connected at all.

 

I completely forgot about this connection when I put my rebuilt motor in. I bought a code reader to figure out why the check engine light was on. Had I remembered to connect it in the first place (it was the only missed wire in the entire job), I wouldn't have needed the reader.....but it is a nice-to-have!

 

Oh, and the easiest way to tell thing is is acting up is if your electric fans kick on immediately when you start the car.

Lemme double check tomorrow when I get to work, but you won't need to put aside a whole paycheck for it. The sensor's only $25 or something like that, and it's easy to replace.