1999 Stalling Problem when hot

[caddman6425]

Hi Guys and Gals,

I've read a lot on the problem that I'm having, but every post just doesn't quite totally represent what I'm going through. Even thought they are very close and say the same thing that I was thinking, I thought that I'd state my case and see what bites.

My problem: I have a 1999 Bonneville SE 3.8 L, Automatic Trans, Air Conditioning, when I start in the morning when it's cold, I have no problem. BUT..., when it reaches operating temperature, and I start it, it will stall unless I have the throttle depressed, and it doesn't throw a code!

Off the top of my head I come up with IAC, TPS, CPS, my problem is the no DTC, what are your thoughts on the subject? Maybe I missed a thread that has the same info I'm looking for and some direction to it would be great.

TIA
--
Nick

[JimzSSEI]

Old school thinking says that a failing ignition control module, under the coils, causes stalling, hard starts when it's heated up.

[caddman6425]

Oh, I forgot about that, how can I check it?
--
Nick

[SSEBonne4evr]

Lot of good info to try in this post.

http://www.pontiacbonnevilleclub.com/fo ... 43770.html

[inition]

Sounds like the coolant sensor.