Hi Guys
I have been through some of the threads on here about other having the same problems as I'am having with stalling but anything I have found it doesnt seem anyone has found the problem. So heres mine.

The truck runs Great idles fine new plugs wires yada yada I have had it scanned everything is fine. However when it warms up and I come to a stop or put it in drive or reverse it stalls no sputter fart or bang just like I turned the key off. I follwed other thread suggestions cleaned the throttle body checked for vaccum leaks. The only thing I found is in another thread is the Temp sensor controls the PCM for fuel and air somehow.

Any help would be great I'm gettin a little tried of stopping and always putting the truck in neutral.

Cheers
Matt

 

Crank Position Sensor

 

Can you detect the torque converter clutch engaging/disengaging properly as you drive?

 

No
That was my next question, everything shifts fine

 

Does the 97 hava a cam sensor?
Would the temp sensor also cause this affecting air and fuel with the pcm?

 

try this test. drive with both feet, and keep light pressure on the gas pedal when stopping. just enough to get your rpm up off idle to about 1000 rpm. if it continues to run ok while doing this, then i'd replace the TPS.

 

I think this is going to be my next step, I am driving this way now. But does the temp sensor affect the pcm at all like I read elsewhere this doesnt happen when it is cold only after it reaches operating temp

 

there are 2 temp sensors - Coolant temp sensor, and Intake Air Temp IAT sensor. both are used by the pcm.

without an expensive scanner to monitor the pcm/sensor data stream, its sort of a guessing game here. also, as you already know, the pcm operates the engine differently when cold vs warm, and then there's also the open loop/closed loop stuff.

since yours runs good when cold, its leading me to believe the IAC is operating properly. if it is, it'll cold idle at about 1000 rpm and slowly drop down as engine warms up to about 600 rpm at normal temp.

what i suspect your is doing, is when you come to a stop, your TPS is not dropping all the way down to idle voltage, leading the pcm to think your still mashing the gas, so its not turning over idle responsibility to the IAC. so when your foot comes off the gas, and the throttle plate closes - if the IAC doesn't take over, then your engine dies from lack of air.

this is just a guess. i'd replace TPS first. if that doesn't fix it, replace IAC next. if that doesn't fix it, then i'd sniff the exhaust for rich condition, and maybe replace front O2 next.

keep all old parts until proven bad. if they turn out to be good, then you can keep them as spares and reuse them on the next problem.