97 Tahoe Hesitates

[97Tahoe]

Hi all,

I have a 97 Tahoe that has run perfect up until recently.

In the morning when the Tahoe is cold while driving it stutters badly.
It only does this while maintaining speed or accelerating lightly. It idles fine and if I punch it, it stops doing the stuttering. As soon as I drop back down to maintaining or lightly accelerating it stutters and almost sounds like it is trying to backfire. I can hear sputtering coming from the tail pipe.

After about 5 miles it smooths out. I can still feel some hesitation but no where near as bad.

I have given the Tahoe a tune up. I checked and cleaned the MAF.

I don't know what else to do and am looking for more suggestions.

Thanks in advance.

 

[gpracer1]

Possible coolant temp sensor.

 

[97Tahoe]

Coolant temp sensor? Hadn't thought of that. I'll check into it.

 

[Donnie Yukonie]

could be your spider, the OE plastic ones tended to melt and cause problems they have a new design that is metal

 

[gpracer1]

Coolant temp sensor? Hadn't thought of that. I'll check into it.

And I mean the one that is in the thermostat housing that feeds the PCM ......not the one on the head that feed the gauge.