I have a 95 4x4 5.9 single cab short bed and it stalls out some times when its in gear or comming to a stop sign or turning corners. I had a shop scan it and no codes.(go figure) i had replaced about every thing on the throttle body and no love. It has about 104k on it. some ppl say its my map sensor and i say its something else. Has anyone ever had this problem before? I think that it might have something to do with the fuel pump or injectors. But i dont want to waste my time or money is thats not the problem. while sitting in park a few weeks ago there was a surge in the idle so i had replaced the iac motor, that stop the surge at idle but still stalls out when im in a parking lot going from reverse to drive. Any help on this would be help full. Thanks Gregg@netgearhead.com

I'm new here but to me that seems like it isn't a sensor issue. I know on most types of cars if a sensor is defunct the ECM/PCM will go into a fail safe mode and the SES light will illuminate. It sounds to me like you might have a vacuum leak someplace. I would get a vacuum tester and see if all your vacuum lines are good ect ect. I would also check around the TB and make sure that you don't have a messed up gasket there. Spray some WD40 or carb cleaner down there while the motor is running. If it takes off and races you have found your problem.

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2001 QCSB 4x4 Sport 5.9.

I finally found out what my problem was. It was the IAC motor. I had put a new on in but i had some buddies rushing me to get it done so i didnt clean the hole on the back of the TB. Finally after a few days if getting fed up with it i was going to replace every thing on the TB and when i went to napa I opened the hood to find out that i don't think that i ever pluged the IAC motor in after cleaning the hole out. So i held off spending $200 in parts, drove her down the road a lil bit and shes been fine ever since.