Hi all, new to the forums. I have a 1994 silverado 2WD. Motor is essentially stock. Now, about a week ago my heater core decided to start peeing on my passenger..... So I went ahead and replaced the heater core. after getting everything all buttoned up, I pulled her out of the garage and let her warm up a bit before I headed home. Upon getting in the truck to leave, it was apparent to me that someone traded out my beautiful silverado for a PMS-ing, coked out, hog. From a stop when accelerating normally, she started bucking like it wasn't getting fuel. After 15 or so minutes of crude profanity, I started looking around, all looked well, no sensors unplugged. so I tried running her with the MAP unhooked, and it seemed to clear up the problem ( besides the fact that the rich exhaust could euthanize a small village) So do you guys think the MAP sensors is the ***** thats ruining my mood, or maybe another problem? Any help is greatly appreciated

 

how about the vac line to the map is it broken/pinched?

 

Nope, I even replaced it to be on the safe side.

 

Any check engine codes or lights flashing?

 

Well, with the MAP sensor plugged in, it isn't throwing any codes, but bucking like a ****, but with the MAP sensor unhooked, it makes it throw an SES, and makes it run rich but clears up the bucking.

 

pull the codes(even with the ses light off you still have stored codes)..this will shed LOTS of light on the situation.....and let us know what you find out