Slight surge and new tps issue
 

Ok I've searched several times and could not find any solutions similar to what I'm having with my 95 w vin blazer. Ok I bought the vehicle a couple months ago knowing it has a slight surge while driving at constant highway speeds. Then when the ac was on it was more pronounced. Now the ac on max air blows through the defrost and floor while accelerating. I checked the tranny fluid put in about a pint to top it off a running temp. So I buy a new tps put it on drive it 1/2 a mile then it dies at a light. I have a check engine light light it shifts maybe 1k rpm past where it should. I take it back to the parts house and they are unable to get any connection. Send me a mile to different store same problem can not connect. Put the old tps on it starts runs like it did before. What the heck? They just give me my $ back and said take it to the dealer.

Ps it did get hard to start when cold crank it a 1/2 second then try again it would start right up.

Did I miss a thread or can anyone help? Thanks and love this site