Wont run under 3500 can anyone help?
 

i got a 1987 13b i put new pump filter and tank in it then it stopped running. it will only run IF you can get it above 3500 rpm. A guy that teaches at my college builds rotaries for a side job and says primary injectors wat do u guys think?

No one responded and its probably due to lack of information you supplied. From what you have said, it sounds like it could be one of two things. Thing 1) Check the AFM connection and the AFM itself, and Thing 2) You may have a significant vacuum leak. Check for cracked or missing vacuum lines and the gaskets at UIM and LIM.

sry for the lack of info but i know nothin about these cars especially wat those abreviations of yurs are the only details i have r wen i got the car it had sat for ten years in a garage and needed a pump i put one in it ran awesome then it started boggin after it ran for and hour or so the tank was deteriarating from the inside out i cleaned it it ran good for about a month then did the same thin i replaced the tank and strainer and filter agian then after 5 minutes it just didnt want to run i git it home then tried startin it and it fire just not stay up n runnin but if i could by chance get it above 3500 n keep it there it would stay runnin but the instant it got below that it would die i talked to a guy who builds these motors and said its probly the primary injectors any ideas? does this sound like that could be them??

Vacuum leak. Go through your vacuum lines.