I have an 89' rx7 s5. I recently had my motor rebuilt with a small streetport. The last week or two... It's developed a problem which has gotten worse. Between 1 and 4 grand... it has a studdering problem. Like a fuel shortage... but it runs rich. I just changed the spark plugs... could this be my fuel injectors? Any input is greatly appreciated.

 

have you replaced the fuel filter,get injecters looked at,fuel pump,dyno tune it,you dont want it going pop.

 

New fuel filter... the injectors are from another 7 that didn't look all that good. So I think that might be the problem.... could it be the fuel pump though?

 

If it was a fuel pump problem it would start to choke out at higher rpms, but your problem is between 1-4k rpms. I runs fine over 4k, right?

 

Yeah... sort of... It was kind of doing it today at like 6 grand