greg90gs
10+ Year Contributor
- 147
- 1
- Jun 1, 2009
-
des moines,
Iowa
ok guys my buddy just bought a 1g 4g63 nt and the guy said it runs fine till warmed up and loses power but while driving it home we found that the car wont go past 300 rpm it runs fine and it will still pick up speed as far as we can take it as long as we shift before 3000 rpm any ideas on what this could be, it is all stock but the guy for some reason put in a wally 255, could this be the cause, he also said he replaced the maf