power tops out at 4.5k rpm ?????

[billy hoang]

hey wassup nicoclub ..... finally got a chance to join the forums after purchasing a 1995 s14 .

my question is ..... every gear that i drive in , everytime the rpm climbs to 4.5k , it sounds and feels like its at its peak .

like it reaches 4.5k and cant accelerate no more .

is that the normal shift point for 240s ?

or is there something faulty ?

hope i can get it fixed .

also , what spark plug wires should i use ? thanks

---billy

[rotorimp]

Will it not go past 5k? may have a MAF problem.

[billy hoang]

i'm pretty sure it wont go past 5k .... cause i dont even try cause it feels like its having a hard time to get to that point ....

so if its a MAF problem .... i would need to replace the MAF sensor ??

thanks for your input so far .

on another forum ( Z ilvia.com ) ... they said to check for a vacuum leak ??

[180fan]

if your idle is unstable it could be a vac leak. usually if it's a mafs problem it'll be at 2500 but I've seen the mafs act stupid and cause that 2500 to be other places. any other problems that could give us a better idea of what's going on?

[epoch707]

check your fuel filter, it might need to be replaced

[billy hoang]

the idle is fine .

i just recently replaced the fuel filter with a genuine NISSAN fuel filter .

i tried pulling the 5th gear position sensor , it still rev limits at 4.5k

i tried pulling 4th & 5th gear position sensor , it still rev limits at 4.5k

i tried disconnecting the battery and holding the brake pedal down for a minute and pump it ..... still rev limits at 4.5k

any other ideas guys ?

[s14_240sx]

what about if your in neutral and revving? still 4.5k? does the engine sounds match the rpms? Maybe your tach is just off?

[billy hoang]

is there anyway i can test the tach ?

replacing with another tach and check ?

[nightkid86]

what about in neutral

could be transmission related possibly. BTW, it's not like our cars do great above 4.5k rpm, yay low end torque.

[iseenem240SX]

I have the same problem in my 98 Kouki, the engine just screams at about the same RPM. It hasn't been a big issue for me, at least she runs. If you figure it out let me know.

[Afliction523]

my 93 feels the same way. The auto transmission in it before slipped, so i never could tell the difference since i wasnt really going anywhere fast. Since I did my 5 speed swap, it seems like it does top out around there.

[billy hoang]

we should all sign a petition so nissan can fix it .......... but for the meantime ... does anyone have the fix for this ? please ???????????