My car wont pass 4500rpm

[fantompr]

hi

The new problem of my car is wont pass of 4500rpm like limiting (runing)
stop in neutral shift, limit in 4000rpm and i saw the car pull a lot of boost
like the antilag wich i have disable.

i checked the park plug and installed new ngk bpr6es gaped to 24 and still
the problem

Any help is welcome
Thanks

 

[r18eclipse]

Something may have disconnected...Check under the hood: maf connection, ignitor( transistor).

Look around under the hood and make sure everything is connected for starters..

 

[rEclipserGST]

hi

The new problem of my car is wont pass of 4500rpm like limiting (runing)
stop in neutral shift, limit in 4000rpm and i saw the car pull a lot of boost
like the antilag wich i have disable.

i checked the park plug and installed new ngk bpr6es gaped to 24 and still
the problem

Any help is welcome
Thanks

Limiting... is it:

Studdering?
Bucking?
Not accelerating?
Fuel cut feeling?

I'm having a slight bucking problem. I wanna blame it on the fact that i have a few too many mods & no tune

 

[4g63monster]

this happened to me last year turned out to be the plug wires

 

[brandon1239]

ecu is my bet. mine did the same thing at 3000rpm. does it spit a lot of black smoke out when its acting like its antilagging? my ecu was junk and caused a super rich condition that would literally make it 2step. i could build 15psi of boost when it did it haha.

 

[RadDsm]

Does that only happen when you aren't driving?

Maybe you have your 2 step enabled?

 

[donniekak]

Check to make sure your clutch switches are connected properly and the speedometer works.

 

[r18eclipse]

Limiting... is it:

Studdering?
Bucking?
Not accelerating?
Fuel cut feeling?

I'm having a slight bucking problem. I wanna blame it on the fact that i have a few too many mods & no tune

after checking connections... just like this post states. may need a tune.. is it tuned by a pro?

 

[pj91gsx]

mine did the same thing. the speedometer cable wasnt connected and caused it think i was at 0 mph and ready to launch.

 

[fantompr]

all the plugs are well conected (power transistor maf)

and the problem is when im driving
when im stop (neutro) the car start the problem 500rpm early.

I try to pass the 4500 and the unique way is running in vacuum and anyway start slowly the problem
like stoping and explosion exhaust (sound)

My car is tuned by a pro for 18psi and i drop the boost to 12psi thinking of if i droop the boost i can
fixed the problem but no still that.

Sorry for my bad inglish i dont speak inglish and thanks.

ecu is my bet. mine did the same thing at 3000rpm. does it spit a lot of black smoke out when its acting like its antilagging? my ecu was junk and caused a super rich condition that would literally make it 2step. i could build 15psi of boost when it did it haha.

Someting like that but running and stop

My mechanic think can be the ecu.
But im checking other alternative

Check to make sure your clutch switches are connected properly and the speedometer works.

yes all is good the car was working good until start the problem
like 2 month. i miss touch the redline

 

[brandon1239]

yea sometimes my car would be fine and run normal. others like complete crap and it was the ecu.

 

[fantompr]

i will try this week power transistor maf and sparplug wires

 

[snowborder714]

Can you grab a log and post it up? That might help us diagnose the problem.

 

[fantompr]

^^^let my try to do that soon

because i dont have laptop but let me see what i can do to post a log