my 1jz cuts out at 120mph??

[Dan Swanson]

I would guess your car has a builtin rev limiter to keep you from blowing your engine.

I own an "87 MKIII n/a. I have driven fast and have the tickets to prove it. As a teenager I lived a relatively small town I did some some street drag racing. But, for your safety and the safety of others I suggest that you do not race on the street unless you want to go to jail after killing some one.

In Florida it is against the law to spin your tires on the road. A mandatory appearance before the judge. I do not know what the penalty would be.

Good luck and be safe,

Dan Swanson

Originally Posted by JZA70dood

okay, ive had no problems out of my car untill now..
i was on the interstate the other day and i was runnin a new mugen si civic..
and i slammed into 4th @ around 80mph then drove it uyp to 120mph and it just cut out so i switched to 5th and got to 135mph and it cut out again..?
so i just let out and let it get down to around 70mph and it was fine..
no noises or anything crazy..
but i was a little low on fuel so i just figured that was the cause so i didnt think much about it cause it seemed to doing fine..
so a few days later i was on the interstate headed to work and a 350z pulled up next to me so i just kept it in 5th and got on it and once again i hit 120mph and it cut out..
this time i had fuel and i wasnt even gettin into it..
i have no clue to what would cause this..?
it doesnt smoke when it happens or anything..
it just cuts out..
can anyone help???
thnx

[kwnate]

Speed cut, I have a mines ecu so I don't have that problem. I'd look into an aftermarket ecu or a speed cut defencer. I thought I read somewhere that you could cut a wire and eliminate it as well but I don't know for sure.

[JZA70dood]

hey thnx kwnate.
that sounds like something that would cause the problem..
good thing i havent invested in a 6 speed..haha
id never get to use it..