Celica Forums General Discussion General Rev limiter on 2001 Celica GT

Why does it have a REV limiter? and is there anyway to disable it? It's very annoying...

It has one to prevent distruction of your engine. To disable it, you would need to reprogram your ECU, or buy a stand alone one.

there are crystals within ur ecu, that you have to change

How do you reprogram your ECU?

Crystals? How the heck do you change that????

That's how you do it with the 02 GTS, so it is probably the same for the GT. You really have to know your shit to pull that off.

Is there an easy fix? Cause now I just feel totally lost

the crystals in the ecu you want to change from 16- 18 or something not exactly sure, but since you say ur completely lost dont go this route just save up some cash and get a powerFC

I would love to get a powerFC, but they cost a fortune! What do you mean by crystals?

ok you want to change the krystal to 18khz from 16khz (picture from c2gas)

So, you melt the two 16khz krystals off and soder the new 18khz krystals on, correct?

yea, but if you do this be careful you dont want to blow ur engine the rev limiter is on there for a reason *this will remove ur limiter*

I'm aware, hehe. 2 more questions... Where do you buy these crystals at? and, where is the circuit board (from pic) located at?

its in ur ecu, not sure where you can buy them

Okay, thanks for your much appreciated help

Is there more pictures of the ECU or is that the only one?
What source are you getting this from?

that picture i got off the other site that is the only pic pm c2gas he prolly knows more than me about it since he did it to his car

Thanks man, you've been a big help.

sweet...info..

does that work for a 03GT?

I'm not sure

If I were you, I would buy one from a scrap yard & modify it. They are about $150. If you screw your original, you will regret it.

yes it does...but if you rev much past 7,000 rpm on a stock head GT (of any year) you will bend valves and have serious nastiness...you need the MWR valves and valve springs...even though I built my engine with stronger parts, I'm still not going to try this...no point unless you have a pfc to advance the VVTI and actually get some sort of power past 6800 rpm...and you can get the crystals at any electroinics store (by electronics store I mean electronic parts store) maybe even radioshak...but I doubt it...it should take you 30 minutes if that, and about $2.00 for the crystals

So, it's pointless to "up" your REV limiter?

unless you build your engine and get an apexi pfc to tune it...or get a Turbo and put in stronger valves and valve springs so your valves don't walk all over the place...the Turbo may make power past 7000 rpm...but that's a different ball park of money we are talking about

yah you can get rid of it by removing a crystal on your ecu. but by doing so you risk premature engine failure. due primarily to belt valve stems. i would suggest not to remove it, considering mimimal gains anyways, especially for a gt. and one other thing just one bad downshift and your jacked

Sounds like more of a hassel than for good, thanks guys for the info

Th rev limiter doesn't prevent you from mis shifting, if you do that, it won't matter if the ECU can fuel cut or not.

The other thing is that the 1zz mkaes the most power at about 6700-6800 RPM (that's 100 rpm before the redline), so increasing it won't do anything but lead to problems.

It does serve a purpose and it is there for a reason.

Primary belt valve stems?

has there been any success on the 02 gts ecu? last i heard no one had figured it out yet.

nah, its still in the works

I think he means bent valves, but then again, maybe there are secret belt valve stems that we don't yet know about.