looking for some help,got a 02 type uk sti bugeye and it wont rev over 4000rpm.it starts to stutter,thinking it could be a coil pack.dont think its any thing to do with the boost side as it dose it just by increasing the revs to 4000.any help

 

Just to rule this out...

Is your speedo working i.e. the needle isn't stuck at the bottom? This will prevent the car going over 4,500rpm - due to a shagged vehicle speed sensor on the gearbox

 

Could be lots of things...

Try checking the plugs, HT leads, coilpack, fuel filter, injectors etc to make sure nothing is bad or clogged

Could be the crankshaft sensor though with what you are describing

I'm sure someone will come along with more advice soon!

 

just to let you know the history hear,i bought the shell,and built my classic parts into it.ive used the sti inlet manifold with the pink injectors.ive used the sti heads for that year of car,speedo not working head goosed,replacement on its way.i used the sencors off my own engine they were working fine used new plugs.but i dont know the history with the coil packs.car starts up perfect but wont rev over 4000.how can i check my in injectors are working ok got the v35 turbo and the proper sti intercooler the car came with its own ecu

 

Hi, just reading your missfiring problem. My 1993 WRXRA is doing the same, poping and not reving over 4000. My Speedo stopped working a few days ago. What is normally the problem. You said it could be the vehicle speed sensor on the gearbox. Where is it on the gearbox and what does it look like. Thanks , Alistair.
( I have been under the bonnet for the last few hours checking and cleaning )

 

dont think its the speed control sencor is causeing my problem,the engine wont rev over 4000rpm with the car going now where,your speed sencor is at top driver side of gearbox there is a plug with 3 wires in it

 

i think ive found my problem with help from the 1st guy.your prob wright about the speedo its not working the prob is in the head waiting for one tobe del.i disconected the batt for 30 mins and it runs fine till you go onto road then it goes into limp mode of max4000rmp think ive got a fault with my temp control switch too the tep seems ok but the fans are comeing on at the rad.need to find out what fault codes are thats causeing this.can any one tell what fault code finder i need to get,i see they sell them on fleebay but i dont know what one i need to get can any one help

 

Best bet is to download the free firmware, RomRaider:-

RomRaider 0.5.3b - Open Source ECU Tuning

^^^ That site tells you all you need to know, etc.

...And the appropriate lead - the Tactrix OpenPort v2.0 - to hook the computer to the car's OBDII port.