Was driving along a twisty B road today having some fun, when the car started limiting itself to 4.5 thousand revs and the check engine light came on. The car is running fine appart from limiting itself, was running a little low on fuel at the time, so i've filled it up now. Was hoping after restarting the engine this would clear the fault but it hasn't. Do i need to reset the ECU? (its a standard MY93 WRX ECU) and if so how do I do this, disconnect the battery for a certain length of time? What could this fault be? Low fuel pressure? There are no leaks of any kind.
Also speedo stopped working yesterday, not my week Stripped clocks out and the speedo cable isn't spinning. The cable isn't snapped either, as if u try to turn it there is resistance, obviously something wrong the gear box end. What could this be? Any ideas on either problem?, ur advice would be greatly appreciated

 

Any ideas guys?

 

If the speedo's not working then the car will go into LIMP HOME MODE.

0.5bar boost, limited to 4k rpm or summit

i had the same problem when i stripped my speedo down as i wanted to change the bulbs in the back, put it all back together then the speedo wouldnt work, had to use it tho so out i went and all ran fine untill i floored it and it realised the speed was disconnected then it limited me.

found out that the speed cable is short and fell out when i removed the binacle and i couldnt put the cable back in whilst the binacle was out as it didnt reach. so i put the binacle back in with out the cable attached then had to reach up and plug the cable in.

yours might have come off at the gearbox end though.
hope this helps,
GAZ

 

Cheers Gaz, sounds like the same prob as me.