hi all desperatly need some advice please , fitted full de cat exhaust today car is 93 wrx standard apart from exhaust. after i fitted the exhaust let car idle while i washed it then took it a run . about 3 mile later cheack engine light came on and engine wont rev over 4 .spedo also stoped working the only way i can describe the missfire is like the rev limiter.the other thing is i removed the cat sensor completly ,as i was told lambda sensor is in the heders should i have left it plugged in and tied it up .i know my way around a car but dont know much about scoobs. help please

 

the cat sensor (the one after the turbo) needs to be plugged in its part of the engine management circuit Speedo inop will put car into limp home mode (wont rev above 4000rpm) Sounds like the garage who fitted the decat section have damaged the gearbox speedo drive Hope this helps

[Edited by sti-spec-a - 10/19/2003 9:20:31 PM]

 

thanks sti ill try that

 

HI KEV

The sensor in the Exhaust is the cat on fire sensor.
It does NOT need to be in. Tie it up safe in the engine bay.
Your lambda is in the manifold. I have a 92 wrx.
Make sure the Garage re set the ECU,if not, Unplug the battery for
1.5 hours and then take for steady drive, this will sort the limp mode out.

Not sure about the speedo, as said, it could have been disconnected or
damaged when they did the de cat.

Hope it gets sorted

WW

 

As already said when there is a fault with the speedo cabling the ecu will not let it rev above 4500 and goes into safe mode etc..

Check the speedo cable and electrical plugs on the gearbox..

JGM