hi there i have a 1995 sti (import) i have a missfire, runs very lumpy, and very poor power, seems very flat, the engine light has been on but is off now,

i have conected the two black diagnostic conectors under the steering coloum and have found:-

21 - engine colant temp sensor?

24 - idle control valve?

31 - throtle position sensor?

can anyone plz help me with this? are these faults related?

thanks mark

 

Firstly reset the ecu and see which code reoccur.
Is rad fan when engine cold?
If so the coolant temp sensor def failed or not plugged in etc

 

ideal, i have reset the ecu once and the engine light has gone off, but the same three faults are still there, the temp sensor is pluged in, if the sensor is faulty will it cause it to missfire? also would the other two faults b related?
thanks mark

 

hi alex,i hav a 95 sti import,also with a misfire,hissing,lost all power,smokking & smells of fuel,seems the throttle body its self is worn were the throttle mounts,its worth a check that sensors not wobbling around,give that a quick look

 

are the rad fans on all the time????

 

that sounds like dumpvalve stuck open or split intercooler pipework.. check between turbo and intercooler etc..

Simon