Any thoughts to why please
Last couple of days shes been idling a bit lumpy and when the clutch has been dipped and the revs drop below 1k it somestimes dies(3 times on the way to work/noen on way back).
Today just before i got home i gave it a frap and the rev limiter came in at 4.5 and check engine light came on, and has stayed on.
Got home and thank god still in warranty period.

cheers
chris

 

oh yeah jap sti 1999

 

http://bbs.scoobynet.co.uk/showthread.php?t=439870

 

so what dr reckon dodgy fuel and safetys kicked in

 

I've got an MY99 that went a bit like that - but with no engine management light. Turned out it was the Lambda sensor...

 

Help its doing it again.
i reset the the ecu it runs fine for 5 or 6 days then on comes the light again.
GTauto funny you should say throttle sensor saw a post on SN chap reconnected speedo and that sorted prob, plus dealer said check speedo connection.
Are these the same thing and whereabouts do i find it.

Please help im sick of being overtaken by milkfloats (b4 anyone says it, no change there then Ha HA )

Cheers
Chris

 

Do the read fault codes procedure mate rather than just re-setting the ECU, then troubleshoot the codes from the lowest code number first.

 

try this and diagnose

http://www.saxonfields.freeserve.co....iag%20Page.htm

personally it sounds like.. do i dare say it.. MAF

could be lamda sensor also

reset ecu and it runs fine until the ecu has learned again then back to square one..

 

1999 STi you say... MAF Sensor without a doubt, had the same problem with mine...

 

just tried diagnostic and no fault found could be loose connection maybe?

If it s the maf can i clean it or test it?
Oh and sorry for my ignorance but is the maf the sensor on the air box.

Cheers

 

Yeah the MAF is the sensor in the housing on the Airbox, if its to blame it should show up on the diagnostic test, deffo sounds like what mine did till i replaced the MAF though.... very strange

 

done the dianostic properly now does help if you only connect the black connectors DOH!

Reads 33 = Vehicle speed sensor
If that the sensor connected to the gear box near the exhaust?
TA