Had my plugs changed for some NGK IFR6T11 plugs last week,and since then i've got a really bad missfire.

The CEL code is up,along with TSC lights,but there is no CEL code from the OBDII reader in the dashboard?

Can i manually check with engine light flasing by connecting a paper clip with TC and E1 in the engine bay?

My GS is an early '01 model,where there was a change over apparently.

Car was running perfect before,i've got a 2nd hand set of coils/leads,and after changing no6 coil,it is better but still there under idle and throttle.

Don't think it's plugs,as misfire only appears once car is warm,not there when cold

Thanks

 

What scan tool are you using? Some better/enhanced scanners offer "History Codes" in addition to current codes. Check there.

Generic OBDII scanners usually do not offer this.

 

I just noticed that you said the VSC light is on too. The main MIL (Malfunction Indicator Lamp) can also come on when there is a code stored in the VSC system as well. A generic ODBII scanner will not access the VSC to get you this code either. You need to hook up to a better scan tool.

 

thank you for the reply mate,will get this looked into asap

 

No problem.