Hesitation when cold

[justyfied]

So as I mentioned in:
classicsubarujusty.proboards.com/index.cgi?board=vivioengineissues&action=display&thread=91
My little Taz hesitates especially when it is cold. There is less of a problem when I use the highest octane fuel I can find, The cold engine high idle amounts to nothing more than a air leak or bypass around the throttle body! Once this is closed it runs better! Iam wondering if this shows a generally lean condition from the ECU or ECM.

[ultra_porcupine]

maybe you have a weak coil that could cause a lean mixtuer
just thinking if it dosnt fully ignite the mixture and the o2 sensor sees it it will lean it out
its time to put a REAL ignition system on it no jap scrap parts

[lincolntbird]

Hi justyfied, I don't know if you resolved your hesitation when cold [wether it be you our the car :-)], but if you haven't, then check your coolant temp sensor. Not the one for the fan but the one that talks to the ECU. If it is faulty it may be telling the ECU that the engine is warm when it is could & thus not enrichening the fuel mixture when needed.

[justyfied]

Dec 1, 2012 23:08:54 GMT -4 lincolntbird said:

Hi justyfied, I don't know if you resolved your hesitation when cold [weather it be you our the car :-)], but if you haven't, then check your coolant temp sensor. Not the one for the fan but the one that talks to the ECU. If it is faulty it may be telling the ECU that the engine is warm when it is could & thus not enrichening the fuel mixture when needed.

Thanks for the tip, It is pretty much .....Very FFFFFing cold these days and it does start and get me to work still! ;D
Iam starting to think it is a matter of simply just needing a new set of spark plugs. However Iam just too busy with Life's other little things to even bother to pull 1 plug to find out
Besides the rest of the plugs are hidden under the inter-cooler and that means that the chances of something going wrong during the otherwise simple job goes way up.
Whenever I have the luxury of catching up on all of my other things to do and have a spare running car to get me to work, well that's when I might just do all of the little things that TAZ needs done. Hopefully SOON