The last few times i have taken the car out, iv'e noticed that
when its cold, there is an off idle stumble.
And sounds really lumpy (like its got a huge cam, which off course it aint)
Its runs fine once its warmed up some, but cold, it just stumbles and dont
respond striaght away.
Thing is, i recently installed an air foil in the throttle body, now, it was fine before i added this, do you think it could be this affecting it some how when the engine is cold? or is it just coincidence?
what ya think, any advise is much appreciated.

 

Remove the air foil and see if it helps.

 

Yea, i was going to, but aint had the chance yet.
Just wondered if anyone else found that they had the
same effect on their car.
Should get time tomorrow.

 

I don't think they're related as I am having the exact same problem, I've already figured that it's not wire, plug, cap, or rotor related. adjusting the TPS helped very little. I'm going to check my fuel pressure and IAC next. my car also likes to cut out when I touch the throttle when it's cold.

 

didnt think it would be the air foil and it werent, was the same when
i took it out.
You had any luck checking fuel pressure and IAC?
I'm not too concerned, coz it clears quite quickly, but it is annoying.