NYPD-Arnold

iTrader: (8)

Can anyone explain this. When my car is cold, and hasn't been driven for a few hours, the pedal takes a bit of force to press down on, as if it's stuck. It's only the first inch or two of its movement, everything past that is fine. Once the car is warmed up, or has run for two minutes or so, the pedal works normally.

Why is this?

OutMaxxed

iTrader: (7)

im taking a guess but maybe there is moisture in the lines and the moving parts that lead to the TB and when its cold the parts freeze up?

MetaOrbit

iTrader: (19)

Not sure, but my fiancee's old 4th gen experienced this when it got cold - I found there was a lot of gunk in the throttle body near the butterfly.

I thought maybe that was preventing it from opening easily - cleaned it all out - never happened again, LOL.

michaelnyden

iTrader: (15)

mine does this too, but only since I put in a bored out TB...thinking the throttle drum stop screw may need to be adjusted...only problem with that is then it messes with your idle and you will have a whole host of other problems...the other way is to iacv learn and do the closed throttle position memory reset as well to get the throttle opener to open the butterfly more during cold so it's not stuck in the bore, while not revving the engine higher by telling the ecu to ignore the slightly extra open butterfly...

my guess is during the cold start, the throttle opener rod has something to do with it and where it is holding the butterfly at...if it doesn't open it enough, the butterly in the TB will be too closed and will be a little stuck in the bore till you force it open with the throttle...

spddracer

iTrader: (3)

Clean the Throttle body and plate

I use carb cleaner and a tooth brush, Scrub the plate, both sides and around where the plate closes on the tb housing. Wipe it out as good as you can with a rag, it may be a bit had to start if you get a bit too much carb cleaner in there.

NYPD-Arnold

iTrader: (8)

Will do. Thanks fellas.

michaelnyden

iTrader: (15)

well mine is as clean as a whistle (sand-blasted) and still does it which is why I made my suggestions above...

NYPD-Arnold

iTrader: (8)

And after a minute of being on, your pedal begins to move perfectly fine?

bigEL

I thought our cars have e-throttles, so there isn't actually a direct link between the pedal and the tb.

SoonerFan

iTrader: (5)

thats just the 3.5. the 3.0 has a throttle cable. there is probably moisture in the caple

michaelnyden

iTrader: (15)

that is exactly how it acts...I know there is not any moisture anywhere...and it never did this previous to putting on this new TB...which makes me think the throttle opener or iacv is not acting/adjusted correctly...

nypd-arnold...if you didn't change anything recently, then I would follow the recommendations of others on here as then it is most likely your TB being needed to be cleaned or maybe a simple adjustment of your throttle cable/drum stop nut...