My car was having the shuddering problem whenever i was @ a redlight.

I talked w/ multiple people here about the problem and got answers like

spark plugs

coil packs.. but those were apparently never the issue,

he hooked it up to the computer and it was idling at 420, he then got out turned a **** behind the strut bar and bam, works like a charm

now

what the hell caused this to happen?

 

-Vibration??
-Or possibly this has only covered the 'symptom' of the problem??
-Possibly your MAF is starting to go? (starts at idle, wearing out the variable resistor)
-Or maybe just some basic bad luck......

good luck!

dave