What would cause the Jetta in my sig (2L 4 cylinder) to stall at idle when its warm, and run rough when you give it some throttle off idle? When its warm and idling in drive and you give it the gas it will kind of want to stall, run rough than catch. 2k rpm and up its smooth as silk to red line. At idle it will sometimes bounce around a bit, but usualy its dead smooth.

CE light is on, but its just for a miss fire, no help their. But I'll try again for the codes maybe I will get lucky.

The ignition system is pretty much new, I did the plugs they are the correct type and gap. It also has a new bosch cap, rotor, and rebuilt distributer. The wires were done in 04 and are in good shape, the coil was done at some point after that.

It doesn't smell like its running rich, and the fuel mileage seems about right.

Could it be that warm up sensor? Autozoo wants $16 for it, I'm tempted to just try it. If I can fix this it will be running 100%.

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1969 280SE
2027 Ram 1500
2026 Genesis GV70
2007 Tiara 3200
1988 Egg Harbor 37
1981 Boston Whaler 17