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

My 93 Cabriolet did it too, but it had to run for 15-20 minutes first, then the idle would change and it ran like crap off idle. I gave up, sold the damn thing. VW's from that era are so poorly/cheaply built that I don't plan to ever buy another.

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2002 Ford ZX2
2 x 2013 Honda Civics

Exhaust leak. Vacuum leak.

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You don't need a weatherman to know which way the wind blows - Robert A. Zimmerman

Check for intake leak - common on VWs of that vintage. And like Kuan said, vacuum leaks too. There's a VW board somewhere out there, I just can't remember the name...

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08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280

Check out the forums at vwvortex.com

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1992 300D 2.5T
1980 Euro 300D (sadly, sold)
1998 Jetta TDI, 132K "Rudy"
1974 Triumph TR6
1999 Saab 9-5 wagon (wife's)

I was going for the same answer as well...specifically, vacuum leak occurring near the intake system.

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car

Hey did you have that pancake engine? The vacuum advance was taken from the exhaust so if you had even a teeny leak it'd throw the whole system off?

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You don't need a weatherman to know which way the wind blows - Robert A. Zimmerman

"Just A Missfire no help there" The goddamn thing is stalling and it has a missfire. Stalling is the ultimate missfire where all cylinders quite firing requiring a restart.

The problem is clear...




It's not a diesel.

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300TD W124, Two VW TDI Passat Wagons,Cummins Ram 250, Kubota Tractor
23 cylinders sipping the sweet sauce of the soy bean

Yeah its a POS for sure. I read the code and I'm like gee didn't know that thanks!


I was talking to my uncle at a party last night, he still has his beater 97 Cab that he towed behind his RV. He says it does the same thing, and his VW mechanic can't figure it out.

I just need to nurse it to April.

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

Their I fixed it!

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

Did you try cleaning or replacing the MAF?

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'85 300SD (formerly california emissions)
'08 Chevy Tahoe
'93 Ducati 900 SS
'79 Kawasaki KZ 650
'86 Kawasaki KX 250
'88 Kawasaki KDX200
'71 Hodaka Ace 100
'72 Triumph T100R

I cleaned the MAF as well as the intake, it costs $250 to replace. NFW thats happening.

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

my VW stalls, but I think it's cause I've only driven manual for a couple of days....



the joys of a mechanical system.

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-1983 VW Rabbit LS Diesel (5speed, VNT/Giles build)