99 Passat Rough Idle

My 99 Passat V6 (Manual) has been running alittle rough recently. It has actually even stlled twice. Once after running hard (hiway) then coming to a red light, and once while running hard I had to pull over an stop. Both times after a few minute rest I was able to start and continue my trip almost as though nothing had happened

Other than that it is hardly noticable at higher speeds, and sometimes misses when pulling out. The most noticeable symptom is coming to a stop. The tach bounces between 800 and 400 then smooths out to ~800. I have tried fuel injector cleaner and have replaced some of my vacuum hoses, which helped some, I'm sure there are many things possible like fuel injectors, plugs (changed last april) plug wires, fuel filter, fuel pressure regulator ... does anything sound more likely than others

Any other suggestions

-- Aced2X

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Aced2X
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Get it scanned for fault codes first and fuel trim data. Other than that it's all a GUESS and throwing parts at the issue.

Reply to
Lost In Space/Woodchuck

I also have a 99 Passat V6 manual and my car acts similarly, but it doesn't stall. When the car comes to a stop after running continuously for a while at moderate to high speed, the RPM's oscillate for a few seconds and then stabalize to normal idle speed. Mine has never actually stalled, but it comes close. I have no idea what is causing this, but so far it hasn't got bad enough for me to want to do something about it. Good luck with yours and let us know if you fix it.

Steve

Reply to
sfoy

try removing the throttle housing and cleaning it.

Reply to
Lost In Space/Woodchuck

Check the CRANKSHAFT POSITION SENSOR. I had the same problem in my 1995 passat B4. Resolved it by replacing the said parts.

"Lost In Space/Woodchuck" ??? news:3e3Pf.48$ snipped-for-privacy@news.sisna.com ???... try removing the throttle housing and cleaning it.

Reply to
Eric

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