Rough Idle only in Drive

[predator5100]

well i changed the oil sending unit nothing more than a sensor and oik pump any other ideas

[strange_trp]

rule out vacuum leak and faulty MAP sensor. sounds like its missing at closed throttle under a light load, and when you open throttle its okay. this is likely a sign of pcm not receiving accurate info about the amount of air the engine is receiving (vac leak or faulty MAP sensor/circuit will cause this)

although it COULD be base engine, i'd rule out the good stuff first.

[Jesticle]

anybody figure this out? seems like a bit of a problem for these auto 3.4's

is there a way to bump the idle a tiny bit? mine stops vibrating with a tap of the gas. The vibration gets worse with a drain on the engine (ie. when the A/C is on).

I thought it was just a bad muffler. I'm gonna change that first.

[saved1]

Turn down your 1 billion mega watt stero while you are driving and the shakin will go away LOL!
[img]graemlins/rock.gif[/img] (just thought I would throw a little humor in).

[ September 02, 2004, 12:11 PM: Message edited by: saved1 ]

[95Batmobile]

I didn't read all the replies so forgive me if this has been suggested..

I would first check if it was a misfire..
When you put the car under a load (put it in drive) it might be misfiring.

You can also check the fuel pressure.
Mine was about 36 cold and we bumped it up to 39-40 cold and it idles smoother now [img]smile.gif[/img]