Car stutters at 60KPH

Hi Gary:
Checking the spark plugs is a good idea.
How long since you've changed them?

Engine Stalling Due to Mass Air Flow/Crankshift Position ...

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Buick Park Avenue Engine Stalling Due to Mass Air Flow/Crankshift Position Sensor Failure. This is a verified ... 1997 Buick Park Avenue- 3.8L V6160,000Visitor. Engine stalls ... car runs then stalls and won't start for thirty minutes. Upvote (36).

Buick stuttering Questions & Answers - Fixya

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94 Buick Park Avenue that stutters under a light load I have a 94 Buick Park Avenuethat ... Buick Century 97 runs rough and stutters when cold and gas applie Engine runs rough ... I have a 1994 buick lesabre it starts ok but stutters and stalls.

Check your EGR system.

Had similar problem on '04 Zetec. Turned out to be coil pak.

Usually your pcm, (onboard computer) will pick up anything out of the ordinary and set a check engine light. this will point you in a direction if the code pertains to the idle issue. If no check engine light, then being a ford you may have carbon build up behind your throttlr body butterfly valve/flap. this will cause a rough idle, as well as issues with your egr valve and your idle air control valve. Its really kinda difficult to diagnose over the phone so to speak, especially if you are dealing with a problem that your pcm will not pick up.

when you dirving at 60 kms and you applied brakes -- does the brakes peddle feel like it moving up and down ---- and front of the car vibrate a little ---- let me know -----reply

You may have an intermittent slow response on the rear O2 sensor, I'm not sure if you have a pre and post O2 sensor, off the top of my head, but I would get the system hooked up to a monitor to see if there is any pending codes (big change over from 1994 to 1995). Is it an OBDII system? As far as the stumbling, I have a 91 silverado with a 5.7L engine and it's had a very light stumble at idle since new, day one, and every sensor is on target, idle, 1000 rpm, 2000 rpms, 3000 rpms, and still has a slight stumble with all sensors within range. To this day it still has a slight stumble but it still runs great, Good luck, Gary

sounds like the front rotors are warped, sometimes they can be machined as long as they are within the minium thickness. I hope this helps, good luck

Try a crank sensor yet?

try some sea foam //and some fuel injector cleaner trust me this helps!!!!!!!!!!!!