skipping and bucking

[ladenblowfish]

Hey guys, today when I left work to come home my mark started skipping and bucking from idle till around 3000 rpms. Mostly about 25-65 mph. So almost all the time. The check engine light came on and off the whole way home. Would an O2 sensor cause this? I've pretty much changed all other sensors over time except for the passenger side o2. I changed the drivers side about a month ago. I ran by Advance and Auto Zone but they said they couldn't check OBD1 vehicles. (they probably don't know how) LOL. I may just go ahead and change the o2 since I already have it. Just to see if it fixes it. Unless you guys have any other ideas. Oh I also checked the fuel pressure and its good.:shifty:

 

[Staffamerica74]

sounds like a coil

 

[BAD97LSC]

use this to count your check engine light blinks, then look up the code online to see whats wrong, this plug is the eec test plug on the driverside strut cover. just use a jumper wire to pin # 2 and then stick the other end into the plug that is seperate from this one pictured, the self test trigger plug on the right. when you pull the cover off this plug, a seperate wire with a square connector will be on the side of it, once jumpered, get in the car and turn the key on to acc positin and count the series of check engine light blinks, ex... check engine light will blink 3 times, pause, then 5 times, pause, then 5 times, this is a code 355, egr dpfe module out of range, you can look up codes in the list.

http://www.wiring-wizard.com/FaultCodes.htm

 

[Goddard-MarkVIII]

do you hear any clicking?

 

[ladenblowfish]

Thanks for the input guys. I'll check it out today.

 

[slowmkviii]

sounds like a coil

+1 or a bad wire or old spark plugs somthing causing a miss