rough idle and bucking at staedy throttle

[benjammin]

I have a 93 ATX, I am having problems with rough idle and bucking at steady throttle but only at low RPM. Over 3000 seems to run fine.
I replaced the IAC, cleaned the MAF sensor.
I pulled the codes and it said "does not detect EGR valve opening". The EGR valve is pretty new and without much carbon build up and i cleaned the EGR passage port in the intake, but symptoms remain. The codes also said weak # three cylinder, the wires have around 40,000 miles on them, Would a bad wire cause these symptoms?

 

[Vnuk1]

Have you checked your plug wells for oil? And yes a bad wire could do this.

 

[benjammin]

no the wells do not have oil in them...the plugs look great and are gapped correctly.

 

[Vnuk1]

Maybe you have a fouled plug in Cylinder 3. How about your coil, how old is it?

 

[benjammin]

Im not sure about the age of the coil...but Im guessin its probably pretty old

 

[benjammin]

is there anything in the EGR system that I should look to besides the valve?...thats where the EEC is tellin me to look anyway.

 

[Vnuk1]

Yeah maybe just replace it. Mine does not have EGR so I don't have much info for you sorry.

 

[Vnuk1]

More related threads!CLICKY

Paging Hawkeye18 where are you Jason?!

 

[benjammin]

Hey thanks for the input...everyone here is always so helpful

 

[Vnuk1]

No problem, sorry I can't be more help.