THE CAR IS SHAKING AND SPUTTERING. I CHANGED THE O2 SPARK PLUGS, NO CHANGE, CHANGES THE COILS, NO CHANGE, CLEANED THE MAFS, NO CHANGE, CHANGE THE CATALYTIC CONVERTER, NO CHANGE. JUST TODAY, CHANGED THE O2 SENSOR, NO CHANGE. I'M THINKING ABOUT THE INTAKE MANIFOLD GASKET, WHAT DO YOU THINK?
Hit and miss or change and see proceedures can get verry costly and as you observe not fix the problem. If it's not broke keep fixing it till it is. Sorry. Codes tell you where to go to ffind the problem and fix it only. As you have changed a number of things it would be good to reset codes by disconnect battery for ten min and have a coffee. reconnect and test drive to see if you still have problem and havn't accidently fixed it already. if not then start with codes and go from there
my 1987 gmc 4x4 has a stationary steering wheel and their is no hole under key switch.so do i have to pull steering wheel to get to it? THANK YOU MICHAEL E SMALLEY SR.
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Why did you change anything at all? Makes no sense,
as you found out
Should be studying OBD2 Systems on the internet
Where are the codes you got--- so we can weigh in?
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