| Re: 1991 4.9
Are you sure you got the firing order correct when you changed the plugs? Also, you mentioned a new EGR valve. Did you clean the stack tubes from the throttle body intake ports at the same time? Might also want to check fuel pressure, even thou you have NEW parts. (NEW means Never Ever Worked!)
Last edited by AMENCADDY; 07-05-09 at 08:31 PM.
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