How smooth is your idle?
#11
#12
The NGK's I bought were $2.29 ea. at AutoZone, so for $20 and 30 min of your time you could try them and see what happens.
#13
Sounds good, normally if it's vacuum related it will idle a little high. If you have no lights on, the computer thinks everything is rosy. I'd pull the plugs and look at them, make sure they all look like they are burning about the same, they should be a light brown. Make sure your plug wires are good and throw a can of injector cleaner through the system.
#14
#16
#17
I might be wrong, but I think the slight roughness is more noticeable on the 4.6 motors.
my brothers 2000 D2 and my other bros 98 D1 both have smooth idles. Both of those engines are using Bosch +4 plugs and 8mm STI wires. My 03 is using the same wires but with NGK Iridium plugs. Plugs maybe?? I assume its the 4.6 motor trait.
my brothers 2000 D2 and my other bros 98 D1 both have smooth idles. Both of those engines are using Bosch +4 plugs and 8mm STI wires. My 03 is using the same wires but with NGK Iridium plugs. Plugs maybe?? I assume its the 4.6 motor trait.
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