Weird idle problem.. vacuum leak?
the battery gauge isnt twitching so thats fine, but i recently had new wires and plugs put in and it started doin this about a week or two after this happened.
You open the throttle blade
The IAC valve opens
Vacuum leak
You are not opening the TB
A vacuum leak will always be an increase in rpm....NEVER a decrease
The IAC can increase, decrease and stall the engine.
Go buy a new one and see if that fixes it. If it doesn't, return it.
Also.......a failing fuel pump or clogged fuel filter can cause a drop in rpm......but it can't cause an increase in rpm.
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