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-   -   Throttle screw ??? (https://www.allfordmustangs.com/forums/4-6l-talk/1017361-throttle-screw.html)

Usaf1988 04-08-2017 06:37 PM

Throttle screw ???
 
What is it ? My car is idling and stubling when in drive and reverse

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SoCal2V 04-09-2017 01:41 AM

Doubt it has anything to do with the throttle plate set screw. If stumbling at idle, or idle in Drive/Reverse, first thing to verify is no vacuum leaks. Following that would be IAC valve operation.

Usaf1988 04-09-2017 03:37 PM

Whats the easiest way to find a vaccum leak.. Sorry im 19 and just starting school for auto tech. So im new to this

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Dataken 04-20-2017 01:11 PM

To find vacuum leaks you can use starter fluid spray. Do a quick google and you can see how its done. Also just check all the hoses and see if any of them are brittle and replace as needed.

Also check the IAC value this thing gets really dirty and can cause idle issues. You can pull it off and clean it with throttle body cleaner. Again you can youtube this for your car and see how its done. You could also just replace this part if its really bad I dont think the cost is that much.


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