Throttle screw ??? - Ford Mustang Forum
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post #1 of 4 (permalink) Old 04-08-2017 Thread Starter
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Throttle screw ???

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

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post #2 of 4 (permalink) Old 04-09-2017
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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.



2001 GT Convertible
/1967 Coupe
All the usual bolt-on's /200 I6, C4

And a few Explorers too... 2008 4.0 XLT 4x2, 1996 XLT 5.0 4x2, 2003 Sport Trac XLT 4.0 4x4
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post #3 of 4 (permalink) Old 04-09-2017 Thread Starter
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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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post #4 of 4 (permalink) Old 04-20-2017
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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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2002 Ford Mustang GT, 5 Speed, EiBach/Maximum Motorsports Sway Bars, Coil Over Springs, Caster Plates, Panhard Bar, Sub Frame Bar, Strut Tower Brace, KONI Rear Shocks. Pioneer Stereo, MGW Short Throw Shifter, RatFink Handle, interior led lights & red under dash. Chrome Pedals. Cobra Hood. Led reverse lights. Tint 5% limo in the back. 50% in the fronts. AirRaid CAI, Throttle Body Spacer Plate, MDK Coil Over Packs, Borla S Type Cat Back System, Bullitt Wheels, Hankook 285/265 Tires
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