Hey, I still have the stock throttle body on my 88' Stang and I was about to change it today for different reasons and one especially: rough idle and overall throttle hesitation. My car has been sitting in the garage for 4 weeks becaucse I was waiting for new springs and I've had shipping troubles. A week ago, when I started the car, it began running with an unstable idle and I had prestone leak near the tranny. I checked everything and it was the heater's o-ring so it was nothing bad. Although, it didn't fix my idle problem. Yesterday, when the springs were installed, my car kept running with a weird idle and an obvious hesitation with a 1/4 throttle and a really obvious hp loss. I then decided to install my new 65mm Accufab TB and this is where I am at now. I was about to get the oldie throttle out when this **** happened: Prestone leak in the bottom of the TB. So now I have no idea how I could have a prestone leak within my intake!? Could this explain my idle and throttle hesitation? Thanks a lot!

 

check your egr spacer and gaskets.

 

it could have to do with your idle if you had an airleak at your egr spacer.

 

well i meant the coolant leaking in the intake, the egr spacer has coolant lines running through it to cool it, and you might have a leak there, i think your idle problem will probably be something else.

 

You might want to invest in a vacuum guage and run some vacuum test.

 

I cleaned the IAC and the car's idle is much better now. Thanks for the help

 

youre not worried about the coolant leak inside your intake??????

 

Not anymore There were only 2-3 drops and I realised they were in the egr spacer, not in the intake itself so no worries. I kinda got panicked when I saw some drops falling from the spacer but I realised it was nothing at all

 

what does IAC stand for

 

does it mean idle air control if so what does it look like and whear is it