I went to turn my bronco on, which has a push button start wired in from PO to bypass a faulty ignition, and I press the button to engage the starter. After a couple seconds I realize I forgot to turn over the ignition key, I release the start button and turn the key. The engine momentarily chugs and then I see smoke coming from the carb area. I take this as the excess fuel being suddenly burnt but I failed to re-engaging the starter to keep the engine rotating.

So I try again, this time with the ignition key turned to the on position.The engine starts just fine, but I have a new noise. There is this hissing/whining noise coming from the carb area. Having driven the Bronco I notice the noise disappears once I apply moderate acceleration, but returns once I go back to light to no throttle.

The other symptom to my issue is it now idles higher than before with no way for me to bring it down. Usually I could just tap the gas pedal and it would drop the RPMs down to a normal 600-700 range, but not they remain around 1000-1200.

I inspected the area for any vacuum lines that might have come loose or popped off, but found nothing. Thank you in advance

 

Hrmm... I hadn't even finished reading your post and the first thing I thought of was a vacuum cap got blasted off (at least until your last sentence).
This has happened to me before. Several times. Just a good cough and POP! Off they go.

The hissing and high/rough idle are totally indicative of it.
I'd definitely double check, there may be one you're missing.


What type of carb do you have?

 

I apologize for not including that but it is the stock 2150.

I will certainly look over everything one more time now that I have a little more time and day light. I will post up here my findings.

I plan on doing a carb rebuild since I feel it could use it to begin with so that will give me a good chance to look over everything and see if something came loose.