Stang0005

I just swapped out my old plastic manifold because it finally sprung a leak. Everything fit back together nicely but once i started it back up, the idle was a bit rough. Sounded like i put cams in it. It also feels as if its bogging down while im accelerating through all gears. I double checked all the lines to make sure everything was connected correctly. Not sure where else to look without tearing it all back down again. Any suggestions?

ESABATM

spray carb cleared around the manifold and see if it gets better, Sounds like a vacuum leak to me. Possible coolant in stark plug wells.

kugzgt

was the pi intake new or used? possible crack in manifold?

JC316

Vacuum leak is the obvious choice, but you might have damaged a coil or two when you removed them.

xbeaus

sounds like it's not completely sealed up

Stang0005

UPDATE: My check engine light came on today. It threw the cylinder 5 misfire code. Hoping its only a coil or the spark plug. But I have replace the coil less than a year ago and the spark plug a month ago. But the reason I had to replace that coil was because I had a blowout on that cylinder. Stripped the thread and all. Had to put an insert in. But in wondering why this is happening now after the intake install. And yes it was new.

uberstang1

Could be a coincidence that coil went bad, did you use a cheap replacement when u changed it?