1994xj

Hey guys.
I had a cracked exhaust manifold on my 94 that was driving me nuts so i swapped it out the other day. After i got done, I went to start it up and it took a very long time for it to crank. Im gonna say at least 20-30 seconds or more of the starter running. And when it did start up it ran like crap, wouldnt idle well at all, etc. So i killed it, checked over my connections and stuff to make sure i didnt leave a hose or connector unplugged and cranked it back up. Again long crank time, and runnin like crap. What should i start with to check?

maybe2fast

vacuum leak from intake manifold, or o2 sensor took a crap like mine.

but it sounds like you got a large vacuum leak

what kinda of manifold did you use?

1994xj

I got a stock replacement from work. I used a Fel- Pro one piece intake/exhaust gasket.

Lowrange2

Spray starter fluid all around the gasket while it's running. Listen for any change in the way the engine is running.

Don't singe your eyebrows off.

1994xj

lol. I will check it out when i get back home today. Thanks for the help guys.

Outlaw Star

It's a good idea to coat the gasket with a copper gasket spray. This helps to fill imperfections in the gasket and mating surfaces. But also X2 on the vacuum leak.

Vincenza V

Did you have a rougher idle/running motor BEFORE the exhaust manifold swap?

Does having a cracked manifold mean you will have a rough idle?

1994xj

It was not running badly at all before. Just made a ticking noise that drove me about half insane.