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So i recently installed a new engine in my 04 1.7l civic and i got everything reattached like its suppose to and it wont start
Ik its rolling over,
im getting fuel and im getting spark i have a brand new battery. No codes are showing up on my ob2 scanner

Any suggestions about what might be causing my car not to start. Seriously stumped atm

 
Rep Power: 222

got compression?

 
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Its got compression on all 4 cylindeez hitting at 9.5 kgs like it should

 
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Update i took the top o2 sensor out and it started right up with no problems

 
Rep Power: 222

Exhaust restriction then?

 
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Yeah i think my cat is bad from where the old engine ****ed it up

 
Rep Power: 222

Well at least it should be a straight forward fix then

 
Rep Power: 210

Try starting it with gas pedal pushed to the floor..this disables the injectors and allows maximum air into the cylinders. Seems counterintuitive but it worked for me after head gasket replacement and other times when the engine wasn't cranked for a couple weeks. If that doesn't work spray starter spray in to the TV and crank the engine

 
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Firat thing that i tried lol but i took my cat out and it rattled like some maracas

 
Rep Power: 222

check the rest of your exhaust for chunks of cat

 
Rep Power: 229

RiP Mr.Mittens... lol

 
Rep Power: 222

 
Rep Power: 133

Bet you wanted to shuffle your feet when you shook your cat.