hey guys, I just finished swapping in a Ls into a Civic, swap went through nicely. only problem that I noticed now is that my car bogs down considerably under 1500 RPM. I also believe it is running too rich as it sometimes backfires from the intake. I also noticed by gas mileage is kind of low. I was thinking a clogged cat could be at fault, any input?

 

bump.

 

More details yo

What ECU? any mod? boosted? etc.

 

running a OBD1 P75 with a jumper harness, I'm not boosted, just stock.

 

Check your mechanical and ignition timing.

 

I just re-did my timing when I replaced my timing belt, made sure everything was at TDC and all that good stuff.