hey guy i alway come on here when i need help but just finally made an account to see if anyone can help me. i have a 91 crx si with a b20 block annd b18 non vtec head. i bought i from a buddy who got it from a guy its always been an unfinished project i have everything almost done except when i start the car it idles a little high and if i try accelerating too quickly it trys to bogg out. ive checked my fuel filter my dizzy and i tried to check my vacum lines although im new to vacum lines kind of. ive reserched and came across it could be a bad ground? any help is much appreciated. it still could be vacum lines but im not 100% i did them right honestly im pretty sure but not 100%. and noot sure where proper grounds should be. thanks.

 

What ecu, what injectors, any check engine lights, and has mechanical timing been checked, then ignition timing checked, and then correct idle set per the honda service manual procedure.

 

timing is good dizzy is good its throwing a coolant sensor code but i dont think thatd cause it to run super rough
andim running a pr4

 

Fix the code related problem then see how things change.

 

Agree, fixing the code and resetting the ecu will help.

 

Check your vacuum routing (use the 90-91 diagram):

90-91 Integra B18A1 Vacuum Diagram (with dashpot valve)

Also, the PR4 ECU will run your B20 engine lean. I'd recommend either increasing your fuel pressure (least involved option, but not perfect), or looking into a chipped ECU with B20 programming: Chipped OBD1 Non-VTEC ECU|HA Motorsports (will require OBD1 conversion)