have 90 acura integra LS jus installed new LS motor my first motor blew but my ?? is the 1st motor skipped really bad i went through the ignition and installed a new fuel filter now on my 2nd motor the problem has only gotten worse someone suggested the ecu could go bad.. will it? and does anybody have any suggestios to cure this on going problm pleez help the LS thinks its vtec only drives smoth above 4000 rpms crusing sucks it embarrising with it actingcrazy thanx ahead for any info

 

Sounds like a vacuum leak. Or at least 10 other possible things. Take it to a mechanic.

 

it throwing code 43 "the fuel system" i bought a new fuel filter and changed map sensor any other clues or guesses