I have a ls/vtec in a 91 hatchback and I've read about switching/repinning the o2's to solve a hesitation problem, but to no avail. The reason I ask on which o2 sensors because I'm running two 91 civic si o2 sensors and that might be causing my problem. It also takes about 6-7 cranks before it starts. If any1 has any ideas drop a line please.

 

O2's for 88-91 civics and 90-91 tegs and jdm B16a are all the same. single wire O2's. if you are having cranking issues either ignition parts are worn or weak fuel pump other issues but hard to say unless I know more or can see the car. it is real hard to expect the car to just start at the flick of a switch it will take some turnover time to get started.