Do you have to replace all fuel injectors if only two are bad on a 1996 dodge stratus?

No, you don't have to replace all fuel injectors if only two are bad on a 1996 Dodge Stratus. It's perfectly acceptable, and usually more cost-effective, to just replace the faulty injectors. However, it's wise to have the other injectors inspected to make sure they're functioning correctly and within spec. If they are nearing the end of their lifespan, replacing them all might be a preventative measure to avoid future problems, but it's not strictly necessary.