Badly Seated Fuel Injectors, Would they cause severe shake and hesitation? Options

[Celicatime]

My 94 GT failed the emissions test and so I thought I would be mr. fixit and replace the fuel injectors among other things.
First of all - the injectors are a pain in the axx to get to but when I finally replaced them, I'm not entirely certain I seated them correctly.

I put everything back together and started the car and now the engine shakes and hesitates from the get go and doesn't get any better after warm up. I had a perfectly smooth engine and now it acts like the engine is missing a piston.

Before I go to the work of getting at these stupid injectors again I wanted to see if it sounds likely that my problem is related. (sounds silly to even ask it, but I really don't look forward to doing this job again).

[Silver94CelicaOw...]

Your car is OBD-I, which means if your readings are too high for emissions you can probably just throw on a new cat or two and you're good to go. It depends on what you failed for, then formulate a plan of attack.

Mine failed for the gas cap seal which is considered emissions in NJ. 6 dollars later that same day I got passed, no problems. If its just a high reading when they hook up the sensors then check things like your exhaust system that it's not rusted and spewing fumes from under the car, or cats are shot.