i need advice and help Cutlass 96 3.1M

[bbudziszek]

Just recently i had added 'Sea Foam' injector and throttle bady cleaner to my car, my co work had kick the rpms to high i think, but the result after using this chemical was a random cylinder mis fire in cylindr three. now i figured it was just the chemicla and it need to be worked through, so i ran the engine for a while and drove the car for a good while. but the misfire persisted. then i start with the obvious injector cleaner, thinking there was something clogging the injector, but no, still misfired. then i went throught the whole ignition system replacement, from plugs to ignition module to wires to all three packs, and still nthing. my last resort is the injectors, i am lery on doing them though because of the cost, but i am also caught with what to get, i have never needed to do my injectors, adn i am not sure if after market injectors will work as well as they should. but i am also concerned that it could be a O2 sensor that got damage during the rpm kick, or even worse a bent vavle. but i am at my roads end, and looking for advice on which injectors i should get, keeping in mind price and capatablity. but i also need help if anyone has had this problem before if it could possibly be somethings else that i am not seeing?
-Bob

[dwalmop]

if you have a bad injector, it should throw a code. Bring it to autozone or something to see if there are any codes stored. Not sure what else to tell you. I doubt you bent a valve.

[bbudziszek]

well i have some wicked bad news, i work at a garage, and we have check the codes and it keep giving cylinder three random miss fire. unfortunately i ahve been sort of ignoring it and drove my car as usual, but earlier this night i threw my lift an dbroke my timing chain, so oddly enough it was a lifter, i just wish i would have realized it before it flew threw my block.

[95cutty]

just for future info, when it comes to injectors you dont necessarily have to replace them, you can have them overhauled for about 15 bucks. just remember to keep cleaner in them every other gas tank