I have a 87 iroc 305tpi. The car was running rough and had little power, would stall out in gear and at stop signs. I set the timing to 6 degrees and it helped a little but it is still lacking power. I want to test the injectors and make sure they are the problem before tearing it apart. so far Ive replaced plugs, wires,cap and rotor, and fuel filter. I had the car running and unplugged one injector at a time. when i unplug injector #3 and #6 there is no difference in idle. If i unplug the others one at a time theres a difference in idle. I also have a gas smell in the oil. Could this be the injectors?

 

check ohm on the injectors, then pull the plugs, if you have a wet cylinder then you have a leaky injector