1999 Plymouth Voyager

Engine Performance problem
1999 Plymouth Voyager Front Wheel Drive Automatic

My van was running very rough to the point of almost cutting off in idle. I smelled gas(not natural), but the fumes, there was loss of power when trying to accelerate, and a popping or putting sound(only while accelerating. And using the a/c makes it worse. I had a diagnostic ran and the results were" fuel injector o-rings leaking badly on rear cylinders. Misfire codes for 5and3.P0300 multiple misfire.&Quot; I replaced the o-rings and it seemed to have a little more power and I could barely smell gas anymore. But it still ran rough. Then I replaced the coil pack it now runs smooth even in dle but it still has no power, and when I accelerate there's still a popping or putting like sound. And if I try and use the a/c it has even less power and the popping sounds are more frequent. It feels like the engine is struggling to go.
August 19, 2010.

Check out the related content below while we wait for the question to be answered by a professional mechanic.