I put some seafoam through my pcv valve first and followed all the instructions and it made baby purrr like a kitten. idle great at rite about 800 to a grand for a couple of days. so i put in half a can to about 3/4's of a tank of gas and it still was @ the same status for a couple of days. i started driving it this weekend and noticed that the exhaust was backfiring faintly during deceleration, but she always kinda did that. i drove to and from work monday and yesterday, tuesday and now the backfiring is somewhat like a popcorn-popping sputtery effect. it does the same thing when im idling at a light or just parked but its more of just the sputter. i also notice that the rpm's kinda fluctuate with the sputtering of the exhaust. it either does that or it idles at around 1200 which doesnt seem normal rite? whats going on?! !?!? what should i do? i did the plugs and wires before the seafoam treatment as well.


someone please help!! does the rest of it just need to burn out of my tank? has this happend to anyone??

 

Did you reconnect the vacuum line? I would double check your lines. It definitely sounds like a vacuum issue.

 

nah it was ok. i even passed over it with a propane tank. and when i was driving it today, i realized its actually more at 1400rpms when it idles and not sputtering. when it does sputter, the engine jolts. i just dont understand. sometimes it perfectly fine. most times it jolts. sometimes it idles high. ???

 

Check your TPS sensor, do a search on it and you will find out what you need to test.

 

AFM as well