still rough idle

Posted by steve828 On 2011/7/2 13:10:01

Big Kev suggested on reply to my 6/21 posting that there may be debris in my gas tank starving the engine of fuel thus causing my rough idle issues. Based on my symptoms, I will pursue Big Kev's idea since the car runs fine at first start up, runs rough after a mile or so, then runs smooth after an immediate restart.

Question..what is the best way to check for sediment/rust in the tank and remedy it? PS, I show no dirt in the glass bowl sediment collector of my fuel filter, I have installed a new (rebuilt) fuel pump with neoprene gaskets, and the previous owner advised me that the gas tank had been treated with re-nu (how long ago not sure). PS, the car stopped running and would not restart once in the last couple months since I purchased it because of a debris chip clogging one of the check valves in my fuel pump. Suppose I should have put 2 + 2 together earlier than this. Also, I have noticed there is some kind of light colored coating in the fuel filler neck (maybe from the re-nu process) that has had several chip-shaped scrapings taken out of it by a gas station pump nozzle during routine refueling.

Thanks again for your thoughts! Happy 4th of July.