I know this is apples and oranges - BUT
When I had an ole dodge Dakota that thing would never pass emissions, even after dropping money at the stealer and they swore it was OK.
So long comes an idea that is out in left space. it was the time that AMACO was advertising the ultimate grade that you could see thru in the glass full of it.
i drove the vehicle down to as much as I dared towards empty. Even carried a little spare gas if i got empty.
Then drove into the AMACO station and dumped some ultimate in it. Took it out and let her eat on the free way for some miles. Then zipped into the station that was always flunking the test and it passed with flying colors. i did the same for the following years.
just my story and I am sticking to it. good luck with that beast.
BTW at the time they even sold snake oil that was supposed to help, but that didn't work on my Dodge.
