- Joined
- Aug 19, 2001
- Messages
- 10,749
- Reaction score
- 580
- Points
- 113
- Location
- So. Calif (SFV)
- Vehicle Year
- 1990
- Make / Model
- Bronco II
- Engine Type
- 2.9 V6
- Engine Size
- 2.9L V6
- Transmission
- Manual
- 2WD / 4WD
- 4WD
- Tire Size
- 35x12.50R15
This is very true, the PCM is always in a constant state of "learning". There should be no need to reset it.I understand what your saying about resetting the computer, but part of the software sniffs the exhaust and reads air intake temp through its own sensors you place on the vehicle(you can see the wires/sniffer in the pic). For all of the runs the rich-lean ratio was bout the same, no more than a tenth or two off. If it was getting more air and not realizing this it would show lean on the computer. And yeah the truck was fully up to temp-20 mile ride there. And just for fun cause we had it right there we cleaned the maf with some BS in a can that is supposed to not only clean it but "improve rwhp"-and SURPRISE-absolutely no difference. The poor truck got at least 10 runs that morning.
I would however say that the truck should be driven around several miles for it to readapt after swapping the intake.
FWIW, many years ago I swapped a K&N filter into my Ranger (just a filter in the stock box, not a whole intake). It seemed like there was a tiny infinitesimal power increase afterward, but I couldn't say whether it was because of the filter type, or if it was simply because I went from a dirty filter to a clean one. The K&N caused a whole bunch of other issues with the MAF & O2 sensors, the IAC and some other stuff though. I wound up taking it out and putting a paper filter back in. This time I couldn't tell any difference between them in terms of power.