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Well, I think I’ve found one of the reasons for the lost mileage. Delicate problem though. Computers are bad enough to deal with but at least they are logical. Wifey is another kettle of fish. She doesn’t use the chevy a lot, just shopping trips etc after she finishes work. Found out that she doesn’t trust the hydroxy system and has been switching it off when she uses the car. So the computer spends most of its time relearning the fuel maps for with or without hydroxy on these short runs.

Can’t make an issue of it or she will blow it out of proportion, so had to be sneaky

Fixed another hidden switch to turn the system on or off, and just wired the original switch to the led that indicates system is on. Now she can turn off the switch, that she thinks controls the system, to her hearts content without screwing up my efforts.

Heck, wimmin think that it’s ok to tell us what we want to hear, I’m just using their tactics to stop her messing up my efforts. Difference is, I will tell her eventually that she has been driving with hydroxy on, with no ill effects.

Hopefully running full time on hydroxy will allow the computer in the car to settle down and give back the gains I was getting before she started using the car again. When I first fitted the system she refused to drive at all, but retail therapy proved more powerful than her distrust of my work. At least I had the car to myself for almost a month though

Wimmin………… lovable but still a pain in the butt at times.

Rik