SnowDrift
Ultra Conservative. ULTRA!
I had/have his 40 HP chip in the 94. I didn't notice ANY changes in power or economy. But to be fair, this site didn't exsist and I knew nothing about the 'place'. Long story short, didn't know you had to go into comp and play a little (reset timing). That and about a month or so after I got the chip, it went BOOM, so nothing to report here...
Side note, is 2 yr old fuel bad for the fuel tank??? LOL
I'm not sure I'm following you on this. With an EPROM, you remove the OEM chip and replace it with the new one and you're done. There is nothing further to do to see performance gains, necessarily, except to drive the truck to compare. If you saw no gains, then I'd say you got hosed or your truck already had an aftermarket EPROM in it.