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Message: <blockquote data-quote="shovel" data-source="post: 1586706" data-attributes="member: 29855">Regarding the aftermarket ECU..    scope creep is a real thing and you might be thinking you're going to do 2 things but then that turns into 3 things, etc.    The mistake I made was first trying to work with the stock ECU doing work-arounds and band-aids all trying to convince it that everything is still normal.   Huge waste of time and money,  I should have gone straight for an aftermarket ECU. As for the PimpX itself - that was great.  Completely worth it.   I went with dual widebands (it can work with just 1) and deleted the MAF while retaining the stock airbox.. allowed me to clean up a fair amount of stuff under the hood like the secondary air system, etc.  and I was able to program in the EGR and evap to work like stock, super nice.  However if I was going to start over from the very beginning I'd do a fully standalone ECU like Aces Joker or a Holley Terminator etc.  that has its own fresh, isolated, new wiring harness.   Would be a lot less work and probably less expensive overall, and in the future if troubleshooting is needed there won't be any confusion about what goes where,  whether it's me doing the work or a future owner or if I have to bring it to a shop.</blockquote>