I have never chipped a vehicle, and I never will. Get a programer, maybe if I ever build my 408 stroker the Ram, then I will have to reprogram he ECU.
Disclaimer: ive been working in the auto industry as a diesel tech and later as an indipendent auto and light truck tech for close to 25 years, ran two of my own shops for nearly 5 years. When I bought my Wrangler I knew jeeps had thier hickups so I purchased an aftermarket bumper to bumper waranty with extended power train waranty just so I wouldnt have to wrench on my own rig and could focusmon every one elses. Second day of owning said Wrangler, the CEL illuminated and I took it strait to the dealership I bought it from. Hey had the Jeep for 1 month, replaced a sensor I side he distributor and said I was good to go. Pulled out of the dealership and made my first turn back towards my shop when the CEL came back on. Turned arround and went back ino the dealership. Their machanic hooked up the cheap HF code reader and pulled some codes and sat down to watch YouTube. I told the guy to take it to Chrysler to get a certified technician to look at it, just in case he ecm needed reprogramming (and the local Dodge Dealership is the only one in my area that has the capabilities to reprogram/update an ecu). Dodge then had the SUV for another month, where they replaced the distributor, the oil pump drive gear and so ething else (I don't remember what). Drove it home wihout issue. Next morning I was heading to work and at the bottom of a steep grade, the drive gear let go. The jeep went into limp mode and started bucking violently in the middle of a patch of black ice. I bounced off of the gaurd rails on both sides of the road damaging the front fenders, bumper caps, denting the left rear quarter panel, and cracking 3 of the rims. I was able to limp back to the Jeep Dealership where they decided o put in the forged camshaft with forged gears, a better timing set, and adress the distributor drive gear. Again this took about another month. Jeep sent my Wrangler strait to the body shop when they were done, where it got new parts put on, quarter panel straitened out, and fresh touch up paint. The body shop couldnt source my wheels, so I had to do that myself. The body shop had my car for a month them selves.
So all in all I had the Jeep 4 monhs and put close to 500 miles on it just commuting to and from work and the dealerships. On my first out of the valley trip afer all tthe hard work was done a rod started knocking. I pulled over and called AAA for a tow back to the Jeep dealership, where I was told that because they put in the non oem timing parts the lower part of the engine wasnt in waranty any more. So I went back o he original dealership and turned the keys over. Unfortunately my financial isatution didnt like that, and is still holding me liable for the remaining 10,000. 7,000 for the jeep itself, and 3,000 for the engine they had to put in.