I'm running a stock p75 ecu on a b20b in my ej1. My new p75 came in the mail today and is waiting for me at my parents house till I get out of work. :/ It's chipped and base mapped for my setup on chrome. Do I simply plug this new one in or do I need to pull my ecu fuse or anything like that giving it time to reset?

 

Best Advice: Leave the old P75 in your ride, take new ECU to your tuner who will be tuning your car.

 

I'm pretty sure I'll have to purchase a widband? I'm real new to this tuning thing. I don't have much money at the moment. Christmas bonus on the 11th though. My car doesn't run to great with the stock p75. Smells like gas sometimes and has a strange idle here and there. Not the typical iac irratic idle. Back fires way to much also. If I'm on the highway cruising in 5th for a while and begin to slow down it backfires so hard it's insane. Has header and straight pipe to a 2010 oem si muffler. I've done a compression test and I'm 175 across the board. I'm not smoking or losing fluids. This new ecu should make it run better though until it's fully tuned passed the pre-existing basemap right?

 

I had the same exact prob with my 97 ej8 with a p2p and then I changed the tps it fixed all my probs was back firing real bad wld lag and take off and smelled like un burnt fuel and wld idle weird at times yea very irradic

 

on ur crome set up yea the ecu is plug and play but prob still needs fine tuned 2 the exact set up if you have crome you could do it its pretty ez to do if not id take it to ur tuner

 

sounds like a new ecu isn't going to fix your issue. do you have a check engine light on?