Hi guys, I'm fitting a new Fuel rail with injectors today, would I need to remap my ECU? or would the car even start with the new fuel rail but with no remap?

 

I noticed when I put on a new AMS fuel rail that my wideband AFR did richen up a bit.

 

so remapping is "recommended" but is it a must? I mean would the car even start without a remap?

 

It should start with out retrimming the fuel maps, but the AFRs will definitely be different as opposed to the stock setup. Just keep an eye on the wideband and retune it when you get a chance. Don't go beating on it if you can't monitor your AFRs.

 

Ok what's the easiest fastest way to retune the fuel maps? Would I have to take it to a tuner? Or can I do this myself somehow?

Sorry if this is a Noob question but I'm new to remapping Evos

and what is a wideband?

 

You can remap it yourself, get a 2.0 Tatrix cable (meant for the X) and EvoScan and ECU flash, you can tune it out, but it takes some knowledge to do. Go search around the Tuning forum and I am sure you will find all you need. A tuner could do it for you of course, but somethings you should learn on your own, and it will be much cheaper.

 

Would you be able to give me one or two links from the tuning forum relating to this particular issue?

I will do my research but I would really appreciate it if you could give me a link or two to get me started

Thanks

 

https://www.evolutionm.net/forums/ec...-tune-evo.html

Secondly, it seems like you have zero knowledge how to tune a Evo. I highly suggest you contact a tuner to this for you, or wait to get more mods, put them on all at once and baby the car to a tuner closest to you to save some money.

 

Upgrading the pump/filter/fuel rail is no problem. I'd skip installing the injectors until right before your tune. Your motor will get too much gas without a retune...when I asked my tuner "Will the car run?" his response was "Define run."

If you aren't installing a larger turbo or converting to E85 then you won't need fueling upgrades...the stock parts are good enough to max the stock turbo on pump gas. I did the same thing, tho...I didn't know better at the time. I'm ready to go when I get a larger turbo, anyway.