I have a problem...

ill start with the mods:

EVO8: 93500 miles, new plugs, im also just about due for an oil change

MODS: cams, intake, exhaust, no cat, Perrin fuel rail, HKS EVC Boost controller, Apexi SAFC 2, Turbo XS UTEC, AEM A/F gauge, Blitz turbo timer

my problem is intermitten, when i step on the gas to accel between 60-85 MPH at around 3000 RPM, with only 20-30% throttle. The engine begins to spudder, that is what i can hear. visually there is no smoke no over heating, A/F gauge during the spuddering moves over 17 and then dropps out like it is getting to much air not enough fuel. My A/F ratio is uselly between 14.5 -15.9 until under heavier load then i run 11.5-13.1. I know my A/F gauge is working correctly in its read outs. to me its seems like its a fuel problem but i need advise since this is my first turbo car


please help out if you can

5706905591
gomcar25@yahoo.com


video of the gauge to follow shortly

 

Hey,

First, definitely ditch the AFC. These were good way back in the day.

Do yourself a favor and get a Tactrix cable / evoscan / ecuflash. This way you can adjust the parameters in the ECU itself instead of relying on a piggyback.

Read this post, it will give you a much better understanding of how to tune an Evo:
https://www.evolutionm.net/forums/ec...ing-guide.html

What cams are you currently running? I may be able to give you a base map.

Also, where are you in PA? If your close enough I would go see Chad@CBRD. They are a top notch shop and they will take care of you.



-Bink

 

http://youtu.be/R0s68fEz96w

 

im about 2 1/2 hours from them i heard they were great but i just got done spending as much on my wedding as i did on my EVO so im trying to solve the problem myself or some new friends

bc272 cams

 

Congrats on getting married


I might have a basemap I can send you later in order to get you pointed in the right direction.

How much boost are you currently running?



-Bink

 

around 25PSI

not dyno'd guessing the HP around 325

 

One last question. What injectors are you using?


-Bink

 

What did you gap the plugs at? I had a similar experience and it was spark related.

 

The plugs are new and gap according to thr book base on the video I posted and the air fuel going to high it sounds like a lack of fuel. Not sure

 

where are you located? i can take a look at it for you

 

have you got a tune after this mods ? on your car ?
if not , get a tune asap. looks like the car runs lean, to me .
are you abel to check the fule indector duty on your safc ?
have you got a fule pressure gauage ? if not get one installad ,