well i was doing a pull today at about 7.5 psi and my engine cut out real bad... my afr was fine but knock went to 6 right before it happened..

 

is it still running? (u didnt explain much)
will it turn on and idle?

If it wont even crank then u hydrolocked the motor, because of a popped headgasket. or broke/bent a rod

If i had to guess.. id say bye bye headgasket. (but u didnt really explain much)

tahts worse case scenerio.. umm.. did u check all ur intercooling connections and maf hookup?

If the car will turn on, and atleast remotely idle.(without many colors coming out the exhaust) its proabbably nothing wrong other then a connection(being an injector or intercooling or other sensor not mentioned)
if its 'motor' then its headgasket or rod... headgasket should allow the car to idle(kinda). rod normally wont at all(except in my car if u do it just right.. LOL) (drove home with 3 cyclinders and a hole in the oilpan)
(ok. well almost made it home.. LOL)



More info bro... whats the car doing now.........

 

yeah still runs and boosts to 7psi lol

it just kinda cut out and slowed down like someone squeezed the intake...

i think its fine. runs good same as it did lol

 

well it happened twice again... looks like my batter peaked at 14.08 then my tps went from 94 to like 12 and my idc and pulse width both went to 0

 

fuel cut? compressor surge? misfire? bad plugs or gaping?

it only happens in wot its like i hit a walland then the cars back to normal...
it looks like a fuel cut from what i described above... if actually hurts my chest pretty bad when it happens yankin me forward.

 

replace the plugs for starters(5$ fix). gap to .021-.025 range. mostlikely cause for a misfire.

 

What is your fuel cut set to ...what load, I set mine at 150 since that's the max I would hit if something came loose. If you are using my ROM on 7psi, you're hitting that cause I run 5psi and got like 140 load.

 

Check both the above first it sounds almost like a misfire. If the plugs don’t fix it if it cause's an engine light check and see if your getting and p0300, < random cylinder misfire, P0301 < cylinder number 1 misfire. If so see if they are cylinders on the same coil like 1 and 4 or 2 and 3. If so switch coils see if it moves to the other cylinders. When I went boost I had a weak coil an as soon as I would hit boost it would miss like crazy. But I would check what they said first easier and more likely the cause. Good luck

 

alright thanks guys they all sound like great ideas.

but im not getting a cel and like i said my idc and pulse width are goin to 0.

so i went ahead and checked the fuel cut load and it was at 170 and im going up to 190 so i think thats the problem.

im gonna change it to like 230 and go do another pull and let u guys know how it goes

 

yeah it was just the fuel cut thank god.

anyways can anyone tell me how to set up the mpg fuel consumption in evoscan?

also how much is the evo maf going to throw off the tune i have now? rich or lean?

 

triple post :l

i put the evo 399 maf on today and its idling pretty good but if i just hit the gas for a sec or im driving and i come to a stop my afrs are down in the 11s.

also im running super rich in boost. should i just add more fuel in the map, change maf scaling, or change injector scaling?

im going to log more fuel trims hopefully that will give me more insight. but as of tonight they were both around -2.

 

or get some defi gauges

 

I think you are going to have to scale the MAF. Did you read senate's thread on the install of it??

Here it is:

https://www.evolutionm.net/forums/la...tep-guide.html

 

yeah im not sure the defi gauges will do squat for me right here?

anyways i have looked at that several times but it just says to use it as a starting point not much info on actually tuning it. also my axis values are different then the ones he has, probly becuz of the tephra rom.

 

If I recall right I am using the stock 2003 evo 8 values for my 399