I have 2015 evo x
i just rebuilt the engine and i know i need a new tune but whats weird is that when i start the evo it idle fine for few mins then it dies try to start it again it will start and then die instantly

I checked for codes i had P0450 and P0069

For the p0450 , I don’t have fuel pressure sensor because I have after market radium setup so my fuel pressure sensor is bypassed basically .

and for p0069 i believe it’s related to my Map sensor I have Omni 4 bar . But if my map sensor is bad, wouldn’t the car wont start at all?

why the car starts and then after few mins it died and wont start again, if I waited like 30 mins and started again it will start and run for few mins and then die again and does the same thing again and again

this started 2 days ago. I had the engine built about a week ago and I was driving it around without boost like around the neighborhood to help break in a he engine so it wasn’t right after the built , it’s recent

I plugged my scanned and checked the reading for my map and barometric and they were reading fine but that’s the reading I got when it died

any ideas or suggestions? Do you think it’s all related to my map sensor like not working properly ?

 

Omnibar MAP sensor issues can show up with engine temps. might as well get a backup since they break too often

 

engine temp? Oh wow I didn’t know that maybe I’ll start it and check the engine temp and see if it die at a certain degree. But you think it’s the map sensor that’s giving all those issues ? I already ordered one it should arrive today. It’s so weird because I had it for years with no problem

 

one guy here mentioned his mechanic let the car idle while pointing a heat gun on the MAP to get to the end result

 

I won’t be doing that lol
Just plug it he scanner and read engine temp while it’s running and see when it dies but my map sensor arriving today so I am gonna plug it also and test and I will come back here and update

 

ok but its more about the sensor temp. on my evo9 I can idle the car with the hood open, say I'm working on adjusting the biss. after a few mins somehow my strut bar gets way too hot to touch. obviously map sensor get hot too, and it would be different when the hood is closed.
going with a new map sensor to test would be best of course, like I said youre gonna need a backup anyway
mine stopped working when it got hot, not sure if the separation is related which i discovered way later. no idea if my tuner(s) broke it

new or the old one, I put a strap on it now just in case

 

that’s crazy and I think mine doesn’t care if the hood is open or not lol what strap you talking about? The one that protecting the wires? I always have that on it

 

the strap on top of the sensor, that should be less pressure on the glue to keep it together lol

 

so I got the new sensor I put it on and it seem that it fixed the problem!! So crazy. I turned on the evo, it started right away. Left it on until it reach normal temp and another 10 mins and it didn’t die . I turned it on and tried to start it again right away and it started fine too didn’t die. So I hope that fixed the problem. But when I scan for codes it shows me p0069 which is the map. Maybe it take some time for the system to clear it ?

 

I dont know the procedure to clear that. maybe just clear it. I thought no smog in FL

 

that what I am gonna do after I finish redoing the wiring under my steering wheel and tuck them in and we don’t have smog in Florida no

 

Omnibar MAP sensor issues can show up with engine temps. might as well get a backup since they break too often