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View Full Version : Bone Stock hitting 30psi tappering down to 15psi WTF??



tico915
04-18-2011, 01:48 PM
Ok so heres the breakdown I bought a used EVO X with 18,000 miles from South Coast Mitsubishi.Â* I noticed once I bought the car it was way slower than I expected, figured it was stock expect for k&n drop in so I needed to mod it.Â* I bought a CP-E Single and put a boost gauge on it.Â* Here is where I noticed the problemÂ* when I pin the throttle boost spikes over 30 psi car feels amazing then it drops pretty drastically back down to 15psi this is were my car feels like a prius going uphill and then boost picks back up up to anywere form 16-23 psi.Â* Shit is driving me crazy Car doesn't appeared to have been fucked with before only thing I can think of is boost pill was removed??? :idiot2: please help. If car has a Tune written onto the comp can it be removed and returned to stock any way other than taking it to a tuner and rewriting a tune for it. Also if I floor it in fourth or fifth for awhile my asc turns off and dash lights up yellow saying service required

RALLInspired
04-18-2011, 02:09 PM
What is your location?Â* Bring the car down and I can pull the ROM and log it for you.Â* Sounds like the car may have an upgraded pill in the lines if everything APPEARS stock under the hood. Adding an exhaust and intake will cause the Evo Xs to overboost without a tune on a factory flash.

Rick B.

2muchboost
04-18-2011, 02:10 PM
I say get it to your local tuner ASAP and have them look at it!
Car may have been tunned for a certain combination of parts. Â*It could be that just before it was traded in the previous owner put it as much back to stock as possible but didn't flash the stock map back on. Â*I wouldn't floor it until you get it looked at.

RALLInspired
04-18-2011, 02:58 PM
The ASC light turns on because of the over boost. When the torque and airflow limits are passed the cars throw ASC lights. Tuning solves that issue as well.

Azian
04-18-2011, 03:20 PM
What color is it?

tico915
04-18-2011, 04:30 PM
wicked white I emailed reese bc he is the nearest tuner in my area I am in the military so dont really have to much time to be driving down to LA. ASC scared the shit out of me yesturday I came into a corner and got on it in third ASC turned itself off rear end came out and then corrected itself.

http://farm6.static.flickr.com/5145/5605380448_9900ddc822_b.jpg (http://www.flickr.com/photos/54002004@N05/5605380448/)

http://farm5.static.flickr.com/4099/5604796093_84686a5abd_b.jpg (http://www.flickr.com/photos/54002004@N05/5604796093/)

Black Evo Beauty
04-19-2011, 11:58 AM
seen that car before it was tuned get it corrected quick....

tico915
04-20-2011, 10:46 AM
Thanks man I just took it to reese yesturday I am picking it up today after work. I'm very pissed South Coast sold me the car assuring me it was 100% back to stock when they forgot the most important part reflashing the car, would of been intresting if the motor would of blown who would of flipped the bill.

xmuscle
04-20-2011, 11:03 AM
Let us know the outcome - Best of luck Bro

tico915
04-20-2011, 07:52 PM
Just got the car back Reese tuned it at 24.6 psi of boost Car is putting down 286 hp 290 tq on a mustang dyno with a drop in K&N and a CP-E single catback everything else is bone stock care feels way smoother and pulls pretty good for mods it has.

xmuscle
04-22-2011, 07:26 AM
NICE! Glad everything worked out

Black Evo Beauty
04-22-2011, 11:04 PM
O0

krazydaveX
04-23-2011, 01:48 PM
U should let south coast know. That's BS.

Spool X
04-29-2011, 09:52 PM
sketch

christoph562
05-04-2011, 11:08 AM
south coast (or any mitsu dealer) would of fucked you either way.. they woulda said some bs to wipe their hands..
glad to hear the whip is up and running! nice numbers with those mods