95 TSI Accelleration issues

[drasticdezignz]

Hello all, first and foremost, I am new to DSM's, and yes I have been researching my topic, but not really coming up with too much... To what I have researched, I may have an idea what my problem is...

So first off, I bought my first DSM, 95 Talon TSI AWD from a Mitsubishi dealership last week, and the car has 150K on it, or roughly 94000 miles, pretty much stock besides a BOV, accell 8mm wires, eibach springs, and aftermarket cat back exhaust.

When I purchased the car, I did the oil change, changed the plugs, topped off all fluids, and checked the car over... seemed fine. When I brought it on the highway, the car ran fine until I tried to go WOT... When I hit 3000 rpms, and boost kicks in, the car stumbles and stutters and backfires a little. When I accellerate slowly, the car is fine, no backfire, and boost goes to 10-12psi [autometer boost gauge]. The car also idles fine, no problems.

When I looked under the hood when I got home, I noticed that the blow off valve was venting to the atmosphere, I think the previous owner was going for more noise...So I rented the BOV [purple top Greddy BOV, not sure what model this is?????] back to the intake pipe.

So from what I have researched here, the first thing I am going to do tomorrow morning is do a boost pressure test on my system to find leaks... next, I read on a post that it may be that my timing jumped??? I don't know if this applies because this only happens at WOT? Secondly, could it be that I may have to replace my MAF??

Any and all opinions appreciated

Thanks!

BTW, loving my new toy...

 

[95ttalontsi]

how does it drive after you hood BOV back the way its supposed to be, does it still do it? i dont think your timing jumped cause that would cause it to run bad all the time.

 

[drasticdezignz]

Yes, after I vented it back to the intake, it still drives the same, with acceleration stutter beginning when I get on the throttle. I am going to do a boost leak test today

 

[Remz540]

try gapping your plugs to 28mm no more then 32mm. Also did u change your coil packs if do so. See when the last time the fuel filter has been changed.. hope this was helpful.

MAB
(remz:540)

 

[bryanwheat]

It's either a boost leak, or old plugs and wires.

 

[drasticdezignz]

Found the problem!

Boost leak at the t-fitting where the previous owner installed the aftermarket boost gauge!

love the home made boost leak tester!

 

[bduran1220]

take some pics im about to install a gauge pod my self. i wanna see how yours is installed and hows its ran out

thanks!!!

 

[gusu]

take some pics im about to install a gauge pod my self. i wanna see how yours is installed and hows its ran out

thanks!!!

This is how. http://www.dsmtuners.com/forums/art...099-boost-gauge-install-where-tap-source.html