What do I need now?

[fanman487]

Ok here's my current setup: 2g GST, intake, all stainless IC piping, 2.5 turbo back exhaust, Dejon Tool MBC. The last thing I put on was the exhaust. As soon as i did i noticed that when i went WOT my car would start to sputter at about 15 psi. I assumed it was the MBC increasing the set boost due to the increased exhaust size in addition to the max psi capacity of the stock turbo ( 17 psi so im told), so i tuned it down to 13 and 10 psi (i have a duel stage controller). Still, when my boost hits 10 psi, the car starts to cut out. I can give medium to full throttle and hold all the way to 9 psi or so with NO problem, but as soon as i hit 10 psi, power goes down the tube. Am i looking for a ported 02 housing and bigger fuel pump??? I can hit redline in neutral and it does it cold or warm. Is this even fuel cut? From what i have read fuel cut is supposed to be like hitting a brick wall at about 60 mph. This is more like a misfire. Help for the uneducated?

Thanks,

- fanman

 

[DSMcrazy3]

Have you checked Ignition coil, Plug wires, and or plugs? Although it happened when you put the exhaust on, could be a coincidence, and those are the usual causes of sputtering/misfire.

Josh

 

[fanman487]

No, and may i be the first to say that my car is due for a tune up, but Im talking the same day as exhaust and IC piping install - symptoms. Its also completely constant at 10 psi, not one psi more or less. Also, I can go balls to the wall all the way to that point with no problem at all. my plan as of now is a pre-winter tune up, new fuel pump, new O2 housing. Any possible solutions besides those?
- Thanks

Fanman

 

[DSMcrazy3]

Eek not me, last night was my 1st night turbo'd and I have a few problems with oil consumption, so I haven't run into any prob's like that..Sorry. Good luck though!

Josh

 

[fanman487]

Yea, I'm really itching to get this problem fixed. I miss talkin shit to the punks out here that slap flowmasters on a 98 mustang GT's and talk like they're driving Vipers. Worst thing is that I cant even try to run them right now, i cant even go full throttle for more than 3 seconds. And I am the only DSM guy here, holding up the respect for the "girlie" car that looks stock but hauls ass.

- fanman

 

[BOBS90TURBO]

It does not sound like you are running out of fuel, of course you can get more power out of a bigger pump but I really do not think that will fix your miss, I really think you need to check your plug wires, and of course,build a boost leak tester and check for boost leaks, I swear it is so common to find a few leaks on a car that's not ever been checked.