Losing Boost!

[jinxe#14]

Alright, I've got a problem with my baby, she runs fine until, I floor it, what happens is ill put it in first, then i floor it, boost goes to about 15 like its supposed to, and then wham around 4000rpms, she cuts out, boost goes to 0 and it wont let me accelerate unless i shift gears.
I've already given her the full tune up, and im still lost, any ideas and help would be great!
The only mods im running are a full three inch exhaust from the header back, and a three in. intake and an apexi bov. and magnecore wires with new ngk plugs.

[turboawdgsx]

How much did you gap the plugs to? It should be around .28-.30. Also is your BOV recirculated back into the intake?

Rob

[jinxe#14]

the plugs are gapped at .030, and im not sure about the bov recirculating, but at check here on my lunch brake. but im pretty sure it is.

[kjewer1]

I doubt the BOV is dumped back in. At any rate, it should cause this. I ran vented for years (not that it doesnt suck). Is this a 1g or 2g? If its 1g my guess is a boost leak is putting airflow over the fuel cut threshold. A 2g shouldnt hit fuel cut on a stock turbo, even with a leak. So my next guess would ignition as well. Does the car just basically shut down, or will it sputter and limp along if you stay in that gear, etc.

[SpyderEclipseGst]

Originally Posted by jinxe#14

Alright, I've got a problem with my baby, she runs fine until, I floor it, what happens is ill put it in first, then i floor it, boost goes to about 15 like its supposed to, and then wham around 4000rpms, she cuts out, boost goes to 0 and it wont let me accelerate unless i shift gears.
I've already given her the full tune up, and im still lost, any ideas and help would be great!
The only mods im running are a full three inch exhaust from the header back, and a three in. intake and an apexi bov. and magnecore wires with new ngk plugs.

Is it a 1st gen or 2nd? Other than wires/spark plugs. Sounds like a fuel pump problem. I ran 16 psi on stock fuel pump fine. But Every car is diffrent. Otherwise I havent a clue.

[kjewer1]

I ran 12s on the stock pump for some time. The only pump related thing I can think of is when the person installing it forgets to add the spacer and/or Oring. Then it will give the exact symptoms described above. It usually happens right after (or shortly after) installing a pump though, it doesnt just happen randomly to a stock pump. Good idea though.

[jinxe#14]

Im sorry, im running a 2nd gen, and im also running a walboro 255lph pump. The only other thing that it's doing is if im just sitting and i rev my car, even without being in gear, the rpms will drop really low to like 200 or 300 then rise back up to about 800/900.

[BoostedSpyder]

you are hitting your boost cut, so either dump the BOV or get a boost controller. i just went thru a similar problem, where everything shuts off at about 4k rpm and idling is erratic and sometimes the engine would die alltogether on shifts, the rpm just dropps to zero.

[Talon007]

Are you running a AFPR with that 255? Is it a HO 255? That may be the cause of your idle problem