406EVO

Here's my problem:

My boost will no longer engage. I was driving today, boost was engaging fine, then when I shifted up next, there was no boost. No bad noises or booms/grinds/etc. were made, the BOV did sound like it closed quicker than normal, but the engine was still revving normally, boost gauge would not go into any boost.

This may or may not be relevant to the issue, but I did previously have a P0141 CEL on (faulty bank 1 sensor 2 o2 sensor), which I replaced last night, and while I was driving to NAPA to clear the code, is when this issue occurred. I cleared the code and the CEL did not pop back on, and I made sure to check the CEL if a different code had been thrown up and was masked by the original CEL, but there wasn't.

My setup is: stock b18b1, Greddy 18g turbo kit, Greddy RS BOV, and is managed by Greddy Emanage (blue box).

Any suggestions as to what to look at? Since the engine still is seemingly running fine, could it be the Emanage intervening for some reason? I am still relatively new to having a turbo car, so what parts would you guys look at for possible problems?

thanks

b16bri

Barrow and guage and confirm it's not the guage. Than check all hoses and couplers one may have blow off or have a crack some were and be leaking boost. goodluck

turbohatch96y7

iTrader: (15)

Chexk for booost leaks. Check to see if your wastegate is stuck open

4cfdeg6

Had the same experience before. The vacuum line that was "T" from the manifold to the gauge came off.

MR.johnson

Wastegate failed? Does the car still pull hard?

Bartman201

it could be a bad diaphragm in the wastegate.

xile6

i dont think so on these turbo since the spring is what keeps them close and the pressure on the diaphragm is what opens them.
But to the op check for boost leaks. Its it feels like its boosting but not showing then its the gauge. If it feels like its stock then it a leak somewhere. If ti feels slower then stock then its probably the turbo locking up.

wantboost

iTrader: (2)

boost won't engage..... el oh el