2G Lack of power/bogs down under too much throttle

[SKOOOOJE]

When I give the car full throttle the engine bogs down and basically falls flat. It revs fine when going easy on the throttle. Tried replacing the TPS last night but the part from Rockauto was faulty. I've also cleaned the MAS but havent replaced it. Has a brand new set of NGK BRP6ES plugs gapped at .0028 as well as new NGK plug wires. Also have a Walbro 255 lph fuel pump with 550cc injectors and a Fuel Lab AFPR.

The car has been doing this since I bought it a year ago and I've maybe gotten to drive it for 2 months out of that year because I've just been chasing demons with it. At this point I'm willing to try anything because I just want to enjoy my car again. I'm going to do another boost leak test tonight just to be sure. But I'm holding around 15 pounds of vacuum at idle so I'm not sure that's the problem either.

Any other suggestions are much appreciated. In the video the first and last rev is full throttle and the second is easing on the throttle.

 

[pauleyman]

You have larger injectors but nothing to control them? 15 inches of vacuum? That's too low. Please fill out a vehicle profile and list everything.

Also do not clean the MAF again. You do not clean a Karman vortex MAF like you do a hotwire MAF.

 

[chrysler kid]

Go back to stock injectors

 

[curt-s]

Are you compensating for an extra 20% more fuel in open loop?
Idle and cruise it's still overloaded but at least trims can pull it back a bit but if you're on stock ecu and it has 550s, you're drowning the cylinders in fuel and your WOT would go terrible rich.

 

[SKOOOOJE]

Go back to stock injectors

Was doing it with the stock injectors as well, replaced them as the 550cc ones used were my cheapest option thinking the stocks were the problem

 

[curt-s]

BLT done?
What's your base fuel pressure
You might need a wideband to tell you afr in open loop
There's nearly a million things that could be at play.. need a way to get data.

 

[pauleyman]

Was doing it with the stock injectors as well, replaced them as the 550cc ones used were my cheapest option thinking the stocks were the problem

You still need to go back to stock injectors if you don't have a way to control them. You have added a problem.

When I give the car full throttle the engine bogs down and basically falls flat. It revs fine when going easy on the throttle. Tried replacing the TPS last night but the part from rockauto was faulty. I've also cleaned the MAS but havent replaced it. Has a brand new set of NGK BRP6ES plugs gapped at .0028 as well as new NGK plug wires. Also have a walbro 255 lph fuel pump with 550cc injectors and a fuel lab afpr. The car has been doing this since I bought it a year ago and I've maybe gotten to drive it for 2 months out of that year because I've just been chasing demons with it. At this point I'm willing to try anything because I just want to enjoy my car again. I'm going to do another boost leak test tonight just to be sure. But I'm holding around 15 pounds of vaccum at idle so I'm not sure that's the problem either. Any other suggestions are much appreciated. In the video the first and last Rev is full throttle and the second is easing on the throttle.

The only thing that stands out to me is the vacuum. Have you checked mechanical timing? How are you doing a boost leak check?
Do you have any way to datalog?

 

[SKOOOOJE]

I fixed the issue, it turned out to be the power transistor, but thank you all for replying and trying to help